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Your search keyword '"Jauzac M."' showing total 9 results
Start Over Author "Jauzac M." Topic cosmology and nongalactic astrophysics (astro-ph.co)
9 results on '"Jauzac M."'

1. On the correlation between dark matter, intracluster light and globular cluster distribution in SMACS0723

Author

Diego, J. M., Pascale, M., Frye, B., Zitrin, A., Broadhurst, T., Mahler, G., Caminha, G. B., Jauzac, M., Lee, Myung Gyoon, Bae, Jang Ho, Jang, In Sung, and Montes, Mireia

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present a free-form model of SMACS0723, the first cluster observed with JWST. This model makes no strong assumptions about the distribution of mass (mostly dark matter) in the cluster and we use it to study the possible correlation between dark matter with the intracluster light and distribution of globular clusters. To explore the uncertainty in mass modelling, we derive three lens models based on spectroscopically confirmed systems and new candidate systems with redshifts predicted by the lens model derived from the spectroscopic systems. We find that beyond the radius of influence of the BCG, the total mass does not trace the ICL, implying the need for a dark component (dark matter). Two loop-like structures observed in the intracluster light do not have an obvious correspondence with the total mass (mostly dark matter) distribution. The radial profiles of the ICL and the distribution of globular clusters are similar to each other, but steeper than the profile of the lens model. More specifically, we find that the total mass is shallower by 1 dex in log scale than both ICL and globular cluster profiles. This is in excellent agreement with N-body simulations of cold dark matter., 12 pages, 8 figures

Published
2023

2. The Magnificent Five Images of Supernova Refsdal: Time Delay and Magnification Measurements

Author

Kelly, Patrick L., Rodney, Steven A., Treu, Tommaso, Birrer, S., Bonvin, V, Dessart, Luc, Foley, R., Filippenko, A.V., Gilman, D., Jha, Saurabh, Hjorth, Jens, Mandel, Kaisey S., Millon, Martin, Pierel, Justin D. R., Thorpe, Stephen, Zitrin, A., Broadhurst, Tom, Chen, Wenlei, Di Diego, José M, Dressler, A., Graur, O., Jauzac, M., Malkan, M.A., McCully, C., Oguri, M., Postman, M., Schmidt, Kasper Borello, Sharon, Keren, Tucker, Brad E., von der Linden, A., Wambsganss, Joachim, Mandel, Kaisey [0000-0001-9846-4417], Apollo - University of Cambridge Repository, Kelly, Patrick L [0000-0003-3142-997X], Treu, Tommaso [0000-0002-8460-0390], Birrer, Simon [0000-0003-3195-5507], Bonvin, Vivien [0000-0003-1471-3952], Dessart, Luc [0000-0003-0599-8407], Foley, Ryan J [0000-0002-2445-5275], Filippenko, Alexei V [0000-0003-3460-0103], Gilman, Daniel [0000-0002-5116-7287], Jha, Saurabh [0000-0001-8738-6011], Hjorth, Jens [0000-0002-4571-2306], Millon, Martin [0000-0001-7051-497X], Pierel, Justin [0000-0002-2361-7201], Zitrin, Adi [0000-0002-0350-4488], Chen, Wenlei [0000-0003-1060-0723], Diego, Jose M [0000-0001-9065-3926], Dressler, Alan [0000-0002-6317-0037], Graur, Or [0000-0002-4391-6137], Jauzac, Mathilde [0000-0003-1974-8732], Malkan, Matthew A [0000-0001-6919-1237], McCully, Curtis [0000-0001-5807-7893], Oguri, Masamune [0000-0003-3484-399X], Postman, Marc [0000-0002-9365-7989], Schmidt, Kasper Borello [0000-0002-3418-7251], Sharon, Keren [0000-0002-7559-0864], Tucker, Brad E [0000-0002-4283-5159], von der Linden, Anja [0000-0002-3881-7724], and Wambsganss, Joachim [0000-0002-8365-7619]

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Space and Planetary Science, 5101 Astronomical Sciences, FOS: Physical sciences, Astronomy and Astrophysics, Galaxies and Cosmology, 51 Physical Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

In late 2014, four images of Supernova (SN) "Refsdal," the first known example of a strongly lensed SN with multiple resolved images, were detected in the MACS J1149 galaxy-cluster field. Following the images' discovery, the SN was predicted to reappear within hundreds of days at a new position ~8 arcseconds away in the field. The observed reappearance in late 2015 makes it possible to carry out Refsdal's (1964) original proposal to use a multiply imaged SN to measure the Hubble constant H0, since the time delay between appearances should vary inversely with H0. Moreover, the position, brightness, and timing of the reappearance enable a novel test of the blind predictions of galaxy-cluster models, which are typically constrained only by the positions of multiply imaged galaxies. We have developed a new photometry pipeline that uses DOLPHOT to measure the fluxes of the five images of SN Refsdal from difference images. We apply four separate techniques to perform a blind measurement of the relative time delays and magnification ratios (mu_i/mu_1) between the last image SX and the earlier images S1-S4. We measure the relative time delay of SX-S1 to be 376.0+5.6-5.5 days and the relative magnification to be 0.30+0.05-0.03. This corresponds to a 1.5% precision on the time delay and 17% precision for the magnification ratios, and includes uncertainties due to millilensing and microlensing. In an accompanying paper, we place initial and blind constraints on the value of the Hubble constant., Comment: Published in ApJ. Companion paper presenting H0 constraints published in Science (DOI: 10.1126/science.abh1322)

Published
2023
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3. Molecular gas and star formation activity in LIRGs in clusters at intermediate redshifts

Author

Castignani, G., Jablonka, P., Combes, F., Haines, C. P., Rawle, T., Jauzac, M., Egami, E., Krips, M., Sp��rone-Longin, D., Arnaud, M., Garc��a-Burillo, S., Schinnerer, E., and Bigiel, F.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We investigate the role of dense Mpc-scale environments in processing molecular gas of cluster galaxies as they fall into the cluster cores. We consider $\sim20$ luminous infrared galaxies (LIRGs) in intermediate-$z$ clusters, from the Hershel Lensing Survey and the Local Cluster Substructure Survey. They include MACS J0717.5+3745 at $z=0.546$ and Abell 697, 963, 1763, and 2219 at $z=0.2-0.3$. We have performed far infrared to ultraviolet spectral energy distribution modeling of the LIRGs, which span cluster-centric distances within $r/r_{200}\simeq0.2-1.6$. We have observed the LIRGs in CO(1$\rightarrow$0) or CO(2$\rightarrow$1) with the Plateau de Bure interferometer and its successor NOEMA, as part of five observational programs carried out between 2012 and 2017. We have compared the molecular gas to stellar mass ratio $M(H_2)/M_\star$, star formation rate (SFR), and depletion time ($\tau_{\rm dep}$) of the LIRGs with those of a compilation of cluster and field star forming galaxies. The targeted LIRGs have SFR, $M(H_2)/M_\star$, and $\tau_{\rm dep}$ that are consistent with those of both main sequence (MS) field galaxies and star forming galaxies from the comparison sample. However we find that the depletion time, normalized to the MS value, increases with increasing $r/r_{200}$, with a significance of $2.8\sigma$, which is ultimately due to a deficit of cluster core LIRGs with $\tau_{\rm dep}\gtrsim\tau_{\rm dep,MS}$. We suggest that a rapid exhaustion of the molecular gas reservoirs occurs in the cluster LIRGs and is effective in suppressing their star formation. This mechanism may explain the exponential decrease of the fraction of cluster LIRGs with cosmic time. The compression of the gas in LIRGs, possibly induced by intra-cluster medium shocks, may be responsible for the short depletion timescales, observed in a large fraction of cluster core LIRGs., Comment: 26 pages, 10 figures, 5 tables, A&A in press

Published
2020

4. Abell 2744: Too much substructure for Lambda CDM?

Author

Schwinn, J., Jauzac, M., Baugh, C. M., Bartelmann, M., Dominique Eckert, Harvey, D., Natarajan, P., and Massey, R.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), galaxies: clusters: individual: Abell 2744, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, cosmology: miscellaneous, Astrophysics::Galaxy Astrophysics, methods: numerical, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The massive substructures found in Abell 2744 by Jauzac et al. (2016) present a challenge to the cold dark matter paradigm due to their number and proximity to the cluster centre. We use one of the biggest N-body simulations, the Millennium XXL, to investigate the substructure in a large sample of massive dark matter haloes. A range of effects which influence the comparison with the observations is considered, extending the preliminary evaluation carried out by Jauzac et al. (2016). There are many tens of haloes in the simulation with a total mass comparable with or larger than that of Abell 2744. However, we find no haloes with a number and distribution of massive substructures (> 5 10^13 Msun) that is close to that inferred from the observations of Abell 2744. The application of extreme value statistics suggests that we would need a simulation of at least ten times the volume of the Millennium XXL to find a single dark matter halo with a similar internal structure to Abell 2744. Explaining the distribution of massive substructures in clusters is a new hurdle for hierarchical models to negotiate, which is not weakened by appeals to baryonic physics or uncertainty over the nature of the dark matter particle., 12 pages, 5 figures, Accepted for publication in MNRAS, V2: minor changes in the manuscript

Published
2016

5. First detection of the Sunyaev Zel'dovich effect increment at lambda < 650 um

Author

Zemcov, M., Rex, M., Rawle, T. D., Bock, J. J., Egami, E., Altieri, B., Blain, A. W., Boone, F., Bridge, C. R., Clement, B., Combes, F., Dowell, C. D., Dessauges-Zavadsky, M., Fadda, D., Ilbert, O., Ivison, R. J., Jauzac, M., Kneib, J. -P., Lutz, D., Pell��, R., Pereira, M. J., P��rez-Gonz��lez, P. G., Richard, J., Rieke, G. H., Rodighiero, G., Schaerer, D., Smith, G. P., Valtchanov, I., Walth, G. L., van der Werf, P., and Werner, M. W.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences
Abstract

The Sunyaev-Zel'dovich (SZ) effect is a spectral distortion of the cosmic microwave background as observed through the hot plasma in galaxy clusters. This distortion is a decrement in the CMB intensity for lambda > 1.3 mm, an increment at shorter wavelengths, and small again by lambda ~250 um. As part of the Herschel Lensing Survey (HLS) we have mapped 1E0657-56 (the Bullet cluster) with SPIRE with bands centered at 250, 350 and 500 um and have detected the SZ effect at the two longest wavelengths. The measured SZ effect increment central intensities are Delta I_{0} = 0.097 +- 0.019 MJy sr^{-1} at 350 um and Delta I_{0} = 0.268 +- 0.031 MJy sr^{-1} at 500 um, consistent with the SZ effect spectrum derived from previous measurements at 2 mm. No other diffuse emission is detected. The presence of the finite temperature SZ effect correction is preferred by the SPIRE data at a significance of 2.1 sigma, opening the possibility that the relativistic SZ effect correction can be constrained by SPIRE in a sample of clusters. The results presented here have important ramifications for both sub-mm measurements of galaxy clusters and blank field surveys with SPIRE., Accepted for publication in Astronomy and Astrophysics (Herschel special issue)

Published
2010
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6. The Cluster HEritage project with XMM-Newton: Mass Assembly and Thermodynamics at the Endpoint of structure formation. I. Programme overview

Author

Alina Streblyanska, Raphael Gavazzi, I. Bartalucci, Mathilde Jauzac, P. S. Corasaniti, Paolo Tozzi, R. F. J. van der Burg, Jack Sayers, Mario Nonino, Dominique Eckert, Franco Vazza, M. Rossetti, S. Molendi, Christine Jones, A. Saro, Stefano Ettori, E. Rasia, A. Ferragamo, Nicolas Clerc, Jean-Baptiste Melin, Jose Alberto Rubino-Martin, Barbara Sartoris, Nobuhiro Okabe, R. T. Duffy, A. Iqbal, Sandrine Pires, F. Andrade-Santos, S. De Grandi, Rossella Cassano, F. Gastaldello, G. Schellenberger, Gustavo Yepes, Annalisa Bonafede, R. Barrena, Mauro Sereno, M. De Petris, Keiichi Umetsu, Etienne Pointecouteau, Paula Tarrío, Hervé Bourdin, Jean-Charles Cuillandre, Klaus Dolag, Chris P. Haines, Pasquale Mazzotta, S. Zarattini, Mario Radovich, Stefano Borgani, L. Salvati, Tiziana Venturi, M. Arnaud, Florian Kéruzoré, Simona Ghizzardi, David J. Barnes, Megan Donahue, Massimo Gaspari, S. Paltani, G. W. Pratt, Myriam Gitti, A. M. C. LeBrun, L. Perotto, S. Burkutean, F. Mayet, Scott T. Kay, Melanie Johnston-Hollitt, Lorenzo Lovisari, Herve Aussel, S. Maurogordato, Ben J Maughan, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano (IASF-MI), Istituto Nazionale di Astrofisica (INAF), University of Geneva [Switzerland], INAF-IASF Milano, 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), 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), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de Genève = University of Geneva (UNIGE), 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 Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-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)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS), Arnaud, M., Ettori, S., Pratt, G. W., Rossetti, M., Eckert, D., Gastaldello, F., Gavazzi, R., Kay, S. T., Lovisari, L., Maughan, B. J., Pointecouteau, E., Sereno, M., Bartalucci, I., Bonafede, A., Bourdin, H., Cassano, R., Duffy, R. T., Iqbal, A., Maurogordato, S., Rasia, E., Sayers, J., Andrade-Santos, F., Aussel, H., Barnes, D. J., Barrena, R., Borgani, S., Burkutean, S., Clerc, N., Corasaniti, P. -S., Cuillandre, J. -C., De Grandi, S., De Petris, M., Dolag, K., Donahue, M., Ferragamo, A., Gaspari, M., Ghizzardi, S., Gitti, M., Haines, C. P., Jauzac, M., Johnston-Hollitt, M., Jones, C., Keruzore, F., Lebrun, A. M. C., Mayet, F., Mazzotta, P., Melin, J. -B., Molendi, S., Nonino, M., Okabe, N., Paltani, S., Perotto, L., Pires, S., Radovich, M., Rubino-Martin, J. -A., Salvati, L., Saro, A., Sartoris, B., Schellenberger, G., Streblyanska, A., Tarrio, P., Tozzi, P., Umetsu, K., Van Der Burg, R. F. J., Vazza, F., Venturi, T., Yepes, G., Zarattini, S., Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), UAM.Departamento de Física Teórica, COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Arnaud M., Ettori S., Pratt G.W., Rossetti M., Eckert D., Gastaldello F., Gavazzi R., Kay S.T., Lovisari L., Maughan B.J., Pointecouteau E., Sereno M., Bartalucci I., Bonafede A., Bourdin H., Cassano R., Duffy R.T., Iqbal A., Maurogordato S., Rasia E., Sayers J., Andrade-Santos F., Aussel H., Barnes D.J., Barrena R., Borgani S., Burkutean S., Clerc N., Corasaniti P.-S., Cuillandre J.-C., De Grandi S., De Petris M., Dolag K., Donahue M., Ferragamo A., Gaspari M., Ghizzardi S., Gitti M., Haines C.P., Jauzac M., Johnston-Hollitt M., Jones C., Keruzore F., Lebrun A.M.C., Mayet F., Mazzotta P., Melin J.-B., Molendi S., Nonino M., Okabe N., Paltani S., Perotto L., Pires S., Radovich M., Rubino-Martin J.-A., Salvati L., Saro A., Sartoris B., Schellenberger G., Streblyanska A., Tarrio P., Tozzi P., Umetsu K., Van Der Burg R.F.J., Vazza F., Venturi T., Yepes G., and Zarattini S.

Subjects
Structure formation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, Dark matter, Population, Thermodynamics, FOS: Physical sciences, observation [Cosmology], Astrophysics, clusters: intracluster medium [Galaxies], Astrophysics::Cosmology and Extragalactic Astrophysics, clusters: general [Galaxies], Cosmology: observation, 01 natural sciences, Observations [Cosmology], law.invention, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, law, 0103 physical sciences, Cluster (physics), Planck, education, 010303 astronomy & astrophysics, Galaxy cluster, Physics, education.field_of_study, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Settore FIS/05, 010308 nuclear & particles physics, Cosmology: observations, Física, Galaxies: clusters: general, Galaxies: clusters: intracluster medium, Astronomy and Astrophysics, Astronomía, Dark matter halo, [SDU]Sciences of the Universe [physics], Space and Planetary Science, symbols, Hydrostatic equilibrium, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Cluster HEritage project with XMM-Newton - Mass Assembly and Thermodynamics at the Endpoint of structure formation (CHEX-MATE) is a three mega-second Multi-Year Heritage Programme to obtain X-ray observations of a minimally-biased, signal-to-noise limited sample of 118 galaxy clusters detected by Planck through the Sunyaev-Zeldovich effect. The programme, described in detail in this paper, aims to study the ultimate products of structure formation in time and mass. It is composed of a census of the most recent objects to have formed (Tier-1: 0.05 < z < 0.2; 2 x 10e14 M_sun < M_500 < 9 x 10e14 M_sun), together with a sample of the highest-mass objects in the Universe (Tier-2: z < 0.6; M_500 > 7.25 x 10e14 M_sun). The programme will yield an accurate vision of the statistical properties of the underlying population, measure how the gas properties are shaped by collapse into the dark matter halo, uncover the provenance of non-gravitational heating, and resolve the major uncertainties in mass determination that limit the use of clusters for cosmological parameter estimation. We will acquire X-ray exposures of uniform depth, designed to obtain individual mass measurements accurate to 15-20% under the hydrostatic assumption. We present the project motivations, describe the programme definition, and detail the ongoing multi-wavelength observational (lensing, SZ, radio) and theoretical effort that is being deployed in support of the project., 27 pages, 11 figures; A&A, in press

Published
2021

7. Mapping substructure in the HST Frontier Fields cluster lenses and in cosmological simulations

Author

Mark Vogelsberger, Marceau Limousin, Hakim Atek, Mathilde Jauzac, Lars Hernquist, Fangzhou Jiang, Federico Marinacci, Harald Ebeling, Johan Richard, Priyamvada Natarajan, Annalisa Pillepich, Frank C. van den Bosch, Urmila Chadayammuri, Cristina Popa, Massimo Meneghetti, Eric Jullo, Jean-Paul Kneib, Centre de Recherche Astrophysique de Lyon (CRAL), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Natarajan P, Chadayammuri U, Jauzac M, Richard J, Kneib J-P, Ebeling H, Jiang F, van den Bosch F, Limousin M, Jullo E, Atek H, Pillepich A, Popa C, Marinacci F, Hernquist L, Meneghetti M, and Vogelsberger M

Subjects
Cold dark matter, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark matter, galaxies:clusters:general, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Lambda, 01 natural sciences, Cosmology, dark matter, cosmology: theory, 0103 physical sciences, Cluster (physics), 010303 astronomy & astrophysics, Physics, 010308 nuclear & particles physics, Astronomy, Local Group, Astronomy and Astrophysics, cosmology:theory, Astrophysics - Astrophysics of Galaxies, galaxies: haloes, galaxies:haloes, Abell 2744, galaxies: clusters: general, galaxies: haloes, cosmology: theory, dark matter, large-scale structure of Universe, Space and Planetary Science, galaxies: clusters: general, Astrophysics of Galaxies (astro-ph.GA), Substructure, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We map the lensing-inferred substructure in the first three clusters observed by the Hubble Space Telescope Frontier Fields Initiative (HSTFF): Abell 2744 (z = 0.308), MACSJ0416, (z = 0.396) and MACSJ1149 (z = 0.543). Statistically resolving dark-matter subhaloes down to ~10^{9.5} solar masses, we compare the derived subhalo mass functions (SHMFs) to theoretical predictions from analytical models and with numerical simulations in a Lambda Cold Dark Matter (LCDM) cosmology. Mimicking our observational cluster member selection criteria in the HSTFF, we report excellent agreement in both amplitude and shape of the SHMF over four decades in subhalo mass (10^{9-13} solar masses). Projection effects do not appear to introduce significant errors in the determination of SHMFs from simulations. We do not find evidence for a substructure crisis, analogous to the missing satellite problem in the Local Group, on cluster scales, but rather excellent agreement of the count-matched HSTFF SHMF down to M_{sub halo}/M_{halo} ~ 10^{-5}. However, we do find discrepancies in the radial distribution of sub haloes inferred from HSTFF cluster lenses compared to determinations from simulated clusters. This suggests that although the selected simulated clusters match the HSTFF sample in mass, they do not adequately capture the dynamical properties and complex merging morphologies of these observed cluster lenses. Therefore, HSTFF clusters are likely observed in a transient evolutionary stage that is presently insufficiently sampled in cosmological simulations. The abundance and mass function of dark matter substructure in cluster lenses continues to offer an important test of the LCDM paradigm, and at present we find no tension between model predictions and observations., Comment: 20 pages, 29 figures, Accepted for publication, in press, MNRAS, replaced with added author affiliations and added reference

Published
2017

8. Strong-Lensing Analysis of MACS,J0717.5+3745 from Hubble Frontier Fields observations: How well can the mass distribution be constrained?

Author

Eric Jullo, Carlo Giocoli, Tomás Verdugo, Jean-Paul Kneib, Mathilde Jauzac, Hakim Atek, M. Rexroth, Marceau Limousin, Harald Ebeling, Johan Richard, Priya Natarajan, Brian Siana, M. Bonamigo, Anahita Alavi, Benjamin Clément, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Dark Cosmology Centre (DARK), Niels Bohr Institute [Copenhagen] (NBI), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), Ecole Polytechnique Fédérale de Lausanne (EPFL), Departamento de Fisica y Astronomia [Valparaiso], Universidad de Valparaiso [Chile], Department of Astronomy, Yale University [New Haven], California Institute of Technology (CALTECH), AUTRES, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Limousin, M., Richard, J., Jullo, E., Jauzac, M., Ebeling, H., Bonamigo, M., Alavi, A., Clement, B., Giocoli, Carlo, Kneib, J. P., Verdugo, T., Natarajan, P., Siana, B., Atek, H., and Rexroth, M.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Field (physics), Gravitational lensing: strong, media_common.quotation_subject, Dark matter, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Superposition principle, 0103 physical sciences, 010303 astronomy & astrophysics, Galaxy cluster, Parametric statistics, media_common, Physics, Mass distribution, 010308 nuclear & particles physics, Astronomy and Astrophysics, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Universe, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics of Galaxies (astro-ph.GA), Galaxies: clusters: individual: MACS J0717.5+3745, Degeneracy (mathematics), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

[abridged] We present a strong-lensing analysis of MACSJ0717.5+3745, based on the full depth of the Hubble Frontier Field (HFF) observations, which brings the number of multiply imaged systems to 61, ten of which are spectroscopically confirmed. The total number of images comprised in these systems rises to 165. Our analysis uses a parametric mass reconstruction technique, as implemented in the Lenstool software, to constrain a mass distribution composed of four large-scale mass components + galaxy-scale perturbers. We find a superposition of cored isothermal mass components to provide a good fit to the observational constraints, resulting in a very shallow mass distribution for the smooth (large-scale) component. Given the implications of such a flat mass profile, we investigate whether a model composed of "peaky" non-cored mass components can also reproduce the observational constraints. We find that such a non-cored mass model reproduces the observational constraints equally well. Although the total mass distributions of both models are consistent, as well as the integrated two dimensional mass profiles, we find that the smooth and the galaxy-scale components are very different. We conclude that, even in the HFF era, the generic degeneracy between smooth and galaxy-scale components is not broken, in particular in such a complex galaxy cluster. Consequently, insights into the mass distribution of MACS J0717 remain limited, underlining the need for additional probes beyond strong lensing. Our findings also have implications for estimates of the lensing magnification: we show that the amplification difference between the two models is larger than the error associated with either model. This uncertainty decreases the area of the image plane where we can reliably study the high-redshift Universe by 50 to 70%., A and A, in press

Published
2015

9. A shock front at the radio relic of Abell 2744

Author

Franco Vazza, Mathilde Jauzac, Huib Intema, Matt S. Owers, Kenda Knowles, C. Tchernin, Jean-Paul Kneib, Dominique Eckert, Eckert, D., Jauzac, M., Vazza, F., Owers, M. S., Kneib, J. -P., Tchernin, C., Intema, H., and Knowles, K.

Subjects
Shock wave, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Radio relics, galaxies: clusters: individual: A2744, 0103 physical sciences, Cluster (physics), 010303 astronomy & astrophysics, Galaxy cluster, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Astronomy and Astrophysic, X-rays: galaxies: cluster, Galaxy, Shock (mechanics), Abell 2744, Space and Planetary Science, X-rays: galaxies: clusters, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Radio relics are Mpc-scale diffuse radio sources at the peripheries of galaxy clusters which are thought to trace outgoing merger shocks. We present XMM-Newton and Suzaku observations of the galaxy cluster Abell 2744 (z=0.306), which reveal the presence of a shock front 1.5 Mpc East of the cluster core. The surface-brightness jump coincides with the position of a known radio relic. Although the surface-brightness jump indicates a weak shock with a Mach number $\mathcal{M}=1.7_{-0.3}^{+0.5}$, the plasma in the post-shock region has been heated to a very high temperature ($\sim13$ keV) by the passage of the shock wave. The low acceleration efficiency expected from such a weak shock suggests that mildly relativistic electrons have been re-accelerated by the passage of the shock front., Comment: 6 pages, 4 figures, MNRAS in press

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