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1. How to have an acute gastroenteritis and an Anxiety Disorder at the same time: Cannabinoid hyperemesis syndrome (CHS) Case Series

Author

P. A. Hernández Liebo, J. Romay González, C. Sevilla Díez, O. S. Anabitarte Bautista, L. Cayón de la Hoz, G. E. Cortez Astudillo, M. Polo Gay, R. Obeso Menéndez, M. Hoyuelos Cob, and M. Gómez Revuelta

Subjects
Psychiatry, RC435-571
Abstract

Introduction Cannabinoid hyperemesis syndrome (CHS) is an underrecognized condition characterized by acute episodes of intractable nausea and vomiting, colic abdominal pain and restlessness related to chronic cannabis use. Antiemetics commonly fail to alleviate the severe nausea and vomiting. A very particular finding is the symptomatic relief with hot water. Antipsychotics (such as haloperidol), benzodiazepines and/or capsaicin cream appear to be the most efficacious in the treatment of this unique disorder. Precisely, it has been studied that transient relief of symptoms with topic capsaicin or hot water share the same pathophysiology. Nevertheless, abstinence from cannabis remains the most effective way of mitigating morbidity associated with CHS. Objectives The objective is to study this phenomenom in our hospital and to alert of its existence in order to avoid a suspected misdiagnosis and overdiagnosis. Methods We report a case series of seven patients who attended the Emergency Room (ER) of a third level hospital located in Cantabria (Spain) where a psychiatric evaluation was demanded. Results The reasons for consultation were agitation and/or compulsive vomit provocation and showers. They were all women, with a median age of 29 years (range 21 to 38), who all smoked cannabis and in probable high doses (seven to up to twenty joints per day, information was missing in three of the patients) and probable long duration of consumption (more than nine years up to twenty-three, information was missing in three of the patients). One of the most striking findings is the time to diagnosis, being the median of years of more than eight (range from two to twenty-one). In all of the cases there is a hyperfrequentation to the ER for this reason (not counting other emergency centres we have in Cantabria which we don´t have access to), being the average of almost twenty-two times (thirteen up to thirty times), not diagnosing it until last visits. Another interesting fact is that Psychiatric evaluation is done approximately in a third of the visits, being the department that makes all of the diagnosis except in one case. In all of the cases there are a lot of diagnostic orientation doubts from different medical departments, being the two most common psychiatric misdiagnosis: Other Specified Anxiety Disorder and Other Specified Feeding or Eating Disorder. Two of the patients were hospitalized in an acute psychiatric unit for this reason, one of them nine times and the other patient, twice. Conclusions CHS has a very particular presentation which makes its recognition very simple. From our experience, it is an unknown entity for most of the doctors, something that needs to change in order to make a correct therapeutic management. Larger studies need to be done to make this findings more solid and for further information. Disclosure of Interest None Declared

Published
2024
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2. 'Weight loss, Semaglutide and Manic Episode': A case report

Author

J. Romay Gonzalez, P. Hernández Liebo, C. Sevilla Diez, O. Anabitarte Bautista, L. Cayon de la Hoz, R. Obeso Menendez, M. Polo Gay, M. Hoyuelos Cobo, and G. Cortez Astudillo

Subjects
Psychiatry, RC435-571
Abstract

Introduction The glucagon-like peptide-1 (GLP-1) receptor agonist Semaglutide has been widely used to manage type 2 diabetes due to its favourable effects on glycemic control and weight reduction. Proved to be safe in adults and elderly patients with renal or hepatic disorders demanding no dose modification. Affective symptoms are not listed as side effects in the product information. However, there is a recent investigation going on by the European Medicines Agency (EMA) after three flagged cases of suicidal thoughts in Iceland. In contrast, the Food and Drug Administration (FDA) recommend that patients with this treatment are monitored for suicidal thoughts or behaviour. Objectives This case study explores the possible relationship between Semaglutide treatment and the onset of a manic episode in a 57-year-old male with no history of psychiatric disorders. Methods We present a 57-year-old male with no psychiatric history of interests, with a previous good functioning. A one-week history of disruptive behaviours started, characterized by excessive cheerfulness, heightened euphoria, and reduced need for sleep. Family members describe a complex situation at home, with frequent outings by the patient, engaging in conversations with strangers, getting lost, and becoming more irritable with them. The patient and family relate this mood change after initiating Semaglutide for diabetes control, starting at 7mg doses. The temporal relationship between the initiation of Semaglutide therapy, precisely a dose escalation to 7mg, and the onset of manic symptoms prompted family members to notify the patient’s endocrinologist. Due to the inability to manage the patient at home and his unpredictability, they sought help at the emergency department, resulting in a psychiatric admission. Imaging and analytical tests show no significant abnormalities. Results During his stay in the psychiatry department, semaglutide dosage was reduced, and treatment with Aripiprazole was initiated at doses of 5mg, given the metabolic profile associated with medical comorbidities (obesity, chronic renal failure and diabetes). Subsequent clinical observations showed a gradual resolution of manic symptoms and an improvement in the patient’s overall mental state. Conclusions This case highlights the importance of monitoring and recognizing potential neuropsychiatric side effects associated with Semaglutide therapy, particularly in individuals without a prior psychiatric history. Further research is warranted to elucidate the underlying mechanisms linking Semaglutide with mood disturbances and to identify risk factors that may predispose certain patients to develop manic states in response to this GLP-1RA. Clinicians should remain vigilant and consider alternative treatment options if such side effects occur, ensuring comprehensive management of patients receiving Semaglutide for diabetes control. Disclosure of Interest None Declared

Published
2024
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3. Probability of the most massive cluster under non-Gaussian initial conditions

Author

Christopher Gordon, L. Cayón, and Joseph Silk

Subjects
Physics, Cold dark matter, media_common.quotation_subject, Cosmic microwave background, Cosmic background radiation, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Cosmology, Space and Planetary Science, Sky, Halo effect, Cluster (physics), Astrophysics::Galaxy Astrophysics, media_common
Abstract

Very massive high redshift clusters can be used to constrain and test theCDM model. Taking into account the observational constraints of Jee et al. (2009) we have calculated the probability for the most massive cluster to be found in the range (5.2− 7.6)×10 14 M⊙, between redshifts 1.4 6 z 6 2.2, with a sky area of 11 deg 2 and under non-Gaussian initial conditions. Clusters constrain the non-Gaussianity on smaller scales than current cosmic microwave background or halo bias data and so can be used to test for running of the non-Gaussianity parameter fNL.

Published
2011

4. Intranasal Esketamine administration in catatonia: a case report.

Author

J. Romay, C. Sevilla, P. Hernandez, I. Lastra, G. Isidro, L. Cayon, G. Cortez, O. Anabitarte, P. Ijalba, and M. Gomez Revuelta

Subjects
Psychiatry, RC435-571
Abstract

Introduction Catatonia is a complex psychomotor syndrome that often goes unrecognized and, consequently, untreated. Prompt and correct identification of catatonia allows for highly effective treatment and prevention of possible complications. Benzodiazepines and electroconvulsive therapy (ECT) are the most widely studied treatment methods. However, no uniform treatment method has yet been brought forward and no previous attempts to treat catatonia on a patient suffering concomitant major depressive disorder (MDD) with NMDA receptor antagonists have been documented so far. Objectives To describe the unknown and novel management of catatonia and MDD with intranasal esketamine, a NMDA receptor antagonist. Methods A 55-year-old woman with a diagnosis of long-standing recurrent major depressive disorder who was admitted to the psychiatric inpatient unit of UniversityHospital Marqués de Valdecilla (Santander, Spain) suffering a complex catatonic, mutative state framed on a severe MDD. Different ineffective therapeutic interventions were deployed during the course of her illness. After failing to improve under conventional pharmacological treatment and ECT, and given the complexity of peripheral venous access on this patient (which disabled the option for iv ketamine use), we decided to initiate compassionate treatment with intranasal esketamine. Results Intranasal esketamine was effective in the resolution of patient’s complex catatonic state. Clinical response from catatonia was observed after 6 intranasal esketamine administrations (2-week follow-up), reaching full catatonia and MDD remission after 12 sessions in absence of significant adverse events Conclusions Esketamine showed promising effectiveness for the treatment of catatonia in the context of MDD, although further research on this topic is needed. Disclosure of Interest None Declared

Published
2023
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5. The Non‐Gaussian Cold Spot in the 3 YearWilkinson Microwave Anisotropy ProbeData

Author

L. Cayón, Jiashun Jin, E. Martínez-González, M. Cruz, and P. Vielva

Subjects
Physics, Gaussian, media_common.quotation_subject, Astronomy and Astrophysics, Scale (descriptive set theory), Astrophysics, CMB cold spot, Confidence interval, Data set, symbols.namesake, Wavelet, Space and Planetary Science, Sky, Kurtosis, symbols, media_common
Abstract

The non-Gaussian cold spot detected in wavelet space in the WMAP 1-year data, is detected again in the coadded WMAP 3-year data at the same position (b = -57, l = 209) and size in the sky (around 10 degrees). The present analysis is based on several statistical methods: kurtosis, maximum absolute temperature, number of pixels below a given threshold, volume and Higher Criticism. All these methods detect deviations from Gaussianity in the 3--year data set at a slightly higher confidence level than in the WMAP 1-year data. These small differences are mainly due to the new foreground reduction technique and not to the reduction of the noise level, which is negligible at the scale of the spot. In order to avoid "a posteriori" analyses, we recalculate for the WMAP 3-year data the significance of the deviation in the kurtosis. The skewness and kurtosis tests were the first tests performed with wavelets for the WMAP data. We obtain that the probability of finding an at least as high deviation in Gaussian simulations is 1.85%. The frequency dependence of the spot is shown to be extremely flat. Galactic foreground emissions are not likely to be responsible for the detected deviation from Gaussianity.

Published
2007

6. Planck intermediate results X. Physics of the hot gas in the Coma cluster

Author

Nabila Aghanim, Jacques Delabrouille, Peter A. R. Ade, Amedeo Balbi, Fabio Finelli, James G. Bartlett, A. de Rosa, Ricardo Genova-Santos, W. C. Jones, Allan Hornstrup, Etienne Pointecouteau, R. Leonardi, T. Riller, Monique Arnaud, S. R. Hildebrandt, Pasquale Mazzotta, C. Renault, R. B. Barreiro, J. Knoche, Simon Prunet, F. Cuttaia, Gayoung Chon, Mika Juvela, Rashmikant V. Sudiwala, J. González-Nuevo, O. Perdereau, Anna Bonaldi, Lloyd Knox, Carlo Burigana, Davide Maino, X. Dupac, C. Hernández-Monteagudo, I. F. Bikmaev, Niraj Welikala, Marc-Antoine Miville-Deschênes, T. R. Jaffe, L. P. L. Colombo, Dmitry Novikov, Hans Ulrik Nørgaard-Nielsen, Marc Türler, Pavel Naselsky, R. J. Davis, L. Popa, Jean-Baptiste Melin, J. A. Murphy, M. Reinecke, George F. Smoot, F. Noviello, K. Ganga, J. Tuovinen, B. Van Tent, Simona Mei, L. A. Wade, Daniela Paoletti, Jussi Varis, Andrea Zonca, A. J. Banday, Klaus Dolag, L. Montier, A. Gregorio, Krzysztof M. Gorski, Jose M. Diego, M. Giard, K. Benabed, J.-L. Puget, Michael L. Brown, P. R. Christensen, Luca Terenzi, B. P. Crill, Lung-Yih Chiang, Dipak Munshi, J. R. Bond, Francesca Perrotta, G. de Gasperis, T. Jagemann, D. Yvon, Olivier Doré, E. Franceschi, Martin Kunz, H. K. Eriksen, M. Sandri, Mathieu Remazeilles, Torsten A. Enßlin, L. Toffolatti, Shea Brown, W. Hovest, U. Dörl, Håkon Dahle, E. Battaner, Rafael Rebolo, J.-P. Bernard, Anthony Lasenby, Charles R. Lawrence, E. Martínez-González, E. Keihänen, Matthieu Roman, R. Kneissl, Bruno Maffei, Saleem Zaroubi, Benjamin D. Wandelt, Julian Borrill, F. Piacentini, Nicola Vittorio, M. Frommert, G. W. Pratt, M. Piat, Gianluca Morgante, R. Piffaretti, Clive Dickinson, M. Le Jeune, I. Flores-Cacho, Alain Benoit, Simon D. M. White, L. Mendes, Sabino Matarrese, F.-X. Désert, Anne Lähteenmäki, G. Umana, A. Da Silva, F. Atrio-Barandela, Mariachiara Rossetti, S. Ricciardi, R. A. Burenin, J. Démoclès, Andrea Zacchei, S. Galeotta, Sophie Henrot-Versille, P. B. Lilje, Rashid Sunyaev, E. M. Churazov, B. M. Schaefer, Jörg P. Rachen, A. Coulais, Paolo Natoli, Olivier Forni, F. Matthai, Jose Alberto Rubino-Martin, F. K. Hansen, G. de Zotti, M. Ashdown, Paolo Cabella, E. Pierpaoli, Douglas Scott, W. Holmes, M. Tristram, G. Polenta, M. Linden-Vørnle, P. Carvalho, D. L. Harrison, T. Poutanen, M. Maris, Alessandro Melchiorri, Ben Rusholme, Hervé Bourdin, A. Moneti, N. Mandolesi, François R. Bouchet, Philip Lubin, L. Cayón, J. F. Macías-Pérez, Irek Khamitov, Graca Rocha, Marian Douspis, G. Hurier, Hans Böhringer, Kevin M. Huffenberger, Francine R. Marleau, Fabrizio Villa, Silvia Masi, M. Frailis, Carlo Baccigalupi, E. Hivon, J.-F. Sygnet, Lawrence Rudnick, Luca Valenziano, A. Mennella, D. Sutton, F. Stivoli, Nicolas Ponthieu, S. Donzelli, Luigi Danese, Marat Gilfanov, Alessandro Gruppuso, Giorgio Savini, A. Catalano, J.-M. Lamarre, S. Osborne, Michael P. Hobson, Hannu Kurki-Suonio, F. Pajot, David L. Clements, I. Ristorcelli, H. Dole, Subhabrata Mitra, J. A. Tauber, M. Tomasi, Marco Bersanelli, J.-F. Cardoso, Stéphane Plaszczynski, Guilaine Lagache, M. López-Caniego, P. de Bernardis, C. Rosset, J. Aumont, P. Vielva, Marcella Massardi, I. D. Novikov, A.-S. Suur-Uski, Sergio Colafrancesco, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Hélium : du fondamental aux applications (HELFA), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Traitement et Communication de l'Information (LTCI), Institut Mines-Télécom [Paris] (IMT)-Télécom Paris, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot, Sorbonne Paris Cité, Paris, France, Université Paris Diderot - Paris 7 (UPD7), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11), Planck Collaboration, Department of Physics, Helsinki Institute of Physics, University of Minnesota, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7), Hélium : du fondamental aux applications [2007-2015] (HELFA [2007-2015]), Institut Néel [2007-2015] (NEEL [2007-2015]), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology [2007-2019] (Grenoble INP [2007-2019])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology [2007-2019] (Grenoble INP [2007-2019])-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology [2007-2019] (Grenoble INP [2007-2019])-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), PLANCK, Anne Lähteenmäki Group, Aalto-yliopisto, Aalto University, Astronomy, APC - Cosmologie, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), HELFA - Hélium : du fondamental aux applications, Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), APC - Gravitation (APC-Gravitation), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, P. A. R., Ade, N., Aghanim, M., Arnaud, M., Ashdown, F., Atrio Barandela, J., Aumont, C., Baccigalupi, A., Balbi, A. J., Banday, R. B., Barreiro, J. G., Bartlett, E., Battaner, K., Benabed, A., Benoît, J. P., Bernard, M., Bersanelli, I., Bikmaev, H., Böhringer, A., Bonaldi, J. R., Bond, J., Borrill, F. R., Bouchet, H., Bourdin, M. L., Brown, S. D., Brown, R., Burenin, C., Burigana, P., Cabella, J. F., Cardoso, P., Carvalho, A., Catalano, L., Cayón, L. Y., Chiang, G., Chon, P. R., Christensen, E., Churazov, D. L., Clement, S., Colafrancesco, L. P. L., Colombo, A., Coulai, B. P., Crill, F., Cuttaia, A., Da Silva, H., Dahle, L., Danese, R. J., Davi, P., de Bernardi, G., de Gasperi, A., de Rosa, G., de Zotti, J., Delabrouille, J., Démoclè, F. X., Désert, C., Dickinson, J. M., Diego, K., Dolag, H., Dole, S., Donzelli, O., Doré, U., Dörl, M., Douspi, X., Dupac, T. A., Enßlin, H. K., Eriksen, F., Finelli, I., Flores Cacho, O., Forni, M., Fraili, E., Franceschi, M., Frommert, S., Galeotta, K., Ganga, R. T., Génova Santo, M., Giard, M., Gilfanov, J., González Nuevo, K. M., Górski, Gregorio, Anna, A., Gruppuso, F. K., Hansen, D., Harrison, S., Henrot Versillé, C., Hernández Monteagudo, S. R., Hildebrandt, E., Hivon, M., Hobson, W. A., Holme, A., Hornstrup, W., Hovest, K. M., Huffenberger, G., Hurier, T. R., Jaffe, T., Jagemann, W. C., Jone, M., Juvela, E., Keihänen, I., Khamitov, R., Kneissl, J., Knoche, L., Knox, M., Kunz, H., Kurki Suonio, G., Lagache, A., Lähteenmäki, J. M., Lamarre, A., Lasenby, C. R., Lawrence, M., Le Jeune, R., Leonardi, P. B., Lilje, M., Linden Vørnle, M., López Caniego, P. M., Lubin, J. F., Macías Pérez, B., Maffei, D., Maino, N., Mandolesi, M., Mari, F., Marleau, E., Martínez González, S., Masi, M., Massardi, S., Matarrese, F., Matthai, P., Mazzotta, S., Mei, A., Melchiorri, J. B., Melin, L., Mende, A., Mennella, S., Mitra, M. A., Miville Deschêne, A., Moneti, L., Montier, G., Morgante, D., Munshi, J. A., Murphy, P., Naselsky, P., Natoli, H. U., Nørgaard Nielsen, F., Noviello, D., Novikov, I., Novikov, S., Osborne, F., Pajot, D., Paoletti, O., Perdereau, F., Perrotta, F., Piacentini, M., Piat, E., Pierpaoli, R., Piffaretti, S., Plaszczynski, E., Pointecouteau, G., Polenta, N., Ponthieu, L., Popa, T., Poutanen, G. W., Pratt, S., Prunet, J. L., Puget, J. P., Rachen, R., Rebolo, M., Reinecke, M., Remazeille, C., Renault, S., Ricciardi, T., Riller, I., Ristorcelli, G., Rocha, M., Roman, C., Rosset, M., Rossetti, J. A., Rubiño Martín, L., Rudnick, B., Rusholme, M., Sandri, G., Savini, B. M., Schaefer, D., Scott, G. F., Smoot, F., Stivoli, R., Sudiwala, R., Sunyaev, D., Sutton, A. S., Suur Uski, J. F., Sygnet, J. A., Tauber, L., Terenzi, L., Toffolatti, M., Tomasi, M., Tristram, J., Tuovinen, M., Türler, G., Umana, L., Valenziano, B., Van Tent, J., Vari, P., Vielva, F., Villa, N., Vittorio, L. A., Wade, B. D., Wandelt, N., Welikala, S. D. M., White, D., Yvon, A., Zacchei, S., Zaroubi, A., Zonca, Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Hélium : du fondamental aux applications (NEEL - HELFA), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Shock wave, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astronomy, Coma (optics), galaxies: clusters: individual: Coma cluster, Astrophysics, cosmic background radiation, 01 natural sciences, ROSAT, clusters: general [galaxies], 010303 astronomy & astrophysics, Physics, Shock (fluid dynamics), TEMPERATURE STRUCTURE, MAGNETIC-FIELD, Radius, observations [cosmology], galaxies: cluster [X-rays], SHOCK-WAVES, Cosmic background radiation, Cosmology: observations, Galaxies: clusters: general, Galaxies: clusters: individual: Coma cluster, Galaxies: clusters: intracluster medium, X-rays: galaxies: clusters, clusters: intracluster medium [galaxies], galaxies: clusters: general, ALL-SKY SURVEY, symbols, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, astro-ph.CO, galaxies: clusters: intracluster medium, cosmology: observations, LAL 13-71, Astrophysics - Cosmology and Nongalactic Astrophysics, observation [cosmology], Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, education, FOS: Physical sciences, clusters: individual: Coma cluster [galaxies], Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], SIMULATED GALAXY CLUSTERS, symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, RADIO HALOS, 0103 physical sciences, LARGE-SCALE STRUCTURE, Coma Cluster, Cluster (physics), PRE-LAUNCH STATUS, Planck, Astrophysics::Galaxy Astrophysics, XMM-NEWTON, 010308 nuclear & particles physics, Astronomy and Astrophysics, 115 Astronomy, Space science, Space and Planetary Science, galaxies: clusters: individual: coma cluster, x-rays: galaxies: clusters, galaxies: clusters [X-rays], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], SUNYAEV-ZELDOVICH
Abstract

We present an analysis of Planck satellite data on the Coma cluster observed via the Sunyaev-Zeldovich effect. Thanks to its great sensitivity, Planck is able, for the first time, to detect SZ emission up to r ≈ 3 × R500. We test previously proposed spherically symmetric models for the pressure distribution in clusters against the azimuthally averaged data. In particular, we find that the Arnaud et al. (2010, A&A, 517, A92) “universal” pressure profile does not fit Coma, and that their pressure profile for merging systems provides a reasonable fit to the data only at r < R500; by r = 2 × R500 it underestimates the observed y profile by a factor of ≃2. This may indicate that at these larger radii either: i) the cluster SZ emission is contaminated by unresolved SZ sources along the line of sight; or ii) the pressure profile of Coma is higher at r > R500 than the mean pressure profile predicted by the simulations used to constrain the models. The Planck image shows significant local steepening of the y profile in two regions about half a degree to the west and to the south-east of the cluster centre. These features are consistent with the presence of shock fronts at these radii, and indeed the western feature was previously noticed in the ROSAT PSPC mosaic as well as in the radio. Using Plancky profiles extracted from corresponding sectors we find pressure jumps of 4.9-0.2+0.4 and 5.0-0.1+1.3 in the west and south-east, respectively. Assuming Rankine-Hugoniot pressure jump conditions, we deduce that the shock waves should propagate with Mach number Mw = 2.03-0.04+0.09 and Mse = 2.05-0.02+0.25 in the west and south-east, respectively. Finally, we find that the y and radio-synchrotron signals are quasi-linearly correlated on Mpc scales, with small intrinsic scatter. This implies either that the energy density of cosmic-ray electrons is relatively constant throughout the cluster, or that the magnetic fields fall off much more slowly with radius than previously thought., The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU). Partial support for this work for L. Rudnick comes from U.S. NSF Grant 09-08668 to the University of Minnesota.

Published
2013

7. Secondary Anisotropies in the CMB

Author

J. L. Sanz, Enrique Martinez-Gonzalez, and L. Cayón

Subjects
Physics, Gravitational potential, Cold dark matter, History and Philosophy of Science, General Neuroscience, Gravitational effect, Cosmic microwave background, Astrophysics::Cosmology and Extragalactic Astrophysics, Decoupling (cosmology), Astrophysics, Anisotropy, General Biochemistry, Genetics and Molecular Biology, Galaxy
Abstract

We review the relevant physical mechanisms that can alter, or even erase, the primary anisotropies in the CMB present at the decoupling surface in the standard scenario. Special emphasis is put on the non-linear gravitational effect which provides the minimal anisotropy in the CMB generated by the present distribution of galaxies.

Published
2015

8. Planck Intermediate Results. IV. The XMM-Newton validation programme for new Planck clusters

Author

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. Balbi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, E. Battaner, K. Benabed, A. Benoît, J. P. Bernard, M. Bersanelli, I. Bikmaev, H. Böhringer, A. Bonaldi, J. R. Bond, J. Borrill, F. R. Bouchet, M. L. Brown, C. Burigana, R. C. Butler, P. Cabella, P. Carvalho, A. Catalano, L. Cayón, A. Chamballu, R. R. Chary, L. Y. Chiang, G. Chon, P. R. Christensen, D. L. Clements, S. Colafrancesco, S. Colombi, A. Coulais, B. P. Crill, F. Cuttaia, A. Da Silva, H. Dahle, R. J. Davis, P. de Bernardis, G. de Gasperis, G. de Zotti, J. Delabrouille, J. Démoclès, F. X. Désert, J. M. Diego, K. Dolag, H. Dole, S. Donzelli, O. Doré, M. Douspis, X. Dupac, T. A. Enßlin, H. K. Eriksen, F. Finelli, I. Flores Cacho, O. Forni, M. Frailis, E. Franceschi, M. Frommert, S. Galeotta, K. Ganga, R. T. Génova Santos, Y. Giraud Héraud, J. González Nuevo, R. González Riestra, K. M. Górski, A. Gruppuso, F. K. Hansen, D. Harrison, A. Hempel, S. Henrot Versillé, C. Hernández Monteagudo, D. Herranz, S. R. Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, A. Hornstrup, W. Hovest, K. M. Huffenberger, G. Hurier, A. H. Jaffe, T. Jagemann, W. C. Jones, M. Juvela, R. Kneissl, J. Knoche, L. Knox, M. Kunz, H. Kurki Suonio, G. Lagache, J. M. Lamarre, A. Lasenby, C. R. Lawrence, M. Le Jeune, S. Leach, R. Leonardi, A. Liddle, P. B. Lilje, M. Linden Vørnle, M. López Caniego, G. Luzzi, J. F. Macías Pérez, D. Maino, N. Mandolesi, R. Mann, M. Maris, F. Marleau, D. J. Marshall, E. Martínez González, S. Masi, M. Massardi, S. Matarrese, P. Mazzotta, S. Mei, P. R. Meinhold, A. Melchiorri, J. B. Melin, L. Mendes, A. Mennella, S. Mitra, M. A. Miville Deschênes, A. Moneti, G. Morgante, D. Mortlock, D. Munshi, P. Naselsky, F. Nati, P. Natoli, H. U. Nørgaard Nielsen, F. Noviello, S. Osborne, F. Pajot, D. Paoletti, O. Perdereau, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, R. Piffaretti, S. Plaszczynski, P. Platania, E. Pointecouteau, G. Polenta, L. Popa, T. Poutanen, G. W. Pratt, S. Prunet, J. L. Puget, M. Reinecke, M. Remazeilles, C. Renault, S. Ricciardi, G. Rocha, C. Rosset, M. Rossetti, J. A. Rubiño Martín, B. Rusholme, M. Sandri, G. Savini, D. Scott, G. F. Smoot, A. Stanford, F. Stivoli, R. Sudiwala, R. Sunyaev, D. Sutton, A. S. Suur Uski, J. F. Sygnet, J. A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tristram, L. Valenziano, B. Van Tent, P. Vielva, F. Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, N. Welikala, J. Weller, S. D. M. White, D. Yvon, A. Zacchei, A. Zonca, BORGANI, STEFANO, GREGORIO, ANNA, P. A. R., Ade, N., Aghanim, M., Arnaud, M., Ashdown, J., Aumont, C., Baccigalupi, A., Balbi, A. J., Banday, R. B., Barreiro, J. G., Bartlett, E., Battaner, K., Benabed, A., Benoît, J. P., Bernard, M., Bersanelli, I., Bikmaev, H., Böhringer, A., Bonaldi, J. R., Bond, Borgani, Stefano, J., Borrill, F. R., Bouchet, M. L., Brown, C., Burigana, R. C., Butler, P., Cabella, P., Carvalho, A., Catalano, L., Cayón, A., Chamballu, R. R., Chary, L. Y., Chiang, G., Chon, P. R., Christensen, D. L., Clement, S., Colafrancesco, S., Colombi, A., Coulai, B. P., Crill, F., Cuttaia, A., Da Silva, H., Dahle, R. J., Davi, P., de Bernardi, G., de Gasperi, G., de Zotti, J., Delabrouille, J., Démoclè, F. X., Désert, J. M., Diego, K., Dolag, H., Dole, S., Donzelli, O., Doré, M., Douspi, X., Dupac, T. A., Enßlin, H. K., Eriksen, F., Finelli, I., Flores Cacho, O., Forni, M., Fraili, E., Franceschi, M., Frommert, S., Galeotta, K., Ganga, R. T., Génova Santo, Y., Giraud Héraud, J., González Nuevo, R., González Riestra, K. M., Górski, Gregorio, Anna, A., Gruppuso, F. K., Hansen, D., Harrison, A., Hempel, S., Henrot Versillé, C., Hernández Monteagudo, D., Herranz, S. R., Hildebrandt, E., Hivon, M., Hobson, W. A., Holme, A., Hornstrup, W., Hovest, K. M., Huffenberger, G., Hurier, A. H., Jaffe, T., Jagemann, W. C., Jone, M., Juvela, R., Kneissl, J., Knoche, L., Knox, M., Kunz, H., Kurki Suonio, G., Lagache, J. M., Lamarre, A., Lasenby, C. R., Lawrence, M., Le Jeune, S., Leach, R., Leonardi, A., Liddle, P. B., Lilje, M., Linden Vørnle, M., López Caniego, G., Luzzi, J. F., Macías Pérez, D., Maino, N., Mandolesi, R., Mann, M., Mari, F., Marleau, D. J., Marshall, E., Martínez González, S., Masi, M., Massardi, S., Matarrese, P., Mazzotta, S., Mei, P. R., Meinhold, A., Melchiorri, J. B., Melin, L., Mende, A., Mennella, S., Mitra, M. A., Miville Deschêne, A., Moneti, G., Morgante, D., Mortlock, D., Munshi, P., Naselsky, F., Nati, P., Natoli, H. U., Nørgaard Nielsen, F., Noviello, S., Osborne, F., Pajot, D., Paoletti, O., Perdereau, F., Perrotta, F., Piacentini, M., Piat, E., Pierpaoli, R., Piffaretti, S., Plaszczynski, P., Platania, E., Pointecouteau, G., Polenta, L., Popa, T., Poutanen, G. W., Pratt, S., Prunet, J. L., Puget, M., Reinecke, M., Remazeille, C., Renault, S., Ricciardi, G., Rocha, C., Rosset, M., Rossetti, J. A., Rubiño Martín, B., Rusholme, M., Sandri, G., Savini, D., Scott, G. F., Smoot, A., Stanford, F., Stivoli, R., Sudiwala, R., Sunyaev, D., Sutton, A. S., Suur Uski, J. F., Sygnet, J. A., Tauber, L., Terenzi, L., Toffolatti, M., Tomasi, M., Tristram, L., Valenziano, B., Van Tent, P., Vielva, F., Villa, N., Vittorio, L. A., Wade, B. D., Wandelt, N., Welikala, J., Weller, S. D. M., White, D., Yvon, A., Zacchei, and A., Zonca

Subjects
galaxies: clusters: intracluster medium, clusters: intracluster medium [galaxies], galaxies: clusters: general, cosmology: observations, X-rays: galaxies: clusters, clusters: general [galaxies], galaxies: clusters [X-rays], cosmic background radiation, observation [cosmology]
Abstract

We present the final results from the XMM-Newton validation follow-up of new Planck galaxy cluster candidates. We observed 15 new candidates, detected with signal-to-noise ratios between 4.0 and 6.1 in the 15.5-month nominal Planck survey. The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digitized Sky Survey all-sky maps, with the aim of pushing into the low SZ flux, high-z regime and testing RASS flags as indicators of candidate reliability. Fourteen new clusters were detected by XMM-Newton, ten single clusters and two double systems. Redshifts from X-ray spectroscopy lie in the range 0.2 to 0.9, with six clusters at z > 0.5. Estimated masses (M500) range from 2.5 × 1014 to 8 × 1014 M⊙. We discuss our results in the context of the full XMM-Newton validation programme, in which 51 new clusters have been detected. This includes four double and two triple systems, some of which are chance projections on the sky of clusters at different redshifts. We find thatassociation with a source from the RASS-Bright Source Catalogue is a robust indicator of the reliability of a candidate, whereas association with a source from the RASS-Faint Source Catalogue does not guarantee that the SZ candidate is a bona fide cluster. Nevertheless, most Planck clusters appear in RASS maps, with a significance greater than 2σ being a good indication that the candidate is a real cluster. Candidate validation from association with SDSS galaxy overdensity at z > 0.5 is also discussed. The full sample gives a Planck sensitivity threshold of Y500 ~ 4 × 10-4 arcmin2, with indication for Malmquist bias in the YX-Y500 relation below this threshold. The corresponding mass threshold depends on redshift. Systems with M500 > 5 × 1014 M⊙ at z > 0.5 are easily detectable with Planck. The newly-detected clusters follow the YX-Y500 relation derived from X-ray selected samples. Compared to X-ray selected clusters, the new SZ clusters have a lower X-ray luminosity on average for their mass. There is no indication of departure from standard self-similar evolution in the X-ray versus SZ scaling properties. In particular, there is no significant evolution of the YX / Y500 ratio.

Published
2013

9. Planckintermediate results(Corrigendum)

Author

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, F. Atrio Barandela, J. Aumont, C. Baccigalupi, A. Balbi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, E. Battaner, K. Benabed, A. Benoît, J. P. Bernard, M. Bersanelli, R. Bhatia, I. Bikmaev, J. Bobin, H. Böhringer, A. Bonaldi, J. R. Bond, J. Borrill, F. R. Bouchet, H. Bourdin, M. L. Brown, R. Burenin, C. Burigana, P. Cabella, J. F. Cardoso, P. Carvalho, G. Castex, A. Catalano, L. Cayón, A. Chamballu, L. Y. Chiang, G. Chon, P. R. Christensen, E. Churazov, D. L. Clements, S. Colafrancesco, S. Colombi, L. P. L. Colombo, B. Comis, A. Coulais, B. P. Crill, F. Cuttaia, A. Da Silva, H. Dahle, L. Danese, R. J. Davis, P. de Bernardis, G. de Gasperis, G. de Zotti, J. Delabrouille, J. Démoclès, F. X. Désert, J. M. Diego, K. Dolag, H. Dole, S. Donzelli, O. Doré, U. Dörl, M. Douspis, X. Dupac, G. Efstathiou, T. A. Enßlin, H. K. Eriksen, F. Finelli, I. Flores Cacho, O. Forni, P. Fosalba, M. Frailis, E. Franceschi, M. Frommert, S. Galeotta, K. Ganga, R. T. Génova Santos, M. Giard, Y. Giraud Héraud, J. González Nuevo, K. M. Górski, GREGORIO, ANNA, A. Gruppuso, F. K. Hansen, D. Harrison, A. Hempel, S. Henrot Versillé, C. Hernández Monteagudo, D. Herranz, S. R. Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, G. Hurier, T. R. Jaffe, A. H. Jaffe, T. Jagemann, W. C. Jones, M. Juvela, E. Keihänen, I. Khamitov, T. S. Kisner, R. Kneissl, J. Knoche, L. Knox, M. Kunz, H. Kurki Suonio, G. Lagache, A. Lähteenmäki, J. M. Lamarre, A. Lasenby, C. R. Lawrence, M. Le Jeune, R. Leonardi, A. Liddle, P. B. Lilje, M. López Caniego, G. Luzzi, J. F. Macías Pérez, D. Maino, N. Mandolesi, M. Maris, F. Marleau, D. J. Marshall, E. Martínez González, S. Masi, M. Massardi, S. Matarrese, P. Mazzotta, S. Mei, A. Melchiorri, J. B. Melin, L. Mendes, A. Mennella, S. Mitra, M. A. Miville Deschênes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, J. A. Murphy, P. Naselsky, F. Nati, P. Natoli, H. U. Nørgaard Nielsen, F. Noviello, D. Novikov, I. Novikov, S. Osborne, F. Pajot, D. Paoletti, F. Pasian, G. Patanchon, O. Perdereau, L. Perotto, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, R. Piffaretti, S. Plaszczynski, E. Pointecouteau, G. Polenta, N. Ponthieu, L. Popa, T. Poutanen, G. W. Pratt, S. Prunet, J. L. Puget, J. P. Rachen, W. T. Reach, R. Rebolo, M. Reinecke, M. Remazeilles, C. Renault, S. Ricciardi, T. Riller, I. Ristorcelli, G. Rocha, M. Roman, C. Rosset, M. Rossetti, J. A. Rubiño Martín, B. Rusholme, M. Sandri, G. Savini, D. Scott, G. F. Smoot, J. L. Starck, R. Sudiwala, R. Sunyaev, D. Sutton, A. S. Suur Uski, J. F. Sygnet, J. A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tristram, J. Tuovinen, L. Valenziano, B. Van Tent, J. Varis, P. Vielva, F. Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, N. Welikala, S. D. M. White, M. White, D. Yvon, A. Zacchei, A. Zonca, BORGANI, STEFANO, P. A. R., Ade, N., Aghanim, M., Arnaud, M., Ashdown, F., Atrio Barandela, J., Aumont, C., Baccigalupi, A., Balbi, A. J., Banday, R. B., Barreiro, J. G., Bartlett, E., Battaner, K., Benabed, A., Benoît, J. P., Bernard, M., Bersanelli, R., Bhatia, I., Bikmaev, J., Bobin, H., Böhringer, A., Bonaldi, J. R., Bond, Borgani, Stefano, J., Borrill, F. R., Bouchet, H., Bourdin, M. L., Brown, R., Burenin, C., Burigana, P., Cabella, J. F., Cardoso, P., Carvalho, G., Castex, A., Catalano, L., Cayón, A., Chamballu, L. Y., Chiang, G., Chon, P. R., Christensen, E., Churazov, D. L., Clement, S., Colafrancesco, S., Colombi, L. P. L., Colombo, B., Comi, A., Coulai, B. P., Crill, F., Cuttaia, A., Da Silva, H., Dahle, L., Danese, R. J., Davi, P., de Bernardi, G., de Gasperi, G., de Zotti, J., Delabrouille, J., Démoclè, F. X., Désert, J. M., Diego, K., Dolag, H., Dole, S., Donzelli, O., Doré, U., Dörl, M., Douspi, X., Dupac, G., Efstathiou, T. A., Enßlin, H. K., Eriksen, F., Finelli, I., Flores Cacho, O., Forni, P., Fosalba, M., Fraili, E., Franceschi, M., Frommert, S., Galeotta, K., Ganga, R. T., Génova Santo, M., Giard, Y., Giraud Héraud, J., González Nuevo, K. M., Górski, Gregorio, Anna, A., Gruppuso, F. K., Hansen, D., Harrison, A., Hempel, S., Henrot Versillé, C., Hernández Monteagudo, D., Herranz, S. R., Hildebrandt, E., Hivon, M., Hobson, W. A., Holme, G., Hurier, T. R., Jaffe, A. H., Jaffe, T., Jagemann, W. C., Jone, M., Juvela, E., Keihänen, I., Khamitov, T. S., Kisner, R., Kneissl, J., Knoche, L., Knox, M., Kunz, H., Kurki Suonio, G., Lagache, A., Lähteenmäki, J. M., Lamarre, A., Lasenby, C. R., Lawrence, M., Le Jeune, R., Leonardi, A., Liddle, P. B., Lilje, M., López Caniego, G., Luzzi, J. F., Macías Pérez, D., Maino, N., Mandolesi, M., Mari, F., Marleau, D. J., Marshall, E., Martínez González, S., Masi, M., Massardi, S., Matarrese, P., Mazzotta, S., Mei, A., Melchiorri, J. B., Melin, L., Mende, A., Mennella, S., Mitra, M. A., Miville Deschêne, A., Moneti, L., Montier, G., Morgante, D., Mortlock, D., Munshi, J. A., Murphy, P., Naselsky, F., Nati, P., Natoli, H. U., Nørgaard Nielsen, F., Noviello, D., Novikov, I., Novikov, S., Osborne, F., Pajot, D., Paoletti, F., Pasian, G., Patanchon, O., Perdereau, L., Perotto, F., Perrotta, F., Piacentini, M., Piat, E., Pierpaoli, R., Piffaretti, S., Plaszczynski, E., Pointecouteau, G., Polenta, N., Ponthieu, L., Popa, T., Poutanen, G. W., Pratt, S., Prunet, J. L., Puget, J. P., Rachen, W. T., Reach, R., Rebolo, M., Reinecke, M., Remazeille, C., Renault, S., Ricciardi, T., Riller, I., Ristorcelli, G., Rocha, M., Roman, C., Rosset, M., Rossetti, J. A., Rubiño Martín, B., Rusholme, M., Sandri, G., Savini, D., Scott, G. F., Smoot, J. L., Starck, R., Sudiwala, R., Sunyaev, D., Sutton, A. S., Suur Uski, J. F., Sygnet, J. A., Tauber, L., Terenzi, L., Toffolatti, M., Tomasi, M., Tristram, J., Tuovinen, L., Valenziano, B., Van Tent, J., Vari, P., Vielva, F., Villa, N., Vittorio, L. A., Wade, B. D., Wandelt, N., Welikala, S. D. M., White, M., White, D., Yvon, A., Zacchei, and A., Zonca

Subjects
galaxies: clusters: intracluster medium, clusters: intracluster medium [galaxies], galaxies: clusters: general, general [X-rays], cosmology: observations, clusters: general [galaxies], submillimeter: general, general [submillimeter], X-rays: general, errata, addenda, observation [cosmology]
Published
2013

10. The non-Gaussian cold spot in WMAP

Author

M. Cruz, P. Vielva, Enrique Martínez-González, and L. Cayón

Subjects
Physics, Cold spot, media_common.quotation_subject, Gaussian, Cosmic microwave background, Astronomy, Astronomy and Astrophysics, Astrophysics, CMB cold spot, Cosmology, symbols.namesake, Wavelet, Space and Planetary Science, Sky, Position (vector), symbols, media_common
Abstract

We review the properties of the non-Gaussian cold spot found in the WMAP data. The spot, which was first found in the WMAP 1-year data at position (b = −57°, l = 209°) and subtending ≈10° in the sky, has been now confirmed with the WMAP 3-year data. It is clearly detected with several different statistical methods acting on wavelet coefficients. The probability of finding such a spot in Gaussian simulations is around 1%. The frequency dependence of the spot is flat at a very high precision, rejecting the possibility of being due to the Sunyaev–Zeldovich effect or Galactic foregrounds. Finally, we discuss different possibilities which can help to explain its origin.

Published
2006

11. No Higher Criticism of the Bianchi-corrected Wilkinson Microwave Anisotropy Probe data

Author

L. Cayón, A. J. Banday, T. Jaffe, H. K. Eriksen, F. K. Hansen, K. M. Gorski, and J. Jin

Subjects
Physics, Gaussian, Astronomy and Astrophysics, Scale (descriptive set theory), Astrophysics, Space (mathematics), CMB cold spot, symbols.namesake, Wavelet, Space and Planetary Science, symbols, Kurtosis, Scaling, Statistic
Abstract

Motivated by the success of the Bianchi V IIh model in addressing many of the anomalies observed in the WMAP data (Jaffe et al.), we present calculations in real and in wavelet space of the Higher Criticism statistic of the Bianchi corrected Wilkinson Microwave Anisotropy Probe (WMAP) first year data. At the wavelet scale of 5 degrees the Higher Criticism of the WMAP map drops from a value above the 99% c.l. to a value below the 68% c.l. when corrected by the Bianchi template. An important property of the Higher Criticism statistic is its ability to locate the pixels that account for the deviation from Gaussianity. The analysis of the uncorrected WMAP data pointed to a cold spot in the southern hemisphere centered at l � 209 ◦ , b � 57 ◦ . The Higher Criticism of the Bianchi corrected map indicates that this spot remains prominent, albeit at a level completely consistent with Gaussian statistics. Consequently, it is debatable how much emphasis should be placed on this residual feature, but we consider the effect of modestly increasing the scaling of the template. A factor of only 1.2 renders the spot indistinguishable from the background level, with no noticeable impact on the results published in Jaffe et al. for the low-l anomalies, large-scale power asymmetry or wavelet kurtosis. A trivial interpretation would be that the Bianchi template may require a small enhancement of power on scales corresponding to the wavelet scale of 5 degrees.

Published
2006

12. Higher Criticism statistic: detecting and identifying non-Gaussianity in the WMAP first-year data

Author

L. Cayón, A. Treaster, and Jiashun Jin

Subjects
Physics, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Scale (descriptive set theory), Astrophysics, Approx, CMB cold spot, Wavelet, Space and Planetary Science, Non-Gaussianity, Criticism, Statistic, Confidence region
Abstract

Higher Criticism is a recently developed statistic for non-Gaussian detection, proposed in Donoho & Jin 2004. We find that Higher Criticism is useful for two purposes. First, Higher Criticism has competitive detection power, and non-Gaussianity is detected at the level 99% in the first year WMAP data. We find that the Higher Criticism value of WMAP is outside the 99% confidence region at a wavelet scale of 5 degrees (99.46% of Higher Criticism values based on simulated maps are below the values for WMAP). Second, Higher Criticism offers a way to locate a small portion of data that accounts for the non-Gaussianity. Using Higher Criticism, we have successfully identified a ring of pixels centered at (l\approx 209 deg, b\approx -57 deg), which seems to account for the observed detection of non-Gaussianity at the wavelet scale of 5 degrees. Note that the detection is achieved in wavelet space first. Second, it is always possible that a fraction of pixels within the ring might deviate from Gaussianity even if they do not appear to be above the 99% confidence level in wavelet space. The location of the ring coincides with the cold spot detected in Vielva et al. 2004 and Cruz et al. 2005., submitted to MNRAS

Published
2005

13. Detection of a non-Gaussian spot in WMAP

Author

M. Cruz, E. Martínez-González, L. Cayón, P. Vielva, Physique Corpusculaire et Cosmologie - Collège de France (PCC), and Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
cosmic microwave background, media_common.quotation_subject, Gaussian, Cosmic microwave background, Cosmic background radiation, FOS: Physical sciences, Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, 0103 physical sciences, method: data analysis, 010303 astronomy & astrophysics, media_common, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Spots, 010308 nuclear & particles physics, Astrophysics (astro-ph), Mexican hat wavelet, Astronomy and Astrophysics, CMB cold spot, Space and Planetary Science, Sky, symbols, Maxima
Abstract

An extremely cold and big spot in the WMAP 1-year data is analyzed. Our work is a continuation of a previous paper (Vielva et al. 2004) where non-Gaussianity was detected, with a method based on the Spherical Mexican Hat Wavelet (SMHW) technique. We study the spots at different thresholds on the SMHW coefficient maps, considering six estimators, namely number of maxima, number of minima, number of hot and cold spots, and number of pixels of the spots. At SMHW scales around 4 degrees (10 degrees on the sky), the data deviate from Gaussianity. The analysis is performed on all sky, the northern and southern hemispheres, and on four regions covering all the sky. A cold spot at (b = -57, l = 209) is found to be the source of this non-Gaussian signature. We compare the spots of our data with 10000 Gaussian simulations, and conclude that only around 0.2% of them present such a cold spot. Excluding this spot, the remaining map is compatible with Gaussianity and even the excess of kurtosis in Vielva et al. 2004, is found to be due exclusively to this spot. Finally, we study whether the spot causing the observed deviation from Gaussianity could be generated by systematics or foregrounds. None of them seem to be responsible for the non-Gaussian detection., 14 pages, references and two new sections (4.4, 5.3) added, accepted for publication in MNRAS

Published
2005

14. Detection of Non‐Gaussianity in theWilkinson Microwave Anisotropy ProbeFirst‐Year Data Using Spherical Wavelets

Author

J. L. Sanz, L. Cayón, R. B. Barreiro, E. Martínez-González, and P. Vielva

Subjects
Physics, Gaussian, Cosmic microwave background, Mexican hat wavelet, Spectral density, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, CMB cold spot, symbols.namesake, Wavelet, Space and Planetary Science, Non-Gaussianity, Kurtosis, symbols
Abstract

A non-Gaussian detection in the WMAP 1-year data is reported. The detection has been found in the combined Q-V-W map proposed by the WMAP team (Komatsu et al. 2003) after applying a wavelet technique based on the Spherical Mexican Hat Wavelet (SMHW). The skewness and the kurtosis of the SMHW coefficients are calculated at different scales. A non-Gaussian signal is detected at scales of the SMHW around 4 deg (size in the sky of around 10 deg). The right tail probability of the detection is approx. 0.4%. In addition, a study of Gaussianity is performed in each hemisphere. The northern hemisphere is compatible with Gaussianity, whereas the southern one deviates from Gaussianity with a right tail probability of approx. 0.1%. Systematics, foregrounds and uncertainties in the estimation of the cosmological parameters are carefully studied in order to identify the possible source of non-Gaussianity. The detected deviation from Gaussianity is not found to be caused by systematic effects: 1) each one of the Q, V and W receivers shows the same non-Gaussianity pattern, and 2) several combinations of the different receivers at each frequency band do not show this non-Gaussian pattern. Similarly, galactic foregrounds show a negligible contribution to the non-Gaussian detection: non-Gaussianity is detected in all the WMAP maps and no frequency dependence is observed. Moreover, the expected foreground contribution to the combined WMAP map was added to CMB Gaussian simulations showing a behaviour compatible with the Gaussian model. Influence of uncertainties in the CMB power spectrum estimation are also quantified. Hence, possible intrinsic temperature fluctuations (like secondary anisotropies and primordial features) can not be rejected as the source of this non-Gaussian detection.

Published
2004

15. Goodness-of-fit tests of Gaussianity: constraints on the cumulants of the MAXIMA data

Author

L. Cayón, R. B. Barreiro, J. L. Sanz, Enrique Martínez-González, Antonio M. Aliaga, and Francisco Argüeso

Subjects
Physics, Gaussian, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Probability density function, Edgeworth series, Astrophysics, symbols.namesake, Goodness of fit, Space and Planetary Science, Skewness, symbols, Kurtosis, Statistical physics, Maxima, Independence (probability theory)
Abstract

In this work, goodness-of-fit tests are adapted and applied to CMB maps to detect possible non-Gaussianity. We use Shapiro-Francia test and two Smooth goodness-of-fit tests: one developed by Rayner and Best and another one developed by Thomas and Pierce. The Smooth tests test small and smooth deviations of a prefixed probability function (in our case this is the univariate Gaussian). Also, the Rayner and Best test informs us of the kind of non-Gaussianity we have: excess of skewness, of kurtosis, and so on. These tests are optimal when the data are independent. We simulate and analyse non-Gaussian signals in order to study the power of these tests. These non-Gaussian simulations are constructed using the Edgeworth expansion, and assuming pixel-to-pixel independence. As an application, we test the Gaussianity of the MAXIMA data. Results indicate that the MAXIMA data are compatible with Gaussianity. Finally, the values of the skewness and kurtosis of MAXIMA data are constrained by |S| \le 0.035 and |K| \le 0.036 at the 99% confidence level., New Astronomy Reviews, in press

Published
2003

16. Goodness-of-fit tests to study the Gaussianity of the MAXIMA data

Author

Enrique Martínez-González, L. Cayón, J. L. Sanz, and Francisco Argüeso

Subjects
Physics, Gaussian, Astrophysics (astro-ph), Cosmic microwave background, Univariate, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Edgeworth series, symbols.namesake, Goodness of fit, Space and Planetary Science, symbols, Statistical physics, Maxima, Independence (probability theory), Cholesky decomposition
Abstract

Goodness-of-Fit tests, including Smooth ones, are introduced and applied to detect non-Gaussianity in Cosmic Microwave Background simulations. We study the power of three different tests: the Shapiro-Francia test (1972), the uncategorised smooth test developed by Rayner and Best(1990) and the Neyman's Smooth Goodness-of-fit test for composite hypotheses (Thomas and Pierce 1979). The Smooth Goodness-of-Fit tests are designed to be sensitive to the presence of ``smooth'' deviations from a given distribution. We study the power of these tests based on the discrimination between Gaussian and non-Gaussian simulations. Non-Gaussian cases are simulated using the Edgeworth expansion and assuming pixel-to-pixel independence. Results show these tests behave similarly and are more powerful than tests directly based on cumulants of order 3, 4, 5 and 6. We have applied these tests to the released MAXIMA data. The applied tests are built to be powerful against detecting deviations from univariate Gaussianity. The Cholesky matrix corresponding to signal (based on an assumed cosmological model) plus noise is used to decorrelate the observations previous to the analysis. Results indicate that the MAXIMA data are compatible with Gaussianity., Comment: MNRAS, in press

Published
2003

17. COBE—DMR constraints on the non-linear coupling parameter: a wavelet based method

Author

L. Cayón, K. M. Górski, E. Martínez-González, A. J. Banday, and Francisco Argüeso

Subjects
Physics, Astrophysics (astro-ph), Cosmic microwave background, Mathematical analysis, Mexican hat wavelet, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Linear discriminant analysis, Nonlinear system, Quadratic equation, Wavelet, Space and Planetary Science, Skewness, Bispectrum
Abstract

Nonlinearity introduced in slow-roll inflation will produce weakly non-Gaussian CMB temperature fluctuations. We have simulated non-Gaussian large scale CMB maps (including COBE-DMR constraints) introducing an additional quadratic term in the gravitational potential.The amount of nonlinearity being controlled by the so called nonlinear coupling parameter f_{nl}. An analysis based on the Spherical Mexican Hat wavelet was applied to these and to the COBE-DMR maps. Skewness values obtained at several scales were combined into a Fisher discriminant. Comparison of the Fisher discriminant distributions obtained for different nonlinear coupling parameters with the COBE-DMR values, sets a constraint of abs(f_{nl}), accepted for publication in MNRAS

Published
2003

18. The performance of spherical wavelets to detect non-Gaussianity in the cosmic microwave background sky

Author

J. L. Sanz, E. Martínez-González, J. E. Gallegos, Francisco Argüeso, and L. Cayón

Subjects
Physics, Gaussian, Astronomy and Astrophysics, White noise, Astrophysics, Edgeworth series, Linear discriminant analysis, symbols.namesake, Wavelet, Space and Planetary Science, Skewness, Non-Gaussianity, Kurtosis, symbols, Statistical physics
Abstract

We investigate the performance of spherical wavelets in discriminating between standard inflationary models (Gaussian) and non-Gaussian models. For the later we consider small perturbations of the Gaussian model in which an artificially specified skewness or kurtosis is introduced through the Edgeworth expansion. By combining all the information present in all the wavelet scales with the Fisher discriminant, we find that the spherical Mexican Hat wavelets are clearly superior to the spherical Haar wavelets. The former can detect levels of the skewness and kurtosis of ~1% for 33' resolution, an order of magnitude smaller than the later. Also, as expected, both wavelets are better for discriminating between the models than the direct consideration of moments of the temperature maps. The introduction of instrumental white noise in the maps, S/N=1, does not change the main results of this paper.

Published
2002

19. Wavelet imaging cleaning method for atmospheric Cherenkov telescopes

Author

G. H. Sembroski, R. W. Lessard, L. Cayón, and J. A. Gaidos

Subjects
Physics, Pixel, Physics::Instrumentation and Detectors, business.industry, Noise (signal processing), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Image processing, Astrophysics, law.invention, Telescope, Optics, Air shower, Wavelet, law, Computer Science::Computer Vision and Pattern Recognition, Angular resolution, business, Cherenkov radiation
Abstract

We present a new method of image cleaning for imaging atmospheric Cherenkov telescopes. The method is based on the utilization of wavelets to identify noise pixels in images of gamma-ray and hadronic induced air showers. This method selects more signal pixels with Cherenkov photons than traditional image processing techniques. In addition, the method is equally efficient at rejecting pixels with noise alone. The inclusion of more signal pixels in an image of an air shower allows for a more accurate reconstruction, especially at lower gamma-ray energies that produce low levels of light. We present the results of Monte Carlo simulations of gamma-ray and hadronic air showers which show improved angular resolution using this cleaning procedure. Data from the Whipple Observatory's 10-m telescope are utilized to show the efficacy of the method for extracting a gamma-ray signal from the background of hadronic generated images., Comment: to be published in Astroparticle Physics

Published
2002

20. Predicted Planck extragalactic point-source catalogue

Author

L. Toffolatti, Enrique Martínez-González, L. Cayón, Jose M. Diego, J. L. Sanz, and P. Vielva

Subjects
Physics, Point source, Astrophysics (astro-ph), Mexican hat wavelet, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Formalism (philosophy of mathematics), symbols.namesake, Amplitude, Space and Planetary Science, symbols, Planck
Abstract

An estimation of the number and amplitude (in flux) of the extragalactic point sources that will be observed by the Planck Mission is presented in this paper. The study is based on the Mexican Hat wavelet formalism introduced by Cayon et al. 2000. Simulations at Planck observing frequencies are analysed, taking into account all the possible cosmological, Galactic and Extragalactic emissions together with noise. With the technique used in this work the Planck Mission will produce a catalogue of extragalactic point sources above fluxes: 1.03 Jy (857 GHz), 0.53 Jy (545 GHz), 0.28 Jy (353 GHz), 0.24 Jy (217 GHz), 0.32 Jy (143 GHz), 0.41 Jy (100 GHz HFI), 0.34 Jy (100 GHz LFI), 0.57 Jy (70 GHz), 0.54 Jy (44 GHz) and 0.54 Jy (30 GHz), which are only slightly model dependent (see text). Amplitudes of these sources are estimated with errors below 15%. Moreover, we also provide a complete catalogue (for the point sources simulation analysed) with errors in the estimation of the amplitude below 10%. In addition we discuss the possibility of identifying different point source populations in the Planck catalogue by estimating their spectral indices., Comment: 13 pages, 2 figures, submitted to MNRAS

Published
2001

21. A Look At Three Different Scenarios for Bulge Formation

Author

Joseph Silk, L. Cayón, and Rychard Bouwens

Subjects
Physics, Astrophysics (astro-ph), Astronomy, FOS: Physical sciences, Collapse (topology), Secular evolution, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Space and Planetary Science, Bulge, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

In this paper, we present three qualitatively different scenarios for bulge formation: a secular evolution model in which bulges form after disks and undergo several central starbursts, a primordial collapse model in which bulges and disks form simultaneously, and an early bulge formation model in which bulges form prior to disks. We normalize our models to the local z=0 observations of de Jong & van der Kruit (1994) and Peletier & Balcells (1996) and make comparisons with high redshift observations. We consider model predictions relating directly to bulge-to-disk properties. As expected, smaller bulge-to-disk ratios and bluer bulge colors are predicted by the secular evolution model at all redshifts, although uncertainties in the data are currently too large to differentiate strongly between the models., 19 pages, 6 figures, accepted for publication in the Astrophysical Journal

Published
1999

22. Planck intermediate results (Corrigendum). V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect

Author

T. Riller, A. Hempel, Elena Pierpaoli, M. Ashdown, H. K. Eriksen, N. Ponthieu, Jean-François Cardoso, Barbara Comis, X. Dupac, E. Churazov, G. Chon, L. Montier, Guilaine Lagache, M. Giard, F. Noviello, M. Arnaud, G. Polenta, L. Cayón, L. Toffolatti, A. Moneti, Federico Nati, Alessandro Gruppuso, Luca Terenzi, Ricardo Génova-Santos, B. P. Crill, Lung-Yih Chiang, M. López-Caniego, G. Castex, Paolo Cabella, C. Renault, U. Dörl, Anthony Lasenby, Stefano Borgani, M. Sandri, Francine R. Marleau, E. Keihänen, C. Hernández-Monteagudo, J. R. Bond, M. Frailis, Carlo Baccigalupi, Francesca Perrotta, J.-P. Bernard, L. Popa, Peter A. R. Ade, S. Osborne, E. Hivon, Nicola Vittorio, Julian Borrill, Daniel J. Mortlock, J. Aumont, Torsten A. Enßlin, Hannu Kurki-Suonio, Sophie Henrot-Versille, B. Van Tent, D. J. Marshall, J.-F. Sygnet, F. Cuttaia, A. J. Banday, Charles R. Lawrence, Matthieu Roman, Olivier Forni, W. C. Jones, Alain Benoit, Michael P. Hobson, I. Flores-Cacho, Lloyd Knox, David L. Clements, Jean-Loup Puget, T. Jagemann, W. A. Holmes, Karim Benabed, O. Perdereau, Klaus Dolag, Alessandro Melchiorri, Jose M. Diego, Michael L. Brown, Y. Giraud-Héraud, R. A. Burenin, Luca Valenziano, I. D. Novikov, Paolo Natoli, R. Leonardi, C. Rosset, F. K. Hansen, Marc-Antoine Miville-Deschênes, B. Rusholme, Herve Dole, D. L. Harrison, Andrew R. Liddle, S. Donzelli, Sabino Matarrese, F. Piacentini, I. Ristorcelli, Subhasish Mitra, M. Frommert, Pavel Naselsky, R. J. Davis, Giorgio Savini, Jean-Baptiste Melin, A. Coulais, A. Catalano, Marian Douspis, Anna Bonaldi, Mika Juvela, Andrea Zacchei, Martin Reinecke, I. F. Bikmaev, S. Ricciardi, Rashmikant V. Sudiwala, Michele Maris, Sergio Colafrancesco, J. A. Tauber, Niraj Welikala, Jose Alberto Rubino-Martin, Jussi Varis, William T. Reach, P. Carvalho, E. Franceschi, R. B. Barreiro, R. Piffaretti, J.-M. Lamarre, D. Sutton, T. Poutanen, P. de Bernardis, Hervé Bourdin, G. Hurier, G. W. Pratt, Jörg P. Rachen, Hans Böhringer, Gianluca Morgante, Simon D. M. White, Fernando Atrio-Barandela, A. Mennella, Nabila Aghanim, George F. Smoot, Luigi Danese, J. González-Nuevo, Matthieu Tristram, G. de Zotti, Theodore Kisner, G. Luzzi, Pasquale Mazzotta, Fabio Pasian, R. A. Sunyaev, Hans Ulrik Nørgaard-Nielsen, Silvia Masi, F. Pajot, Anne Lähteenmäki, F.-X. Désert, R. Bhatia, P. Vielva, J. Démoclès, S. R. Hildebrandt, D. Herranz, M. Le Jeune, R. Kneissl, G. Patanchon, Marcella Massardi, Jean-Luc Starck, A.-S. Suur-Uski, S. Galeotta, Martin White, Douglas Scott, Ken Ganga, Krzysztof M. Gorski, P. R. Christensen, B. D. Wandelt, J. F. Macías-Pérez, E. Martínez-González, N. Mandolesi, G. de Gasperis, Stéphane Colombi, Pablo Fosalba, Andrew H. Jaffe, Irek Khamitov, M. Piat, J. Knoche, Rafael Rebolo, E. Battaner, Etienne Pointecouteau, Graca Rocha, M. Tomasi, A. Da Silva, F. R. Bouchet, F. Villa, Carlo Burigana, Marco Bersanelli, L. Mendes, M. Rossetti, Stéphane Plaszczynski, L. Perotto, Jussi Tuovinen, Jérôme Bobin, Davide Maino, A. Chamballu, Simona Mei, Jacques Delabrouille, J. A. Murphy, Simon Prunet, Amedeo Balbi, Fabio Finelli, T. R. Jaffe, James G. Bartlett, Martin Kunz, Mathieu Remazeilles, Lawrence A. Wade, Håkon Dahle, O. Doré, Andrea Zonca, A. Gregorio, P. B. Lilje, D. Yvon, L. P. L. Colombo, Dmitry Novikov, Daniela Paoletti, Dipak Munshi, and George Efstathiou

Subjects
Surface (mathematics), cosmology: observations, galaxies: clusters: general, galaxies: clusters: intracluster medium, submillimeter: general, X-rays: general, errata, addenda, Astrophysics, System of linear equations, 01 natural sciences, Matrix (mathematics), Settore FIS/05 - Astronomia e Astrofisica, Position (vector), errata: addenda, 0103 physical sciences, 010303 astronomy & astrophysics, Physics, submillimiter: general, cosmology: observations, galaxies: clusters: general, galaxies: clusters: intracluster medium, submillimeter: general, X-rays: general, errata, addenda, 010308 nuclear & particles physics, Scattering, Plane (geometry), Cosmology: observations, Galaxies: clusters: intracluster medium, X-Rays: General, Astronomy and Astrophysics, Transformation (function), Space and Planetary Science, addenda, errata, Gaussian optics
Abstract

We have developed an approximate technique, based on the principles of multi-mode Gaussian optics, for studying the behaviour of shaped off-axis mirrors. We describe a mirror as an inclined phase-transforming plane, where the phase transformation across the plane is determined by the depth of the mirror as a function of position. The scattering matrix is calculated in the usual way by evaluating the overlap integrals over some surface for which the amplitudes and phases of the incoming and outgoing fields are known; because, however, the modes are not orthogonal over the surface of interest, a system of linear equations has to be solved. We demonstrate the “thin-mirror” technique by studying the behaviour of paraboloidal and ellipsoidal mirros, and we show how the performance of measured and approximate surfaces can be assessed.

Published
2013

23. from the COBE-DMR anisotropy maps

Author

E. Martínez-González, Naonori S. Sugiyama, S. Torres, L. Cayón, and J. L. Sanz

Subjects
Physics, COSMIC cancer database, media_common.quotation_subject, Monte Carlo method, Spectral density, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Omega, Amplitude, Space and Planetary Science, Sky, Quadrupole, Anisotropy, media_common
Abstract

We have made a likelihood statistical analysis of the angular correlations in the {\it COBE}-DMR two-year sky maps by Monte Carlo simulation of the temperature fluctuations. We assume an open universe and consider as primordial power spectrum the Harrison-Zeldovich one, $P(k)=Ak$. We find that the flatness of the universe is not implied by the data. The quadrupole normalization amplitude, $Q_{rms-PS}$, is related to the density parameter, $\Omega$, by $Q_{rms-PS} = 10.67 + 55.81 \Omega - 128.59 \Omega^2 + 81.26 \Omega^3\ \mu$K. We have determined the p.d.f. of $\Omega$ due to cosmic plus sampling (i.e. $20^\circ$ galactic cut) variance which generically shows a bimodal shape. The uncertainty as given by the r.m.s. is $\approx 0.35$, therefore to better constrain $\Omega$ experiments sensitive to higher multipoles ($l>20$) should be considered.

Published
1996

24. Projected Clustering Around 1 < Z < 2 Radiogalaxies

Author

Narciso Benítez, L. Cayón, Enrique Martínez-González, and J. I. González-Serrano

Subjects
Physics, Astrophysics, Cluster analysis
Abstract

We have taken deepR-band images of fields around five radiogalaxies: 0956+47, 1217+36, 3C256, 3C324 and 3C294 with 1

Published
1996

25. Ω FROM THE COBE-DMR ANISOTROPY MAPS

Author

E. Martínez-González, J. L. Sanz, Naoshi Sugiyama, L. Cayón, and S. Torres

Subjects
Physics, History and Philosophy of Science, Condensed matter physics, General Neuroscience, Anisotropy, General Biochemistry, Genetics and Molecular Biology
Published
1995

26. Genus and spot density in the COBE-DMR first-year anisotropy maps

Author

J. L. Sanz, L. Cayón, S. Torres, and E. Martínez-González

Subjects
Physics, Spectral index, Astrophysics (astro-ph), Monte Carlo method, Cosmic microwave background, FOS: Physical sciences, Spectral density, Astronomy and Astrophysics, Cosmic variance, Astrophysics, Amplitude, Space and Planetary Science, Genus (mathematics), Statistical physics, Anisotropy
Abstract

A statistical analysis of texture on the {\it COBE}-DMR first year sky maps based on the genus and spot number is presented. A generalized $\chi^2$ statistic is defined in terms of ``observable'' quantities: the genus and spot density that would be measured by different cosmic observers. This strategy together with the use of Monte Carlo simulations of the temperature fluctuations, including all the relevant experimental parameters, represent the main difference with previous analyses. Based on the genus analysis we find a strong anticorrelation between the quadrupole amplitude $Q_{rms-PS}$ and the spectral index $n$ of the density fluctuation power spectrum at recombination of the form $Q_{rms-PS}= 22.2 \pm 1.7 - (4.7 \pm 1.3) \times n\ \mu$K for fixed $n$, consistent with previous works. The result obtained based on the spot density is consistent with this $Q_{rms-PS} (n)$ relation. In addition to the previous results we have determined, using Monte Carlo simulations, the minimum uncertainty due to cosmic variance for the determination of the spectral index with the genus analysis. This uncertainty is $\delta n\approx 0.2$., Comment: 5 pages, uuencode file containing text and 1 figure. MNRAS in press.

Published
1995

27. Planck Intermediate Results II: Comparison of Sunyaev-Zeldovich measurements from Planck and from the Arcminute Microkelvin Imager for 11 galaxy clusters

Author

P. A. R. Ade (82), N. Aghanim (56), M. Arnaud (72), M. Ashdown (69), 6, J. Aumont (56), C. Baccigalupi (81), A. Balbi (35), A. J. Banday (90, R. B. Barreiro (65), E. Battaner (92), R. Battye (68), K. Benabed (57, 89), A. Benoît (54), J.-P. Bernard (9), M. Bersanelli (32, 48), R. Bhatia (7), I. Bikmaev (20, H. Böhringer (77), A. Bonaldi (68), J. R. Bond (8), J. Borrill (14, 85), F. R. Bouchet (57, H. Bourdin (35), M. L. Brown (68), M. Bucher (1), R. Burenin (83), C. Burigana (47, 34), R. C. Butler (47), P. Cabella (36), P. Carvalho (6), A. Catalano (73, 71), L. Cayón (29), A. Chamballu (52), R.-R. Chary (53), L.-Y. Chiang (61), G. Chon (77), D. L. Clements (52), S. Colafrancesco (44), S. Colombi (57, A. Coulais (71), B. P. Crill (67, 79), F. Cuttaia (47), A. Da Silva (12), H. Dahle (63), R. D. Davies (68), R. J. Davis (68), P. de Bernardis (31), G. de Gasperis (35), A. de Rosa (47), G. de Zotti (43, 81), J. Delabrouille (1), J. Démoclès (72), C. Dickinson (68), J. M. Diego (65), K. Dolag (91, 76), H. Dole (56, 55), S. Donzelli (48), O. Doré (67, 10), M. Douspis (56), X. Dupac (40), G. Efstathiou (62), T. A. Enßlin (76), H. K. Eriksen (63), F. Feroz (6), F. Finelli (47), I. Flores-Cacho (9, 90), O. Forni (90, P. Fosalba (58), M. Frailis (45), E. Franceschi (47), S. Fromenteau (1, 56), S. Galeotta (45), K. Ganga (1), R. T. Génova-Santos (64), M. Giard (90, Y. Giraud-Héraud (1), J. González-Nuevo (65, K. M. Górski (67, 94), K. J. B. Grainge (6, 69), A. Gregorio (33, 45), A. Gruppuso (47), F. K. Hansen (63), D. Harrison (62, S. Henrot-Versillé (70), C. Hernández-Monteagudo (13, D. Herranz (65), S. R. Hildebrandt (10), E. Hivon (57, M. Hobson (6), W. A. Holmes (67), K. M. Huffenberger (93), G. Hurier (73), N. Hurley-Walker (6), T. Jagemann (40), M. Juvela (25), E. Keihänen (25), I. Khamitov (88), R. Kneissl (39, J. Knoche (76), M. Kunz (18, H. Kurki-Suonio (25, 42), G. Lagache (56), J.-M. Lamarre (71), A. Lasenby (6, C. R. Lawrence (67), M. Le Jeune (1), S. Leach (81), R. Leonardi (40), A. Liddle (24), P. B. Lilje (63, 11), M. Linden-Vørnle (17), M. López-Caniego (65), G. Luzzi (70), J. F. Macías-Pérez (73), C. J. MacTavish (69), D. Maino (32, N. Mandolesi (47, M. Maris (45), F. Marleau (60), D. J. Marshall (72), E. Martínez-González (65), S. Masi (31), M. Massardi (46), S. Matarrese (30), F. Matthai (76), P. Mazzotta (35), P. R. Meinhold (27), A. Melchiorri (31, 49), J.-B. Melin (16), L. Mendes (40), A. Mennella (32, S. Mitra (51, 67), M.-A. Miville-Deschênes (56, L. Montier (90, G. Morgante (47), D. Munshi (82), P. Naselsky (78, 37), P. Natoli (34, 4, 47), H. U. Nørgaard-Nielsen (17), F. Noviello (68), D. Novikov (52), I. Novikov (78), M. Olamaie (6), S. Osborne (87), F. Pajot (56), D. Paoletti (47), F. Pasian (45), G. Patanchon (1), T. J. Pearson (10, 53), O. Perdereau (70), Y. C. Perrott (6), F. Perrotta (81), F. Piacentini (31), E. Pierpaoli (23), P. Platania (66), E. Pointecouteau (90, G. Polenta (4, 44), L. Popa (59), T. Poutanen (42, G. W. Pratt (72), J.-L. Puget (56), J. P. Rachen (21, R. Rebolo (64, 38), M. Reinecke (76), M. Remazeilles (56, C. Renault (73), S. Ricciardi (47), I. Ristorcelli (90, G. Rocha (67, C. Rodríguez-Gonzálvez (6), C. Rosset (1), M. Rossetti (32, J. A. Rubiño-Martín (64, C. Rumsey (6), B. Rusholme (53), M. Sandri (47), R. D. E. Saunders (6, G. Savini (80), M. P. Schammel (6), D. Scott (22), T. W. Shimwell (6), G. F. Smoot (26, J.-L. Starck (72), F. Stivoli (50), V. Stolyarov (6, 86), R. Sudiwala (82), R. Sunyaev (76, 84), D. Sutton (62, A.-S. Suur-Uski (25, J.-F. Sygnet (57), J. A. Tauber (41), L. Terenzi (47), L. Toffolatti (19, 65), M. Tomasi (48), M. Tristram (70), L. Valenziano (47), B. Van Tent (74), P. Vielva (65), F. Villa (47), N. Vittorio (35), L. A. Wade (67), B. D. Wandelt (57, 28), D. Yvon (16), A. Zacchei (45), A. Zonca (27), European Space Agency, Centre National D'Etudes Spatiales (France), Centre National de la Recherche Scientifique (France), Agenzia Spaziale Italiana, Consiglio Nazionale delle Ricerche, Istituto Nazionale di Fisica Nucleare, National Aeronautics and Space Administration (US), Department of Energy (US), Science and Technology Facilities Council (UK), UK Space Agency, Consejo Superior de Investigaciones Científicas (España), Ministerio de Ciencia e Innovación (España), Junta de Andalucía, Academy of Finland, Ministry of Education and Culture (Finland), German Centre for Air and Space Travel, Max Planck Society, National Space Institute (Denmark), Research Council of Norway, Science Foundation Ireland, Fundação para a Ciência e a Tecnologia (Portugal), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (HELFA), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), APC - Gravitation (APC-Gravitation), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), PLANCK, Planck, AMI Collaborations: N., Aghanim55, M., Arnaud70, M., Ashdown67, J., Aumont55, C., Baccigalupi79, A., Balbi35, A. J., Banday88, R. B., Barreiro63, E., Battaner90, R., Battye66, K., Benabed56, A., Benoˆıt54, J. P., Bernard8, M., Bersanelli32, R., Bhatia6, I., Bikmaev20, H., Bo ̈hringer75, A., Bonaldi66, J. R., Bond7, J., Borrill13, F. R., Bouchet56, H., Bourdin35, M. L., Brown66⋆, M., Bucher1, R., Burenin81, C., Burigana47, R. C., Butler47, P., Cabella36, P., Carvalho5, A., Catalano71, L., Cayo ́n26, A., Chamballu52, R. R., Chary53, L. Y., Chiang59, G., Chon75, D. L., Clements52, S., Colafrancesco44, S., Colombi56, B. P., Crill65, F., Cuttaia47, A., Da Silva11, H., Dahle61, R. D., Davies66, R. J., Davis66, P., de Bernardis31, G., de Gasperis35, A., de Rosa47, G., de Zotti43, J., Delabrouille1, J., De ́mocle`s70, C., Dickinson66, J. M., Diego63, K., Dolag89, H., Dole55, S., Donzelli48, O., Dore ́65, M., Douspis55, X., Dupac40, T. A., Enßlin74, H. K., Eriksen61, F., Feroz5, F., Finelli47, I., Flores Cacho8, O., Forni88, P., Fosalba57, M., Frailis45, E., Franceschi47, S., Fromenteau1, S., Galeotta45, K., Ganga1, R. T., Ge ́nova Santos62, M., Giard88, Y., Giraud He ́raud1, J., Gonza ́lez Nuevo63, K. M., Go ́rski65, K. J. B., Grainge5, Gregorio, Anna, A., Gruppuso47, F. K., Hansen61, D., Harrison60, S., Henrot Versille ́68, C., Herna ́ndez Monteagudo12, D., Herranz63, S. R., Hildebrandt9, E., Hivon56, M., Hobson5, W. A., Holmes65, K. M., Huffenberger91, G., Hurier71, N., Hurley Walker5, T., Jagemann40, M., Juvela25, E., Keiha ̈nen25, I., Khamitov86, R., Kneissl39, J., Knoche74, M., Kunz17, H., Kurki Suonio25, G., Lagache55, J. M., Lamarre69, A., Lasenby5, C. R., Lawrence65, M., Le Jeune1, S., Leach79, R., Leonardi40, A., Liddle24, P. B., Lilje61, M., Linden Vørnle16, M., Lo ́pez Caniego63, G., Luzzi68, J. F., Mac ́ıas Pe ́rez71, C. J., Mactavish67, D., Maino32, N., Mandolesi47, M., Maris45, F., Marleau19, D. J., Marshall88, E., Mart ́ınez Gonza ́lez63, S., Masi31, M., Massardi46, S., Matarrese30, F., Matthai74, P., Mazzotta35, A., Melchiorri31, J. B., Melin15, L., Mendes40, A., Mennella32, S., Mitra51, M. A., Miville Descheˆnes55, L., Montier88, G., Morgante47, D., Munshi80, P., Naselsky76, P., Natoli34, 4, 47, F., Noviello66, M., Olamaie5, S., Osborne85, F., Pajot55, D., Paoletti47, F., Pasian45, G., Patanchon1, T. J., Pearson9, O., Perdereau68, Y. C., Perrott5, F., Perrotta79, F., Piacentini31, E., Pierpaoli23, P., Platania64, E., Pointecouteau88, G., Polenta4, L., Popa58, T., Poutanen42, 25, 2, G. W., Pratt70, J. L., Puget55, J. P., Rachen21, R., Rebolo62, 14, 38, M., Reinecke74, M., Remazeilles55, C., Renault71, S., Ricciardi47, I., Ristorcelli88, G., Rocha65, C., Rodr ́ıguez Gonza ́lvez5, C., Rosset1, M., Rossetti32, J. A., Rubin ̃o Mart ́ın62, B., Rusholme53, R. D. E., Saunders5, G., Savini78, M. P., Schammel5, D., Scott22, T. W., Shimwell5, G. F., Smoot27, 73, 1, J. L., Starck70, F., Stivoli50, V., Stolyarov5, 67, 84, R., Sunyaev74, D., Sutton60, A. S., Suur Uski25, J. F., Sygnet56, J. A., Tauber41, L., Terenzi47, L., Toffolatti18, M., Tomasi48, M., Tristram68, L., Valenziano47, B., Van Tent72, P., Vielva63, F., Villa47, N., Vittorio35, L. A., Wade65, B. D., Wandelt56, 87, 29, D., Yvon15, A., Zacchei45, A., Zonca28, Universidad de Cantabria, Department of Physics, Helsinki Institute of Physics, HELFA - Hélium : du fondamental aux applications, Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Hélium : du fondamental aux applications (NEEL - HELFA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI)

Subjects
galaxies: clusters: intracluster medium, galaxies: clusters: general, cosmology: observations, cosmic background radiation, x-rays: galaxies: clusters, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astronomy, Arcminute Microkelvin Imager, Astrophysics, clusters: general [Galaxies], Parameter space, Cosmic background radiation, 01 natural sciences, 7. Clean energy, Angular diameter, galaxies, observations − Galaxies: cluster: general − Galaxies: clusters: intracluster medium − Cosmic background radiation [Cosmology], observations [Cosmology], 010303 astronomy & astrophysics, Physics, Cosmology: observations, Radius, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, symbols, Cluster sampling, Galaxies: clusters: intracluster medium, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, education, Cosmology: observations − Galaxies: cluster: general − Galaxies: clusters: intracluster medium − Cosmic background radiation, FOS: Physical sciences, clusters: intracluster medium [Galaxies], Astrophysics::Cosmology and Extragalactic Astrophysics, cosmology observations galaxies, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Cluster (physics), Galaxies: clusters: general, X-rays: galaxies: clusters, Planck, Galaxy cluster, Astrophysics::Galaxy Astrophysics, X rays, 010308 nuclear & particles physics, Astronomy and Astrophysics, Cosmology and Extragalactic Astrophysics, 115 Astronomy, Space science, Galaxies, Space and Planetary Science, astrophysics: cosmology and extragalactic astrophysics, galaxies: clusters [X-rays]
Abstract

A comparison is presented of Sunyaev-Zeldovich measurements for 11 galaxy clusters as obtained by Planck and by the ground-based interferometer, the Arcminute Microkelvin Imager. Assuming a universal spherically-symmetric Generalised Navarro, Frenk and White (GNFW) model for the cluster gas pressure profile, we jointly constrain the integrated Compton-Y parameter (Y 500) and the scale radius (θ500) of each cluster. Our resulting constraints in the Y500-θ500 2D parameter space derived from the two instruments overlap significantly for eight of the clusters, although, overall, there is a tendency for AMI to find the Sunyaev-Zeldovich signal to be smaller in angular size and fainter than Planck. Significant discrepancies exist for the three remaining clusters in the sample, namely A1413, A1914, and the newly-discovered Planck cluster PLCKESZ G139.59+24.18. The robustness of the analysis of both the Planck and AMI data is demonstrated through the use of detailed simulations, which also discount confusion from residual point (radio) sources and from diffuse astrophysical foregrounds as possible explanations for the discrepancies found. For a subset of our cluster sample, we have investigated the dependence of our results on the assumed pressure profile by repeating the analysis adopting the best-fitting GNFW profile shape which best matches X-ray observations. Adopting the best-fitting profile shape from the X-ray data does not, in general, resolve the discrepancies found in this subset of five clusters. Though based on a small sample, our results suggest that the adopted GNFW model may not be sufficiently flexible to describe clusters universally. © ESO, 2013., The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU).

Published
2012

29. The dynamics of the outer regions of the Coma cluster*

Author

Rafael Rebolo, Michiel P. van Haarlem, Carlos Gutiérrez de la Cruz, L. Cayón, and Enrique Martínez–González

Subjects
Physics, Astronomy, Velocity dispersion, Astronomy and Astrophysics, Coma (optics), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Galaxy, Radial velocity, Space and Planetary Science, Coma Cluster, Cluster (physics), Astrophysics::Earth and Planetary Astrophysics, CfA Redshift Survey, Astrophysics::Galaxy Astrophysics
Abstract

We apply the spherical infall model to compare the observed distribution of radial velocities of galaxies around Coma with predictions that are based on optical and X-ray overdensity profiles. Two optically selected galaxy catalogues, the CfA redshift survey and a UKST plate scanned with the APM, are used to determine the over-density profile of the cluster. The two sets of predicted caustics in the angular separation-redshift diagram are compared with a radial velocity catalogue which we have extended significantly in the range between 1° and 4° from the centre of the Coma cluster. In total, we have measured 98 new redshifts. Despite almost doubling the number of radial velocities in this interval, we fail to find the caustics with any degree of certainty

Published
1993

30. Variograms of the cosmic microwave background temperature fluctuations: confirmation of deviations from statistical isotropy

Author

L. Cayón

Subjects
Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Isotropy, Cosmic microwave background, Northern Hemisphere, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Geophysics, Universe, Physics::Geophysics, Space and Planetary Science, Range (statistics), Anisotropy, Variogram, Southern Hemisphere, Astrophysics::Galaxy Astrophysics, Physics::Atmospheric and Oceanic Physics, Astrophysics - Cosmology and Nongalactic Astrophysics, media_common
Abstract

The Standard Inflationary model predicts an isotropic distribution of the Cosmic Microwave Background temperature fluctuations. Detection of deviations from statistical isotropy would call for a revision of the physics of the early universe. This paper introduces the variogram as a powerful tool to detect and characterize deviations from statistical isotropy in Cosmic Microwave Background maps. Application to the Wilkinson Microwave Anisotropy Probe data clearly shows differences between the northern and the southern hemispheres. The sill and range of the northern hemisphere's variogram are lower than those of the southern hemisphere. Moreover the variogram for the northern hemisphere lies outside the 99% c.l. for scales above ten degrees. Differences between the northern and southern hemispheres in the functional dependence of the variogram with the scale can be used as a validation bench mark for proposed anisotropic cosmological models., submitted to MNRAS

Published
2010

31. The probability density function of the temperature autocorrelation of the cosmic microwave background for a Gaussian cosmological model

Author

E. Martínez-González, J. L. Sanz, and L. Cayón

Subjects
Physics, Cold dark matter, Hot dark matter, Gaussian, Dark matter, Cosmic microwave background, Astronomy and Astrophysics, Lambda-CDM model, Probability density function, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Sachs–Wolfe effect, symbols.namesake, Space and Planetary Science, symbols, Statistical physics
Abstract

The probability density function of the temperature autocorrelation is given in a semi-analytical form for the case of Gaussian temperature fluctuations. Based on this results we obtain confidence intervals for the anisotropies expected in several cosmological scenarios dominated by baryonic (B), hot dark matter (HDM) and cold dark matter (CDM) with adiabatic fluctuations. We also confront these expectations with the upper limits given by the present experiments at large angular scales

Published
1991

32. Pip analysis of the Tenerife and ULISSE data

Author

Carlos Gutiérrez de la Cruz, J. L. Sanz, Enrique Martinez-Gonzalez, and L. Cayón

Subjects
Physics, Mathematics::Dynamical Systems, Fourth order, Field (physics), Null (mathematics), Dispersion (optics), Cosmic microwave background, Ergodicity, Beam switching, Ergodic theory, Statistical physics
Abstract

The non ergodic behaviour of the CMB temperature fluctuations has been seen through the non null dispersion of the third and fourth order moments of this field. Beam switching techniques favour the ergodicity although the small area covered by the experiments unfavour it.

Published
2008

33. Strong Constraints on Cosmology from Galaxy Clusters

Author

Joseph Silk, Jose M. Diego, J. L. Sanz, Enrique Martínez-González, and L. Cayón

Subjects
Physics, education.field_of_study, Population, Cosmological constant, Astrophysics, Cosmology, Redshift, symbols.namesake, Cluster (physics), symbols, Probability distribution, Planck, education, Galaxy cluster
Abstract

In this work we show how galaxy clusters can be used to discriminate among different cosmological models. We have used available X-ray & optical cluster data to constrain the cosmological parameters as well as the cluster scaling relations, T −M and Lx − T . We also show the power of future SZE data to constrain even more these parameters. 1 Constraints from Optical and X-ray Data In several works, authors have used different cluster data sets in an attempt to constrain the cosmology. The usuall procedure is, starting from the Press-Schechter (PS) mass function, fit the experimental mass function or by using a given T −M or Lx −M relation build some other cluster functions like the temperature, X-ray luminosity or flux functions, and then compare them with the corresponding data sets. This can be a dangerous process. First, when considering just one data set one ensures that its best fitting model is compatible with just that data set. Some care should be taken to check that the best fitting model is also consistent with other data sets. A second problem comes when the cluster scaling relations T −M or Lx −M are assumed as fixed relations. However, the scatter in these relations are known to be important and they can introduce uncertainties in the final result. In order to avoid all these difficulties we made a fit to different data sets simultaneously without doing any assumption about neither the cosmology nor the T −M and Lx −M relations. For the T −M relation we assume the free-parameter relation: Tgas = T0M 15(1 + z) ψ (1) where T0, α and ψ are our three free parameters. M15 is the cluster mass in h−11015M units. And similarly for the Lx −M : L x = L0M β 15(1 + z) φ (2) With these two scalings plus the PS formalism we were able to build the mass function, the temperature function and the X-ray luminosity and flux functions. As can be seen in Diego et al. (2000a) we found that only low density universes (Ω ≈ 0.3 with or without a cosmological constant) are ESO Symposia: Mining the Sky, pp. 205–207, 2001. c © Springer-Verlag Berlin Heidelberg 2001 206 J.M. Diego et al. compatible with recent determinations of these functions. In that work we also obtain some interesting limits for the parameters in the cluster scaling relations. Also important is to mention that by combining different data sets in our fit, we have reduced significantly the degeneracy in σ8 − Ω. In fact, we found a clear peak in the probability distribution at the position σ8 = 0.8, Ω = 0.3 2 Constraints from Future SZE Data The possibilities of cluster data as a cosmological probe will increase when SZE surveys will be available. We are studing the possibilities of such data sets in order to know how well can we constrain the cosmological parameters and how these constraints depend on the assumptions made in, for instance, the T−M relation (see Diego et al. 2000b). In Diego et al. (2000a) we showed that with present X-ray and optical cluster data it is not possible to break the existing degeneracy between low-density universes with or without Λ. In that work we found that both models were equally probable when describing the previous data. Will it be possible to break this degeneracy with future SZE data ? To answer this question we have compared two hypothetical future SZE surveys. The first one is based on the Planck satellite. This experiment will explore the whole sky at 9 mm frequencies (including those where the SZE is more relevant) and with resolutions up to 5 arcmin. We have estimated that with this experiment it will be possible to detect more than 30000 clusters through the SZE which will allow to build the curve N(> Smm) (see Diego et al. 2000a). This curve can be used to fit the cosmological models. We have compared the N(> Smm) curves corresponding to the two best fitting models (Λ = 0 and Λ > 0) found in Diego et al. (2000a). Both models predict very similar N(> Smm) curves showing being therefore difficult to discriminate between the models. This is not surprising at all, since this curve is dominated by the cluster population at low redshift (z Smm) given by Planck and the N(> z) from a small sky patch selected from the SZE data. Fig. 1. Number of clusters with measured z required to distinguish (3σ) the two models in table 1 in Diego et al.(2000a).

Published
2003

34. Tests of Gaussianity

Author

Enrique Martínez-González, J. L. Sanz, Francisco Argüeso, J. E. Gallegos, L. Cayón, R. B. Barreiro, and A. M. Aliaga

Subjects
Physics, Field (physics), Isotropy, Cosmic microwave background, Astrophysics (astro-ph), Univariate, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Wavelet, Distribution (mathematics), Space and Planetary Science, Skewness, Kurtosis, Statistical physics
Abstract

We review two powerful methods to test the Gaussianity of the cosmic microwave background (CMB): one based on the distribution of spherical wavelet coefficients and the other on smooth tests of goodness-of-fit. The spherical wavelet families proposed to analyse the CMB are the Haar and the Mexican Hat ones. The latter is preferred for detecting non-Gaussian homogeneous and isotropic primordial models containing some amount of skewness or kurtosis. Smooth tests of goodness-of-fit have recently been introduced in the field showing some interesting properties. We will discuss the smooth tests of goodness-of-fit developed by Rayner and Best for the univariate as well as for the multivariate analysis., Comment: Proceedings of "The Cosmic Microwave Background and its Polarization", New Astronomy Reviews, (eds. S. Hanany and K.A. Olive), in press

Published
2003
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35. Tools to detect non-Gaussianity in non-standard cosmological models

Author

Francisco Argüeso, Julio E. Gallegos, Enrique Martínez-González, L. Cayón, and J. L. Sanz

Subjects
Physics, symbols.namesake, Wavelet, Non-Gaussianity, Gaussian, Cosmic microwave background, Mexican hat wavelet, symbols, Kurtosis, Statistical physics, Edgeworth series, Haar wavelet
Abstract

We present a method to detect non-Gaussianity in CMB temperature fluctuations maps, based on the spherical Mexican Hat wavelet. We have applied this method to artificially generated non-Gaussian maps using the Edgeworth expansion. Analysing the skewness and kurtosis of the wavelet coefficients in contrast to Gaussian simulations, the Mexican Hat is more efficient in detecting non-Gaussianity than the spherical Haar wavelet for all different leves of non-Gaussianity introduced. These results are relevant to test the Gaussian character of the CMB data. The method has also been applied to non-Gaussian maps generated by introducing an additional quadratic term in the gravitational potential.

Published
2002

36. Topology of the universe from COBE-DMR; a wavelet approach

Author

Krzysztof M. Gorski, R. Bowen, Joseph Silk, L. Cayón, Graca Rocha, A. Canavezes, and A. J. Banday

Subjects
Physics, media_common.quotation_subject, Cosmic microwave background, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Torus, Cosmic variance, Network topology, Topology, Astrophysics, Universe, Wavelet, Space and Planetary Science, Range (statistics), Limit (mathematics), media_common
Abstract

In this paper we pursue a new technique to search for evidence of a finite Universe, making use of a spherical mexican-hat wavelet decomposition of the microwave background fluctuations. Using the information provided by the wavelet coefficients at several scales we test whether compact orientable flat topologies are consistent with the COBE-DMR data. We consider topological sizes ranging from half to twice the horizon size. A scale-scale correlation test indicates that non-trivial topologies with appropriate topological sizes are as consistent with the COBE-DMR data as an infinite universe. Among the finite models the data seems to prefer a Universe which is about the size of the horizon for all but the hypertorus and the triple-twist torus. For the latter the wavelet technique does not seem a good discriminator of scales for the range of topological sizes considered here, while a hypertorus has a preferred size which is 80% of the horizon. This analysis allows us to find a best fit topological size for each model, although cosmic variance might limit our ability to distinguish some of the topologies., Comment: 10 pages, 13 figures (12 coloured), submitted to MNRAS. Figures 1,2 and 3 are not included but a complete version of the paper with high resolution figures can be downloaded from (http://www.mrao.cam.ac.uk/~graca/topol/)

Published
2002
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37. Constraining our Universe with X-ray & Optical Cluster Data

Author

Jose M. Diego, Joseph Silk, L. Cayón, J. L. Sanz, and E. Martínez-González

Subjects
Physics, education.field_of_study, media_common.quotation_subject, Population, Sigma, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmology, Virial theorem, Universe, Theoretical physics, Space and Planetary Science, Cluster (physics), education, Scaling, Free parameter, media_common
Abstract

We have used recent X-ray and optical data in order to impose some constraints on the cosmology and cluster scaling relations. Generically two kind of hypotheses define our model. First we consider that the cluster population is well described by the standard Press-Schechter (PS) formalism, and second, these clusters are supposed to follow scaling relations with mass: Temperature-Mass (T-M) and X-ray Luminosity-Mass (L_x - M). As a difference with many other authors we do not assume specific scaling relations to model cluster properties such as the usual $T-M$ virial relation or one observational determination of the $L_x-T$ relation. Instead we consider general free parameter scaling relations. With the previous model (PS plus scalings) we fit our free parameters to several X-ray and optical data with the advantage over many other works that we consider all the data sets at the same time. This prevents us from being inconsistent with some of the available observations. Among other interesting conclusions, we find that only low-density universes are compatible with all the data considered and that the degeneracy between $\Omega_m$ and $\sigma_8$ is broken. Also we obtain interesting limits on the parameters characterizing the scaling relations., Comment: 11 pages, 7 figures. MNRAS accepted version

Published
2000

38. Inside-Out Infall Formation of Disk Galaxies: Do Predictions Differ from Models without Size Evolution?

Author

Joseph Silk, Rychard Bouwens, and L. Cayón

Subjects
Physics, Hubble Deep Field, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Observable, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Redshift survey, Galaxy, Redshift, Space and Planetary Science, Angular diameter, Galaxy formation and evolution, Surface brightness, Astrophysics::Galaxy Astrophysics
Abstract

We develop an idealized inside-out formation model for disk galaxies to include a realistic mix of galaxy types and luminosities that provides a fair match to the traditional observables. The predictions of our infall models are compared against identical models with no-size evolution by generating fully realistic simulations of the HDF, from which we recover the angular size distributions. We find that our infall models produce nearly identical angular size distributions to those of our no-size evolution models in the case of a Omega = 0 geometry but produce slightly smaller sizes in the case of a Omega = 1 geometry, a difference we associate with the fact that there is a different amount of cosmic time in our two models for evolving to relatively low redshifts (z \approx 1-2). Our infall models also predict a slightly smaller (11% - 29%) number of large (disk scale lengths > 4 h_{50} ^{-1} kpc) galaxies at z \approx 0.7 for the CFRS as well as different increases in the central surface brightness of the disks for early-type spirals, the infall model predicting an increase by 1.2 magnitudes out to z \approx 2 (Omega = 0), 1 (Omega = 1), while our no-size evolution models predict an increase of only 0.5 magnitude. This result suggests that infall models could be important for explaining the 1.2-1.6 magnitude increase in surface brightness reported by Schade et al. (1995, 1996a, 1996b)., 12 pages, LaTeX (aaspp4.sty), accepted by ApJ Letters

Published
1997

39. The Effect of Weak Gravitational Lensing on the Cosmic Microwave Background Anisotropy: Flat versus Open Universes

Author

Enrique Martínez-González, J. L. Sanz, and L. Cayón

Subjects
Physics, Matter power spectrum, Cosmic microwave background, Astrophysics (astro-ph), Spectral density, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, Omega, Gravitational lens, Space and Planetary Science, Anisotropy, Weak gravitational lensing
Abstract

We have studied the effect of gravitational lensing on the Cosmic Microwave Background (CMB) anisotropy in flat and open universes. We develop a formalism to calculate the changes on the radiation power spectrum induced by lensing in the Newtonian and synchronous-comoving gauges. The previously considered negligible contribution to the CMB radiation power spectrum of the anisotropic term of the lensing correlation is shown to be appreciable. However, considering the nonlinear evolution of the matter power spectrum produces only slight differences on the results based on linear evolution. The general conclusion for flat as well as open universes is that lensing slightly smoothes the radiation power spectrum. For a given range of multipoles the effect of lensing increases with Omega but for the same acoustic peak it decreases with $\Omega$. The maximum contribution of lensing to the radiation power spectrum for $l\leq 2000$ is $\sim$ 5% for $\Omega$ values in the range 0.1-1., Comment: latex file in ApJ style, 17 pages, 3 ps figures

Published
1997
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40. Angular Sizes of Faint Field Disk Galaxies: Intrinsic Luminosity Evolution

Author

L. Cayón, Joseph Silk, and Stephane Charlot

Subjects
Physics, Field (physics), Hubble Deep Field, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Scale (descriptive set theory), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Redshift, Luminosity, Space and Planetary Science, Hubble space telescope, Galaxy formation and evolution, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

In order to explain the small scale-lengths detected in the recent deep field observations performed from large ground-based telescopes and from the Hubble Space Telescope, we investigate the predictions at high redshifts for disk galaxies that formed by infall. Changes with redshift in the observed properties of field galaxies are directly related to the evolution of the disks and of the stellar populations. We see that changes in the rest frame luminosity of a galaxy induce smaller values of half-light radii than are predicted assuming no evolution. Comparisons are presented with two observed samples from Mutz et al. (1994) and Smail et al. (1995)., plain tex file + 3 postscript figures. To be published in ApJL

Published
1996

41. Peaks in the Cosmic Microwave Background: flat versus open models

Author

Joseph Silk, L. Cayón, J. L. Sanz, Enrique Martínez-González, and R. B. Barreiro

Subjects
Physics, Gaussian, Cosmic microwave background, Astrophysics (astro-ph), Spectral density, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, symbols.namesake, Interferometry, Space and Planetary Science, Gaussian curvature, symbols, Probability distribution, Anisotropy, Maxima
Abstract

We present properties of the peaks (maxima) of the CMB anisotropies expected in flat and open CDM models. We obtain analytical expressions of several topological descriptors: mean number of maxima and the probability distribution of the gaussian curvature and the eccentricity of the peaks. These quantities are calculated as functions of the radiation power spectrum, assuming a gaussian distribution of temperature anisotropies. We present results for angular resolutions ranging from 5' to 20' (antenna FWHM), scales that are relevant for the MAP and COBRAS/SAMBA space missions and the ground-based interferometer experiments. Our analysis also includes the effects of noise. We find that the number of peaks can discriminate between standard CDM models, and that the gaussian curvature distribution provides a useful test for these various models, whereas the eccentricity distribution can not distinguish between them., Comment: 13 pages latex file using aasms4.sty + 3 tables + 2 postscript figures, to appear in ApJ (March 1997)

Published
1996
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42. Projected Clustering Around 1 Z < 2 Radiogalaxies

Author

J. I. González-Serrano, L. Cayón, N. Beniítez, and E. Martínez-González

Subjects
Physics, Theoretical physics, Gravitational lens, Astrophysics, Cluster analysis, Galaxy
Abstract

We have taken deep R-band images of fields around five radiogalaxies: 0956+47, 1217+36, 3C256, 3C324 and 3C294 with 1 < z < 2. We found a statistically significant excess of bright (19.5 < R < 22) galaxies on scales of 2 arcmin around the radiogalaxies. The excess has been determined empirically to be at ≳99.5% level. It is remarkable that this excess is not present for 22 < R < 23.75 galaxies within the same area, suggesting that the excess is not physically associated to the galaxies but due to intervening groups and then related to gravitational lensing.

Published
1996

43. Upper Limits on the LYα Emission aT Z = 3.4

Author

E. Martinez-Gonzalez, J. M. Martin-Mirones, L. Cayón, J. L. Sanz, and J. I. Gonzalez-Serrano

Subjects
Physics, Star formation, Radio galaxy, Galaxy formation and evolution, Hydrogen line, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics::Galaxy Astrophysics, Galaxy, Redshift
Abstract

Many searches have been carried out to detect emission from massive primeval hydrogen clouds at high redshift. By observing the 21 cm line it has been possible to impose strong upper limits on the mass and number of protoclusters at high redshift (Wieringa, et. al. 1992). Since strong Lyα emission is expected from primeval galaxies undergoing their first burst of star formation, many attempts to detect this emission have been made, but no positive detection has been reported, imposing strong constraints on models of galaxy formation (see Djorgovski et. al. 1993 for a review).

Published
1996

44. Hot and Cold Spots in the First Plus Second Year COBE/DMR Maps

Author

L. Cayón and George F. Smoot

Subjects
Physics, Cold spot, Monte Carlo method, Cosmic microwave background, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Decoupling (cosmology), Astrophysics::Cosmology and Extragalactic Astrophysics, Space and Planetary Science, Quadrupole, Instrumental noise, Statistical analysis
Abstract

Density perturbations at the decoupling epoch produce angular fluctuations in the temperature of the Cosmic Microwave Background (CMB) radiation that may appear as hot and cold spots. Observational data of the CMB includes instrumental noise in addition to the cosmological signal. One would like to determine which of the observed spots are produced by the noise and which correspond to signal. In this work we first present a statistical analysis of the first plus second year COBE/DMR map at 53 GHz that reveals the presence of cosmological signal in the data. The analysis is based on Harrison-Zeldovich Monte Carlo realizations and utilizes a generalized $\chi^2$ statistic. The method is applied to the number of spots and the fraction of the total area that appear above/below a certain value of the dispersion of the noise, including and excluding the quadrupole, giving $Q_{rms-PS}=15^{+3}_{-6}$, $18^{+5}_{-7} \mu K$ and $Q_{rms-PS}=18^{+3}_{-4}$, $21\pm6 \mu K$, at the $95\%$ confidence level, respectively. The data taken by the COBE/DMR experiment during the first two years at three different frequencies (31, 53 and 90 GHz) are used to determine which of the spots observed at 53 GHz appear simultaneously in the other two channels. The significance of those spots is determined by comparison of their area and signal-to-noise with noise Monte Carlo simulations. We point out two cold spots and one hot spot at positions $(l,b)\approx (-99^{\circ},57^{\circ}),(-21^{\circ},-45^{\circ}), (-81^{\circ},-33^{\circ})$ respectively, at the $95 \%$ confidence level., Comment: uuencoded compressed postscript including figures. To be published in ApJ

Published
1994

45. Planckearly results. I. ThePlanckmission

Author

P. A. R. Ade[82], N. Aghanim[54], M. Arnaud[68], M. Ashdown[66-4], J. Aumont[54], C. Baccigalupi[80], M. Baker[37], A. Balbi[31], A. J. Banday[89-9-73], R. B. Barreiro[62], J. G. Bartlett[3-64], E. Battaner[91], K. Benabed[55], K. Bennett[38], A. Benoît[53], J.-P. Bernard[89-9], M. Bersanelli[28-46], R. Bhatia[5], J. J. Bock[64-10], A. Bonaldi[42], J. R. Bond[6], J. Borrill[72-84], F. R. Bouchet[55], T. Bradshaw[79], M. Bremer[38], M. Bucher[3], C. Burigana[45], R. C. Butler[45], P. Cabella[31], C. M. Cantalupo[72], B. Cappellini[46], J.-F. Cardoso[69-3-55], R. Carr[35], M. Casale[35], A. Catalano[3-67], L. Cayón[21], A. Challinor[59-66-12], A. Chamballu[51], J. Charra[54], R.-R. Chary[52], L.-Y. Chiang[58], C. Chiang[20], P. R. Christensen[76-32], D. L. Clements[51], S. Colombi[55], F. Couchot[71], A. Coulais[67], B. P. Crill[64-77], G. Crone[38], M. Crook[79], F. Cuttaia[45], L. Danese[80], O. D'Arcangelo[63], R. D. Davies[65], R. J. Davis[65], P. de Bernardis[27], J. de Bruin[37], G. de Gasperis[31], A. de Rosa[45], G. de Zotti[42-80], J. Delabrouille[3], J.-M. Delouis[55], F.-X. Désert[49], J. Dick[80], C. Dickinson[65], K. Dolag[73], H. Dole[54], S. Donzelli[46-60], O. Doré[64-10], U. Dörl[73], M. Douspis[54], X. Dupac[36], G. Efstathiou[59], T. A. Enßlin[73], H. K. Eriksen[60], F. Finelli[45], S. Foley[37], O. Forni[89-9], P. Fosalba[56], M. Frailis[44], E. Franceschi[45], M. Freschi[36], T. C. Gaier[64], S. Galeotta[44], J. Gallegos[36], B. Gandolfo[37], K. Ganga[3-52], M. Giard[89-9], G. Giardino[38], G. Gienger[37], Y. Giraud-Héraud[3], J. González[35], J. González-Nuevo[80], K. M. Górski[64, 93], S. Gratton[66, 59], A. Gregorio[29], A. Gruppuso[45], G. Guyot[48], J. Haissinski[71], F. K. Hansen[60], D. Harrison[59-66], G. Helou[10], S. Henrot-Versillé[71], C. Hernández-Monteagudo[73], D. Herranz[62], S. R. Hildebrandt[10-70-61], E. Hivon[55], M. Hobson[4], W. A. Holmes[64], A. Hornstrup[14], W. Hovest[73], R. J. Hoyland[61], K. M. Huffenberger[92], A. H. Jaffe[51], T. Jagemann[36], W. C. Jones[20], J. J. Juillet[87], M. Juvela[19], P. Kangaslahti[64], E. Keihänen[19], R. Keskitalo[64-19], T. S. Kisner[72], R. Kneissl[34-5], L. Knox[23], M. Krassenburg[38], H. Kurki-Suonio[19-40], G. Lagache[54], A. Lähteenmäki[1-40], J.-M. Lamarre[67], A. E. Lange[52], A. Lasenby[4-66], R. J. Laureijs[38], C. R. Lawrence[64], S. Leach[80], J. P. Leahy[65], R. Leonardi[36-38-24], C. Leroy[54-89-9], P. B. Lilje[60-11], M. Linden-Vørnle[14], M. López-Caniego[62], S. Lowe[65], P. M. Lubin[24], J. F. Macías-Pérez[70], T. Maciaszek[7], C. J. MacTavish[66], B. Maffei[65], D. Maino[28-46], N. Mandolesi[45], R. Mann[81], M. Maris[44], E. Martínez-González[62], S. Masi[27], M. Massardi[42], S. Matarrese[26], F. Matthai[73], P. Mazzotta[31], A. McDonald[37], P. McGehee[52], P. R. Meinhold[24], A. Melchiorri[27], J.-B. Melin[13], L. Mendes[36], A. Mennella[28-44], C. Mevi[37], R. Miniscalco[37], S. Mitra[64], M.-A. Miville-Deschênes[54-6], A. Moneti[55], L. Montier[89-9], G. Morgante[45], N. Morisset[50], D. Mortlock[51], D. Munshi[82-59], A. Murphy[75], P. Naselsky[76-32], P. Natoli[30-2-45], C. B. Netterfield[16], H. U. Nørgaard-Nielsen[14], F. Noviello[54], D. Novikov[51], I. Novikov[76], I. J. O'Dwyer[64], I. Ortiz[35], S. Osborne[86], P. Osuna[35], C. A. Oxborrow[14], F. Pajot[54], R. Paladini[85, 10], B. Partridge[39], F. Pasian[44], T. Passvogel[38], G. Patanchon[3], D. Pearson[64], T. J. Pearson[10-52], O. Perdereau[71], L. Perotto[70], F. Perrotta[80], F. Piacentini[27], M. Piat[3], E. Pierpaoli[18], S. Plaszczynski[71], P. Platania[63], E. Pointecouteau[89-9], G. Polenta[2-43], N. Ponthieu[54], L. Popa[57], T. Poutanen[40-19-1], G. Prézeau[10-64], S. Prunet[55], J.-L. Puget[54], J. P. Rachen[73], W. T. Reach[90], R. Rebolo[61-33], M. Reinecke[73], J.-M. Reix[87], C. Renault[70], S. Ricciardi[45], T. Riller[73], I. Ristorcelli[89-9], G. Rocha[64-10], C. Rosset[3], M. Rowan-Robinson[51], J. A. Rubiño-Martín[61-33], B. Rusholme[52], E. Salerno[8], M. Sandri[45], D. Santos[70], G. Savini[78], B. M. Schaefer[88], D. Scott[17], M. D. Seiffert[64], P. Shellard[12], A. Simonetto[63], G. F. Smoot[22-72-3], C. Sozzi[63], J.-L. Starck[68-13], J. Sternberg[38], F. Stivoli[47], V. Stolyarov[4], R. Stompor[3], L. Stringhetti[45], R. Sudiwala[82], R. Sunyaev[73-83], J.-F. Sygnet[55], D. Tapiador[35], J. A. Tauber[38], D. Tavagnacco[44], D. Taylor[35], L. Terenzi[45], D. Texier[35], L. Toffolatti[15], M. Tomasi[28-46], J.-P. Torre[54], M. Tristram[71], J. Tuovinen[74], M. Türler[50], M. Tuttlebee[37], G. Umana[41], L. Valenziano[45], J. Valiviita[60], J. Varis[74], L. Vibert[54], P. Vielva[62], F. Villa[45], N. Vittorio[31], L. A. Wade[64], B. D. Wandelt[55-25], C. Watson[37], S. D. M. White[73], M. White[22], A. Wilkinson[65], D. Yvon[13], A. Zacchei[44], A. Zonca[24], Plank Collaboration, Universidad de Cantabria, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (NEEL - HELFA), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Laboratoire Traitement et Communication de l'Information (LTCI), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), APC - Gravitation (APC-Gravitation), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), Département de Physique des Particules (ex SPP) (DPhP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Recherche en Informatique (LRI), Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), PLANCK, Ade, P. A. R., Aghanim, N., Arnaud, M., Ashdown, M., Aumont, J., Baccigalupi, C., Baker, M., Balbi, A., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Battaner, E., Benabed, K., Bennett, K., Benoît, A., Bernard, J. P., Bersanelli, M., Bhatia, R., Bock, J. J., Bonaldi, A., Bond, J. R., Borrill, J., Bouchet, F. R., Bradshaw, T., Bremer, M., Bucher, M., Burigana, C., Butler, R. C., Cabella, P., Cantalupo, C. M., Cappellini, B., Cardoso, J. F., Carr, R., Casale, M., Catalano, A., Cayón, L., Challinor, A., Chamballu, A., Charra, J., Chary, R. R., Chiang, L. Y, Chiang, C., Christensen, P. R., Clements, D. L., Colombi, S., Couchot, F., Coulais, A., Crill, B. P., Crone, G., Crook, M., Cuttaia, F., Danese, L., D'Arcangelo, O., Davies, R. D., Davis, R. J., de Bernardis, P., de Bruin, J., de Gasperis, G., de Rosa, A., de Zotti, G., Delabrouille, J., Delouis, J. M., Désert, F. X., Dick, J., Dickinson, C., Dolag, K., Dole, H., Donzelli, S., Doré, O., Dörl, U., Douspis, M., Dupac, X., Efstathiou, G., Enßlin, T. A., Eriksen, H. K., Finelli, F., Foley, S., Forni, O., Fosalba, P., Frailis, M., Franceschi, E., Freschi, M., Gaier, T. C., Galeotta, S., Gallegos, J., Gandolfo, B., Ganga, K., Giard, M., Giardino, G., Giraud Héraud, Y., González, J., González Nuevo, J., Górski, K. M., Gratton, S., Gregorio, Anna, Gruppuso, A., Guyot, G., Haissinski, J., Hansen, F. K., Harrison, D., Helou, G., Henrot Versillé, S., Hernández Monteagudo, C., Herranz, D., Hildebrandt, S. R., Hivon, E., Hobson, M., Holmes, W. A., Hornstrup, A., Hovest, W., Hoyland, R. J., Huffenberger, K. M., Jaffe, A. H., Jagemann, T., Jones, W. C., Juillet, J. J., Juvela, M., Kangaslahti, P., Keihänen, E., Keskitalo, R., Kisner, T. S., Kneissl, R., Knox, L., Krassenburg, M., Kurki Suonio, H., Lagache, G., Lähteenmäki, A., Lamarre, J. M., Lange, A. E., Lasenby, A., Laureijs, R. J., Lawrence, C. R., Leach, S., Leahy, J. P., Leonardi, R., Leroy, C., Lilje, P. B., Linden Vørnle, M., López Caniego, M., Lowe, S., Lubin, P. M., Macías Pérez, J. F., Maciaszek, T., Mactavish, C. J., Maffei, B., Maino, D., Mandolesi, N., Mann, R., Maris, M., Martínez González, E., Masi, S., Massardi, M., Matarrese, S., Matthai, F., Mazzotta, P., Mcdonald, A., Mcgehee, P., Meinhold, P. R., Melchiorri, A., Melin, J. B., Mendes, L., Mennella, A., Mevi, C., Miniscalco, R., Mitra, S., Miville Deschênes, M. A., Moneti, A., Montier, L., Morgante, G., Morisset, N., Mortlock, D., Munshi, D., Murphy, A., Naselsky, P., Natoli, P., Netterfield, C. B., Nørgaard Nielsen, H. U., Noviello, F., Novikov, D., Novikov, I., O'Dwyer, I. J., Ortiz, I., Osborne, S., Osuna, P., Oxborrow, C. A., Pajot, F., Paladini, R., Partridge, B., Pasian, F., Passvogel, T., Patanchon, G., Pearson, D., Pearson, T. J., Perdereau, O., Perotto, L., Perrotta, F., Piacentini, F., Piat, M., Pierpaoli, E., Plaszczynski, S., Platania, P., Pointecouteau, E., Polenta, G., Ponthieu, N., Popa, L., Poutanen, T., Prézeau, G., Prunet, S., Puget, J. L., Rachen, J. P., Reach, W. T., Rebolo, R., Reinecke, M., Reix, J. M., Renault, C., Ricciardi, S., Riller, T., Ristorcelli, I., Rocha, G., Rosset, C., Rowan Robinson, M., Rubiño Martín, J. A., Rusholme, B., Salerno, E., Sandri, M., Santos, D., Savini, G., Schaefer, B. M., Scott, D., Seiffert, M. D., Shellard, P., Simonetto, A., Smoot, G. F., Sozzi, C., Starck, J. L., Sternberg, J., Stivoli, F., Stolyarov, V., Stompor, R., Stringhetti, L., Sudiwala, R., Sunyaev, R., Sygnet, J. F., Tapiador, D., Tauber, J. A., Tavagnacco, Daniele, Taylor, D., Terenzi, L., Texier, D., Toffolatti, L., Tomasi, M., Torre, J. P., Tristram, M., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Valiviita, J., Varis, J., Vibert, L., Vielva, P., Villa, F., Vittorio, N., Wade, L. A., Wandelt, B. D., Watson, C., White, S. D. M., White, M., Wilkinson, A., Yvon, D., Zacchei, A., Zonca, A., Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), HELFA - Hélium : du fondamental aux applications, Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Département de Physique des Particules (ex SPP) (DPP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Hélium : du fondamental aux applications (HELFA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), École normale supérieure - Paris (ENS Paris), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CentraleSupélec-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Department of Physics, and Helsinki Institute of Physics

Subjects
Experimental Physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Computer science, Surveys, Cosmic background radiation, 7. Clean energy, 01 natural sciences, CMB physics, Space vehicles: instruments, Instrumentation: detectors, observations [Cosmology], Instrumentation, 010303 astronomy & astrophysics, detectors [Instrumentation], QB, detectors, media_common, Planck ESA mission, Conjunction (astronomy), Cosmology: observations, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmology, observations, Early results, cosmic backround radiation, instruments, symbols, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], cosmology: observations, cosmic background radiation, surveys, space vehicles: instruments, instrumentation: detectors, catalogs, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, space vehicles, cosmology, instrumentation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], media_common.quotation_subject, education, FOS: Physical sciences, Catalogs, Space vehicles, instruments [Space vehicles], [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Planck, Early release, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010308 nuclear & particles physics, Payload, Astronomy, Astronomy and Astrophysics, 115 Astronomy, Space science, Catalogues, Astrophysics - Astrophysics of Galaxies, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [PHYS.ASTR.GA]Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), Satellite
Abstract

16 páginas, 14 figuras, 3 tablas.-- Planck Collaboration: et al., The European Space Agency’s Planck satellite was launched on 14 May 2009, and has been surveying the sky stably and continuously since 13 August 2009. Its performance is well in line with expectations, and it will continue to gather scientific data until the end of its cryogenic lifetime. We give an overview of the history of Planck in its first year of operations, and describe some of the key performance aspects of the satellite. This paper is part of a package submitted in conjunction with Planck’s Early Release Compact Source Catalogue, the first data product based on Planck to be released publicly. The package describes the scientific performance of the Planck payload, and presents results on a variety of astrophysical topics related to the sources included in the Catalogue, as well as selected topics on diffuse emission., The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU).

Published
2011

46. Cosmic Microwave Background Radiation Power Spectrum in Cold Dark Matter Open Universes Up to Second-Order Perturbations

Author

L. Cayón, Joseph Silk, J. L. Sanz, Enrique Martínez-González, and Naoshi Sugiyama

Subjects
Physics, Big Bang, Cold dark matter, Hot dark matter, Cosmic microwave background, Dark matter, Cosmic background radiation, Scalar field dark matter, Astronomy, Astronomy and Astrophysics, Astrophysics, symbols.namesake, Space and Planetary Science, symbols, Planck
Published
1996

47. R-band imaging of fields around 1 less than Z less than 2 radiogalaxies

Author

J. I. González-Serrano, Enrique Martínez-González, L. Cayón, and Narciso Benítez

Subjects
Physics, Red shift, Gravitational lens, Galaxy groups and clusters, Space and Planetary Science, Radio galaxy, Astronomy and Astrophysics, Astrophysics, Spatial distribution, Data reduction, Visible spectrum, Luminosity
Published
1995

48. Gravitational lensing and the cosmic microwave background

Author

J. L. Sanz, Enrique Martínez-González, and L. Cayón

Subjects
Physics, COSMIC cancer database, Strong gravitational lensing, Cosmic microwave background, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Computational astrophysics, Gravitational lens, Space and Planetary Science, Microwave, Weak gravitational lensing, Background radiation
Abstract

We present calculations of the effect of the gravitational lensing of the cosmic microwave photons, produced by linear density perturbations, on the anisotropies of the cosmic microwave background for several popular cosmological scenarios. The result is an appreciable amplification of the order of 20% for ΔT/T in present experiments of several arcminute scales, whereas previous work dealing with nonlinear density fluctuations find a negligible amplification. On smaller scales of a few arcminutes (

Published
1993

49. Does a cosmological constant increase the effect of gravitational lensing on the cosmic microwave background?

Author

Enrique Martínez-González, J. L. Sanz, and L. Cayón

Subjects
Physics, Space and Planetary Science, De Sitter universe, Cosmic microwave background, Gravitational lensing formalism, Strong gravitational lensing, Dark energy, Astronomy and Astrophysics, Lambda-CDM model, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Flatness problem, Weak gravitational lensing
Abstract

We consider flat universes with nonzero cosmological constant (Λ) and study the temperature anisotropies caused by microwave photons affected by gravitational lensing. We study the lensing effect produced by linear density fluctuations present from recombination to now. The result is that, for the cold dark matter (CDM) model, the dispersion of the gravitational deflections decreases with A. Considering that scenario with two values of Ω 0 (Ω 0 =0.2, 1), we calculate the effect of bending on measurements of small-scale experiments finding that the enhancement of the temperature anisotropies measured in a flat universe with Λ¬=0 is slightly lower than the one measured in a flat universe with zero cosmological constant

50. Segregated optical-near-infrared colour distributions of medium deep survey galaxies

Author

Ignacio Ferreras, E. Martínez-González, L. Cayón, and Narciso Benítez

Subjects
Physics, Spectral evolution, Number density, Space and Planetary Science, Limiting magnitude, Magnitude (astronomy), High resolution, Astronomy and Astrophysics, Astrophysics, Omega, Galaxy
Abstract

We present a K survey of 29 fields covering approximately 90 arcmin^2 from the Medium Deep Survey (MDS) catalogue down to a completeness magnitude of K=18.0 (limiting magnitude K=19.0). The morphology obtained by the MDS team using high resolution images from HST/WFPC2 along with our NIR observations allow a Colour-Magnitude and Colour-Colour analysis that agrees in general with spectral evolution models (Bruzual & Charlot 1998) especially if a reasonable range of metallicities for the Simple Stellar Populations used (0.2 4.5, setting an upper limit to the number density of EROs at dn_{EROs}/d\Omega < 0.011 arcmin^{-2} (K < 18.0).

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