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114 results on '"Baglin, A."'

1. Transiting exoplanets from the CoRoT space mission

Author

Bordé, P., primary, Díaz, R. F., additional, Creevey, O., additional, Damiani, C., additional, Deeg, H., additional, Klagyivik, P., additional, Wuchterl, G., additional, Gandolfi, D., additional, Fridlund, M., additional, Bouchy, F., additional, Aigrain, S., additional, Alonso, R., additional, Almenara, J.-M., additional, Baglin, A., additional, Barros, S. C. C., additional, Bonomo, A. S., additional, Cabrera, J., additional, Csizmadia, Sz., additional, Deleuil, M., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Guenther, E. W., additional, Guillot, T., additional, Grziwa, S., additional, Hatzes, A., additional, Hébrard, G., additional, Mazeh, T., additional, Ollivier, M., additional, Parviainen, H., additional, Pätzold, M., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, and Schneider, J., additional

Published
2020
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2. The pulsations of the B5IVe star HD 181231 observed with CoRoT and ground-based spectroscopy

Author

Monica Rainer, C. Buil, A. L. Huat, R. Samadi, Coralie Neiner, C. Catala, J. Suso, Juan Gutiérrez-Soto, Frédéric Baudin, Anne-Marie Hubert, A. Baglin, B. de Batz, Y. Frémat, T. Semaan, F. Espinosa Lara, Ennio Poretti, Fabien Carrier, Eduardo Janot-Pacheco, L. Andrade, P. D. Diago, Christophe Martayan, O. Thizy, Eric Michel, Marcelo Emilio, Michele Floquet, Juan Fabregat, B. Leroy, J Ribeiro, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-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), Physique stellaire et galactique, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Observatoire Royal de Belgique (ORB), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Observatori Astronòmic, Universitat de València, INAF-Osservatorio Astronomico di Brera (INAF-OAB), Institute of Astronomy, Katholieke Universiteit Leuven, Shelyak Instruments, Observatoire de Castanet-Tolosan, Obervatorio do Instituto Geografico do Exercito, Universidade de São Paulo, and Obervatório Astronômico, Universidade Estadual de Ponta Grossa

Subjects
Physics, Photosphere, Astronomy, Astronomy and Astrophysics, Context (language use), Astrophysics, Star (graph theory), Light curve, Magnetic field, Stars, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Emission spectrum, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Spectroscopy
Abstract

International audience; Context: HD 181231 is a B5IVe star, which has been observed with the CoRoT satellite during ~5 consecutive months and simultaneously from the ground in spectroscopy and spectropolarimetry. Aims: By analysing these data, we aim to detect and characterize as many pulsation frequencies as possible, to search for the presence of beating effects possibly at the origin of the Be phenomenon. Our results will also provide a basis for seismic modelling. Methods: The fundamental parameters of the star are determined from spectral fitting and from the study of the circumstellar emission. The CoRoT photometric data and ground-based spectroscopy are analysed using several Fourier techniques: Clean-ng, Pasper, and Tisaft, as well as a time-frequency technique. A search for a magnetic field is performed by applying the LSD technique to the spectropolarimetric data. Results: We find that HD 181231 is a B5IVe star seen with an inclination of ~45 degrees. No magnetic field is detected in its photosphere. We detect at least 10 independent significant frequencies of variations among the 54 detected frequencies, interpreted in terms of non-radial pulsation modes and rotation. Two longer-term variations are also detected: one at ~14 days resulting from a beating effect between the two main frequencies of short-term variations, the other at ~116 days due either to a beating of frequencies or to a zonal pulsation mode. Conclusions: Our analysis of the CoRoT light curve and ground-based spectroscopic data of HD 181231 has led to the determination of the fundamental and pulsational parameters of the star, including beating effects. This will allow a precise seismic modelling of this star.

Published
2009

3. Solar-like oscillations in HD 181420: data analysis of 156 days of CoRoT data

Author

Patrick Gaulme, Ian W. Roxburgh, Clara Régulo, Patrick Boumier, Graham A. Verner, Thierry Appourchaux, Jérôme Ballot, Rafael A. García, Savita Mathur, Reza Samadi, Benoit Mosser, C. Catala, M. Auvergne, Eric Michel, Frédéric Baudin, William J. Chaplin, A. Baglin, C. Barban, Sébastien Deheuvels, Hans Bruntt, Yvonne Elsworth, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), 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), School of Physics and Astronomy, University of Birmingham, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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 Paris Cité (UPCité), Instituto de Astrofísica de Canarias (IAC), Astronomy Unit, Queen Mary, and Indian Institute of Astrophysics

Subjects
Physics, Oscillation, Mode (statistics), Spectral density, Astronomy and Astrophysics, Context (language use), Astrophysics, Stars, Amplitude, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Solar-like oscillations, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Main sequence
Abstract

International audience; Context: The estimate of solar-like oscillation properties, such as their frequencies, amplitudes and lifetimes, is challenging because of their low amplitudes and will benefit from long and uninterrupted observing runs. The space telescope CoRoT allows us to obtain high-performance photometric data over a long and quasi continuous period. Among its main targets are stars for which we expect solar-like oscillations. Aims: HD 181420, an F2 main sequence star, has been observed by CoRoT during its first long run covering about 156 days. With this unprecedently high-quality set of data, our aim is to derive the p-mode parameters that can be used to probe the stellar interior. Methods: The CoRoT data obtained on HD 181420 is analysed using a classical Fourier approach for the search for the p mode signature. The p-mode parameters are then derived using global fitting of the power spectrum by a Lorentzian model, as used widely in the solar case. Results: From the p-mode frequencies, the mean value of the large spacing is estimated to be 75 {mu Hz}. The p-mode amplitudes are slightly less than 4 ppm with a line width of about 8 {mu Hz} at the maximum of the p modes. The inclination angle is estimated to be around 45 °. The large mode line-width combined with the observed mode spacing make it difficult to identify the l=2 modes and to estimate the rotational splitting. We explore two scenarios for the identification of the modes.

Published
2009

4. HD 50844: a new look atδScuti stars from CoRoT space photometry

Author

L. Mantegazza, K. Uytterhoeven, Eric Michel, M. Auvergne, Frédéric Baudin, C. Catala, E. Rodriguez, Ennio Poretti, R. Samadi, Juan Carlos Suárez, Susana Martín-Ruiz, Monica Rainer, M. Alvarez, Annie Baglin, Laure Lefèvre, Emese Plachy, R. Garrido, Péter Pápics, Philippe Mathias, M. Paparó, E. Niemczura, W. Zima, A. Moya, Pedro J. Amado, INAF-Osservatorio Astronomico di Brera (INAF-OAB), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Instituto de Astrofisica de Andalucia, CSIC (IAA), Astronomical Institute, University of Wroclaw, Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Observatorio Astronómico Nacional, Instituto de Astronomía, Universidad Nacional Autónoma de México, Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (1965 - 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, 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), and Konkoly Observatory, Research Center for Astronomy and Earth Sciences

Subjects
Physics, Frequency analysis, Flux, Astronomy, Astronomy and Astrophysics, Context (language use), Astrophysics, Light curve, Spectral line, law.invention, Photometry (optics), Stars, Amplitude, [SDU]Sciences of the Universe [physics], Space and Planetary Science, law, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Context: Aims: This work presents the results obtained by CoRoT on HD 50844, the only delta Sct star observed in the CoRoT initial run (57.6 d). The aim of these CoRoT observations was to investigate and characterize for the first time the pulsational behaviour of a delta Sct star, when observed at a level of precision and with a much better duty cycle than from the ground. Methods: The 140 016 datapoints were analysed using independent approaches (SigSpec software and different iterative sine-wave fittings) and several checks performed (splitting of the timeseries in different subsets, investigation of the residual light curves and spectra). A level of 10-5 mag was reached in the amplitude spectra of the CoRoT timeseries. The space monitoring was complemented by ground-based high-resolution spectroscopy, which allowed the mode identification of 30 terms. Results: The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0-30 d-1. All the cross-checks confirmed this new result. The initial guess that delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high-degree modes (up to l=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to these modes at the noise level of the CoRoT measurements. The ground-based observations indicate that HD 50844 is an evolved star that is slightly underabundant in heavy elements, located on the Terminal Age Main Sequence. Probably due to this unfavourable evolutionary status, no clear regular distribution is observed in the frequency set. The predominant term (f_1=6.92 d-1) has been identified as the fundamental radial mode combining ground-based photometric and spectroscopic data. Conclusions

Published
2009

5. CoRoT's view of newly discovered B-star pulsators: results for 358 candidate B pulsators from the initial run's exoplanet field data

Author

Michel Auvergne, Alfred F. Noels, J. Cuypers, W. W. Weiss, L. Balaguer-Núñez, Conny Aerts, Ignasi Ribas, M. Ollivier, Frédéric Baudin, Anne Thoul, Laurent Jorda, Maryline Briquet, Carla Maceroni, Magali Deleuil, P. De Cat, Andrea Miglio, Reza Samadi, Pieter Degroote, Annie Baglin, Josefina Montalbán, J. Debosscher, Institute of Astronomy, Katholieke Universiteit Leuven, Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Institut d'Astrophysique, Géophysique et Océanographie, Université de Liège, Koninklijke Sterrenwacht van België, Departament d'Astronomia i Meteorologia [Barcelona] (DAM), Universitat de Barcelona (UB), INAF-Osservatorio Astronomico di Roma (INAF-OAR), Institut de Ciencies de l'Espai (ICE), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), 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), and Universität Wien

Subjects
oscillations [stars], spaced data, opacity mechanism, Astronomy, FOS: Physical sciences, Astrophysics, Star (graph theory), 01 natural sciences, Instability, nyquist frequency, effective temperature, variable-stars, Planet, beta-cephei stars, pulsational frequency-analysis, 0103 physical sciences, data analysis [methods], Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Solar and Stellar Astrophysics (astro-ph.SR), Physics, 010308 nuclear & particles physics, time-series, photometric-observations, Astronomy and Astrophysics, Effective temperature, Exoplanet, Photometry (astronomy), Stars, Amplitude, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, variables: general [stars], order g-modes, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We search for new variable B-type pulsators in the CoRoT data assembled primarily for planet detection, as part of CoRoT's Additional Programme. We aim to explore the properties of newly discovered B-type pulsators from the uninterrupted CoRoT space-based photometry and to compare them with known members of the Beta Cep and slowly pulsating B star (SPB) classes. We developed automated data analysis tools that include algorithms for jump correction, light-curve detrending, frequency detection, frequency combination search, and for frequency and period spacing searches. Besides numerous new, classical, slowly pulsating B stars, we find evidence for a new class of low-amplitude B-type pulsators between the SPB and Delta Sct instability strips, with a very broad range of frequencies and low amplitudes, as well as several slowly pulsating B stars with residual excess power at frequencies typically a factor three above their expected g-mode frequencies. The frequency data we obtained for numerous new B-type pulsators represent an appropriate starting point for further theoretical analyses of these stars, once their effective temperature, gravity, rotation velocity, and abundances will be derived spectroscopically in the framework of an ongoing FLAMES survey at the VLT., Comment: 22 pages, 30 figures, accepted for publication in A&A

Published
2009

6. Transiting exoplanets from the CoRoT space mission

Author

Amaury H. M. J. Triaud, Roi Alonso, Suzanne Aigrain, P. Gondoin, Didier Queloz, Michel Auvergne, Artie P. Hatzes, François Bouchy, Annie Baglin, Tristan Guillot, B. Loeillet, Pierre Magain, M. Ollivier, Helmut Lammer, Stéphane Udry, Rudolf Dvorak, Frederic Pont, G. Wuchterl, Michel Mayor, Laurent Jorda, R. de la Reza, J. Schneider, Malcolm Fridlund, Antoine Llebaria, C. Moutou, Pierre Barge, Magali Deleuil, Hans J. Deeg, Francesco Pepe, Martin Pätzold, Guillaume Hébrard, Heike Rauer, Pascal Bordé, A. Léger, Anders Erikson, Willy Benz, Daniel Rouan, 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), Observatoire Astronomique de l'Université de Genève, 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), Thüringer Landessternwarte, Tautenburg Observatory, University of Exeter, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, 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 Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Physikalisches Institut, Universität Bern, Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Instituto de Astrofísica de Canarias (IAC), Observatório Nacional/MCTI, Institut für Astronomie, Universität Wien (IfA), Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Research and Scientific Support Department, ESA-ESTEC (RSSD), Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut für Weltraumforschung, Österreichische Akademie der Wissenschaften (IWF), Institut d'Astrophysique, Géophysique et Océanographie, Université de Liège, Institut für Geophysik und Meteorologie, Universität zu Köln (IGM), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève (UNIGE), 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), Thüringer Landessternwarte Tautenburg (TLS), School of Physics, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Physikalisches Institut [Bern], Universität Bern [Bern], Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Astrofisica de Canarias (IAC), ON/MCT (ON/MCT, 20921-030, Rio de Janeiro, Brazil)), ON/MCT, DLR Institute of Planetary Research, German Aerospace Center (DLR), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), Geneva Observatory, University of Geneva [Switzerland], Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), 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, 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), Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), European Southern Observatory (ESO), Institute for Geophysics and Meteorology [Köln] (IGM), University of Cologne, Observatoire de Paris - Site de Paris (OP), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), Departement de recherche SPAtiale (DESPA), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Genève = University of Geneva (UNIGE), Universität Bern [Bern] (UNIBE), 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), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Université Nice Sophia Antipolis (1965 - 2019) (UNS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), PSL Research University (PSL)-PSL Research University (PSL), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Department of Palaeontology - Institute of Geology, and Bergakademie Freiberg

Subjects
spectroscopy, photometry, FOS: Physical sciences, Exo-2b, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Space (mathematics), 01 natural sciences, Spectral line, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Spectral analysis, Transit (astronomy), 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Exoplanet, CoRoT, Radial velocity, exoplanets, transit method, 13. Climate action, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We report on the spectroscopic transit of the massive hot-Jupiter CoRoT-Exo-2b observed with the high-precision spectrographs SOPHIE and HARPS. By modeling the radial velocity anomaly occurring during the transit due to the Rossiter-McLaughlin (RM) effect, we determine the sky-projected angle between the stellar spin and the planetary orbital axis to be close to zero lambda=7.2+-4.5 deg, and we secure the planetary nature of CoRoT-Exo-2b. We discuss the influence of the stellar activity on the RM modeling. Spectral analysis of the parent star from HARPS spectra are presented., A&A Letters (in press), 5 pages, 2 figures

Published
2008

7. The efficient photodesorption of nitric oxide (NO) ices

Author

Dupuy, R., primary, Féraud, G., additional, Bertin, M., additional, Michaut, X., additional, Putaud, T., additional, Jeseck, P., additional, Philippe, L., additional, Romanzin, C., additional, Baglin, V., additional, Cimino, R., additional, and Fillion, J.-H., additional

Published
2017
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8. Galactic archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE

Author

Anders, F., primary, Chiappini, C., additional, Rodrigues, T. S., additional, Miglio, A., additional, Montalbán, J., additional, Mosser, B., additional, Girardi, L., additional, Valentini, M., additional, Noels, A., additional, Morel, T., additional, Johnson, J. A., additional, Schultheis, M., additional, Baudin, F., additional, de Assis Peralta, R., additional, Hekker, S., additional, Themeßl, N., additional, Kallinger, T., additional, García, R. A., additional, Mathur, S., additional, Baglin, A., additional, Santiago, B. X., additional, Martig, M., additional, Minchev, I., additional, Steinmetz, M., additional, da Costa, L. N., additional, Maia, M. A. G., additional, Allende Prieto, C., additional, Cunha, K., additional, Beers, T. C., additional, Epstein, C., additional, García Pérez, A. E., additional, García-Hernández, D. A., additional, Harding, P., additional, Holtzman, J., additional, Majewski, S. R., additional, Mészáros, Sz., additional, Nidever, D., additional, Pan, K., additional, Pinsonneault, M., additional, Schiavon, R. P., additional, Schneider, D. P., additional, Shetrone, M. D., additional, Stassun, K., additional, Zamora, O., additional, and Zasowski, G., additional

Published
2016
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10. Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150, and HD 46966

Author

Blomme, R., Mahy, L., Catala, C., Cuypers, J., Gosset, E., Godart, M., Montalban, J., Ventura, P., Rauw, G., Morel, T., Degroote, P., Aerts, C., Noels, A., Michel, E., Baudin, F., Baglin, A., Auvergne, M., Samadi, R., Blomme, Mahy, Catala, Cuypers, Gosset, Godart, Montalban, Ventura, Rauw, Morel, Degroote, Aerts, Noels, Michel, Baudin, Baglin, Auvergne, and Samadi

Published
2011

11. Comparative seismology of pre- and main sequence stars in the instability strip

Author

Marie-Jo Goupil, Yveline Lebreton, Annie Baglin, C. Catala, and M. D. Suran

Subjects
Physics, Opacity, Oscillation, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Low frequency, Stars, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Frequency distribution, Instability strip, Astrophysics::Galaxy Astrophysics, Main sequence, Sequence (medicine)
Abstract

Pulsational properties of 1.8 M$_{\odot}$ stellar models covering the latest stages of contraction toward the main sequence up to early hydrogen burning phases are investigated by means of linear nonadiabatic analyses. Results confirm that pre-main sequence stars (pms) which cross the classical instability strip on their way toward the main sequence are pulsationally unstable with respect to the classical opacity mechanisms. For both pms and main sequence types of models in the lower part of the instability strip, the unstable frequency range is found to be roughly the same. Some non-radial unstable modes are very sensitive to the deep internal structure of the star. It is shown that discrimination between pms and main sequence stages is possible using differences in their oscillation frequency distributions in the low frequency range., 8 pages, 9 figures, accepted for publication in A&A

Published
2001

13. Transiting exoplanets from the CoRoT space mission

Author

Csizmadia, Sz., primary, Hatzes, A., additional, Gandolfi, D., additional, Deleuil, M., additional, Bouchy, F., additional, Fridlund, M., additional, Szabados, L., additional, Parviainen, H., additional, Cabrera, J., additional, Aigrain, S., additional, Alonso, R., additional, Almenara, J.-M., additional, Baglin, A., additional, Bordé, P., additional, Bonomo, A. S., additional, Deeg, H. J., additional, Díaz, R. F., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Tadeu dos Santos, M., additional, Guenther, E. W., additional, Guillot, T., additional, Grziwa, S., additional, Hébrard, G., additional, Klagyivik, P., additional, Ollivier, M., additional, Pätzold, M., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, Schneider, J., additional, Mazeh, T., additional, Wuchterl, G., additional, Carpano, S., additional, and Ofir, A., additional

Published
2015
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14. The variability behaviour of CoRoT M-giant stars

Author

Ferreira Lopes, C. E., primary, Neves, V., additional, Leão, I. C., additional, de Freitas, D. B., additional, Canto Martins, B. L., additional, da Costa, A. D., additional, Paz-Chinchón, F., additional, Das Chagas, M. L., additional, Baglin, A., additional, Janot-Pacheco, E., additional, and De Medeiros, J. R., additional

Published
2015
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15. Study of HD 169392A observed by CoRoT and HARPS

Author

M. Steslicki, Ian W. Roxburgh, Rasmus Handberg, M. Rainer, Yvonne Elsworth, L. Mantegazza, William J. Chaplin, Frédéric Baudin, A. Baglin, T. Roca Cortés, R. Samadi, S. Barceló Forteza, Clara Régulo, C. Catala, Graham A. Verner, S. Hekker, Rafael A. García, B. Mosser, E. Michel, Guy R. Davies, J. Ballot, Othman Benomar, E. Poretti, H. Bruntt, D. Salabert, M. Auvergne, S. Mathur, K. Uytterhoeven, Low Energy Astrophysics (API, FNWI), Joseph Louis LAGRANGE (LAGRANGE), 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, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, FOS: Physical sciences, Astrophysics, Double star, asteroseismology, 01 natural sciences, Asteroseismology, Measure (mathematics), Space exploration, 0103 physical sciences, 010303 astronomy & astrophysics, Stellar evolution, ComputingMilieux_MISCELLANEOUS, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Physics, Mode (statistics), Astronomy and Astrophysics, Radius, methods: data analysis, Stars, stars: individual: HD 169392, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, stars: oscillations, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

The numerous results obtained with asteroseismology thanks to space missions such as CoRoT and Kepler are providing a new insight on stellar evolution. After five years of observations, CoRoT is going on providing high-quality data. We present here the analysis of the double star HD169392 complemented by ground-based spectroscopic observations. This work aims at characterizing the fundamental parameters of the two stars, their chemical composition, the acoustic-mode global parameters including their individual frequencies, and their dynamics. We have analysed HARPS observations of the two stars to retrieve their chemical compositions. Several methods have been used and compared to measure the global properties of acoustic modes and their individual frequencies from the photometric data of CoRoT. The new spectroscopic observations and archival astrometric values suggest that HD169392 is a wide binary system weakly bounded. We have obtained the spectroscopic parameters for both components, suggesting the origin from the same cloud. However, only the mode signature of HD169392 A has been measured within the CoRoT data. The signal-to-noise ratio of the modes in HD169392B is too low to allow any confident detection. We were able to extract mode parameters of modes for l=0, 1, 2, and 3. The study of the splittings and inclination angle gives two possible solutions with splittings and inclination angles of 0.4-1.0 muHz and 20-40 degrees for one case and 0.2-0.5 muHz and 55-86 degrees for the other case. The modeling of this star with the Asteroseismic Modeling Portal led to a mass of 1.15+/-0.01 Ms, a radius of 1.88+/-0.02 Rs, and an age of 4.33+/-0.12 Gyr, where the uncertainties are the internal ones., Comment: 13 pages, 12 Figures, Accepted for publication in A&A

Published
2013

16. Mixed modes in red-giant stars observed with CoRoT

Author

K. Belkacem, M. J. Goupil, Frédéric Baudin, Eric Michel, Reza Samadi, Michel Auvergne, C. Barban, Marc-Antoine Dupret, Andrea Miglio, J. De Ridder, Benoit Mosser, Y. P. Elsworth, Paul G. Beck, Josefina Montalbán, Saskia Hekker, Annie Baglin, Claude Catala, Alfred F. Noels, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Etoile, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), 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)-Université Paris Cité (UPCité)-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)-Université Paris Cité (UPCité), Institut d'Astrophysique, Géophysique et Océanographie, Université de Liège, Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), School of Physics and Astronomy, University of Birmingham, and Low Energy Astrophysics (API, FNWI)

Subjects
Red giant, Population, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, 7. Clean energy, Gravitation, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Envelope (mathematics), education, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, 010308 nuclear & particles physics, Oscillation, Autocorrelation, Astronomy and Astrophysics, Light curve, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Context. The CoRoT mission has provided thousands of red-giant light curves. The analysis of their solar-like oscillations allows us to characterize their stellar properties. Aims: Up to now, the global seismic parameters of the pressure modes have been unable to distinguish red-clump giants from members of the red-giant branch. As recently done with Kepler red giants, we intend to analyze and use the so-called mixed modes to determine the evolutionary status of the red giants observed with CoRoT. We also aim at deriving different seismic characteristics depending on evolution. Methods: The complete identification of the pressure eigenmodes provided by the red-giant universal oscillation pattern allows us to aim at the mixed modes surrounding the l = 1 expected eigenfrequencies. A dedicated method based on the envelope autocorrelation function is proposed to analyze their period separation. Results: We have identified the mixed-mode signature separation thanks to their pattern that is compatible with the asymptotic law of gravity modes. We have shown that, independent of any modeling, the g-mode spacings help to distinguish the evolutionary status of a red-giant star. We then report the different seismic and fundamental properties of the stars, depending on their evolutionary status. In particular, we show that high-mass stars of the secondary clump present very specific seismic properties. We emphasize that stars belonging to the clump were affected by significant mass loss. We also note significant population and/or evolution differences in the different fields observed by CoRoT.

Published
2011

17. Rotation period distribution of CoRoT andKeplerSun-like stars

Author

Leão, I. C., primary, Pasquini, L., additional, Ferreira Lopes, C. E., additional, Neves, V., additional, Valcarce, A. A. R., additional, de Oliveira, L. L. A., additional, Freire da Silva, D., additional, de Freitas, D. B., additional, Canto Martins, B. L., additional, Janot-Pacheco, E., additional, Baglin, A., additional, and De Medeiros, J. R., additional

Published
2015
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18. Models of red giants in the CoRoT asteroseismology fields combining asteroseismic and spectroscopic constraints

Author

Lagarde, N., primary, Miglio, A., additional, Eggenberger, P., additional, Morel, T., additional, Montalbán, J., additional, Mosser, B., additional, Rodrigues, T. S., additional, Girardi, L., additional, Rainer, M., additional, Poretti, E., additional, Barban, C., additional, Hekker, S., additional, Kallinger, T., additional, Valentini, M., additional, Carrier, F., additional, Hareter, M., additional, Mantegazza, L., additional, Elsworth, Y., additional, Michel, E., additional, and Baglin, A., additional

Published
2015
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19. Transiting exoplanets from the CoRoT space mission

Author

Cabrera, J., primary, Csizmadia, Sz., additional, Montagnier, G., additional, Fridlund, M., additional, Ammler-von Eiff, M., additional, Chaintreuil, S., additional, Damiani, C., additional, Deleuil, M., additional, Ferraz-Mello, S., additional, Ferrigno, A., additional, Gandolfi, D., additional, Guillot, T., additional, Guenther, E. W., additional, Hatzes, A., additional, Hébrard, G., additional, Klagyivik, P., additional, Parviainen, H., additional, Pasternacki, Th., additional, Pätzold, M., additional, Sebastian, D., additional, Tadeu dos Santos, M., additional, Wuchterl, G., additional, Aigrain, S., additional, Alonso, R., additional, Almenara, J.-M., additional, Armstrong, J. D., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Barros, S. C. C., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Carpano, S., additional, Chaffey, C., additional, Deeg, H. J., additional, Díaz, R. F., additional, Dvorak, R., additional, Erikson, A., additional, Grziwa, S., additional, Korth, J., additional, Lammer, H., additional, Lindsay, C., additional, Mazeh, T., additional, Moutou, C., additional, Ofir, A., additional, Ollivier, M., additional, Pallé, E., additional, Rauer, H., additional, Rouan, D., additional, Samuel, B., additional, Santerne, A., additional, and Schneider, J., additional

Published
2015
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21. Transiting exoplanets from the CoRoT space mission

Author

Alonso, R., primary, Moutou, C., additional, Endl, M., additional, Almenara, J.-M., additional, Guenther, E. W., additional, Deleuil, M., additional, Hatzes, A., additional, Aigrain, S., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Cavarroc, C., additional, Cabrera, J., additional, Carpano, S., additional, Csizmadia, Sz., additional, Cochran, W. D., additional, Deeg, H. J., additional, Díaz, R. F., additional, Dvorak, R., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Fruth, T., additional, Gandolfi, D., additional, Gillon, M., additional, Grziwa, S., additional, Guillot, T., additional, Hébrard, G., additional, Jorda, L., additional, Léger, A., additional, Lammer, H., additional, Lovis, C., additional, MacQueen, P. J., additional, Mazeh, T., additional, Ofir, A., additional, Ollivier, M., additional, Pasternacki, T., additional, Pätzold, M., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, Schneider, J., additional, Tadeu dos Santos, M., additional, Tingley, B., additional, Titz-Weider, R., additional, Weingrill, J., additional, and Wuchterl, G., additional

Published
2014
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22. HD 51844: An AmδScuti in a binary showing periastron brightening

Author

Hareter, M., primary, Paparó, M., additional, Weiss, W., additional, García Hernández, A., additional, Borkovits, T., additional, Lampens, P., additional, Rainer, M., additional, De Cat, P., additional, Marcos-Arenal, P., additional, Vos, J., additional, Poretti, E., additional, Baglin, A., additional, Michel, E., additional, Baudin, F., additional, and Catala, C., additional

Published
2014
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23. Seismic analysis of HD 43587Aa, a solar-like oscillator in a multiple system

Author

Boumier, P., primary, Benomar, O., additional, Baudin, F., additional, Verner, G., additional, Appourchaux, T., additional, Lebreton, Y., additional, Gaulme, P., additional, Chaplin, W., additional, García, R. A., additional, Hekker, S., additional, Regulo, C., additional, Salabert, D., additional, Stahn, T., additional, Elsworth, Y., additional, Gizon, L., additional, Hall, M., additional, Mathur, S., additional, Michel, E., additional, Morel, T., additional, Mosser, B., additional, Poretti, E., additional, Rainer, M., additional, Roxburgh, I., additional, do Nascimento Jr., J.-D., additional, Samadi, R., additional, Auvergne, M., additional, Chaintreuil, S., additional, Baglin, A., additional, and Catala, C., additional

Published
2014
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24. Transiting exoplanets from the CoRoT space mission

Author

Parviainen, H., primary, Gandolfi, D., additional, Deleuil, M., additional, Moutou, C., additional, Deeg, H. J., additional, Ferraz-Mello, S., additional, Samuel, B., additional, Csizmadia, Sz., additional, Pasternacki, T., additional, Wuchterl, G., additional, Havel, M., additional, Fridlund, M., additional, Angus, R., additional, Tingley, B., additional, Grziwa, S., additional, Korth, J., additional, Aigrain, S., additional, Almenara, J. M., additional, Alonso, R., additional, Baglin, A., additional, Barros, S. C. C., additional, Bordé, P., additional, Bouchy, F., additional, Cabrera, J., additional, Díaz, R. F., additional, Dvorak, R., additional, Erikson, A., additional, Guillot, T., additional, Hatzes, A., additional, Hébrard, G., additional, Mazeh, T., additional, Montagnier, G., additional, Ofir, A., additional, Ollivier, M., additional, Pätzold, M., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, and Schneider, J., additional

Published
2014
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25. A search for pulsations in the HgMn star HD 45975 with CoRoT photometry and ground-based spectroscopy

Author

Morel, T., primary, Briquet, M., additional, Auvergne, M., additional, Alecian, G., additional, Ghazaryan, S., additional, Niemczura, E., additional, Fossati, L., additional, Lehmann, H., additional, Hubrig, S., additional, Ulusoy, C., additional, Damerdji, Y., additional, Rainer, M., additional, Poretti, E., additional, Borsa, F., additional, Scardia, M., additional, Schmid, V. S., additional, Van Winckel, H., additional, De Smedt, K., additional, Pápics, P. I., additional, Gameiro, J. F., additional, Waelkens, C., additional, Fagas, M., additional, Kamiński, K., additional, Dimitrov, W., additional, Baglin, A., additional, Michel, E., additional, Dumortier, L., additional, Frémat, Y., additional, Hensberge, H., additional, Jorissen, A., additional, and Van Eck, S., additional

Published
2013
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26. Stellar granulation as seen in disk-integrated intensity

Author

Samadi, R., primary, Belkacem, K., additional, Ludwig, H.-G., additional, Caffau, E., additional, Campante, T. L., additional, Davies, G. R., additional, Kallinger, T., additional, Lund, M. N., additional, Mosser, B., additional, Baglin, A., additional, Mathur, S., additional, and Garcia, R. A., additional

Published
2013
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27. An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy

Author

García Hernández, A., primary, Moya, A., additional, Michel, E., additional, Suárez, J. C., additional, Poretti, E., additional, Martín-Ruíz, S., additional, Amado, P. J., additional, Garrido, R., additional, Rodríguez, E., additional, Rainer, M., additional, Uytterhoeven, K., additional, Rodrigo, C., additional, Solano, E., additional, Rodón, J. R., additional, Mathias, P., additional, Rolland, A., additional, Auvergne, M., additional, Baglin, A., additional, Baudin, F., additional, Catala, C., additional, and Samadi, R., additional

Published
2013
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28. Revisiting CoRoT RR Lyrae stars: detection of period doubling and temporal variation of additional frequencies

Author

J. F. Le Borgne, József Benkő, W. W. Weiss, Ennio Poretti, E. Guggenberger, M. Paparó, Katrien Kolenberg, Róbert Szabó, E. Chapellier, Annie Baglin, Joseph Louis LAGRANGE (LAGRANGE), 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, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-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), Université Nice Sophia Antipolis (1965 - 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, 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), 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), and 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)

Subjects
[PHYS]Physics [physics], Period-doubling bifurcation, Physics, Blazhko effect, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, RR Lyrae variable, Light curve, Asteroseismology, Stars, Amplitude, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, stars, variables, RR Lyrae oscillations, interiors, techniques, photometric, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Variation (astronomy), ComputingMilieux_MISCELLANEOUS, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We search for signs of period doubling in CoRoT RR Lyrae stars. The occurrence of this dynamical effect in modulated RR Lyrae stars might help us to gain more information about the mysterious Blazhko effect. The temporal variability of the additional frequencies in representatives of all subtypes of RR Lyrae stars is also investigated. We pre-process CoRoT light curves by applying trend and jump correction and outlier removal. Standard Fourier technique is used to analyze the frequency content of our targets and follow the time dependent phenomena. The most comprehensive collection of CoRoT RR Lyrae stars, including new discoveries is presented and analyzed. We found alternating maxima and in some cases half-integer frequencies in four CoRoT Blazhko RR Lyrae stars, as clear signs of the presence of period doubling. This reinforces that period doubling is an important ingredient to understand the Blazhko effect - a premise we derived previously from the Kepler RR Lyrae sample. As expected, period doubling is detectable only for short time intervals in most modulated RRab stars. Our results show that the temporal variability of the additional frequencies in all RR Lyrae sub-types is ubiquitous. The ephemeral nature and the highly variable amplitude of these variations suggest a complex underlying dynamics of and an intricate interplay between radial and possibly nonradial modes in RR Lyrae stars. The omnipresence of additional modes in all types of RR Lyrae - except in non-modulated RRab stars - implies that asteroseismology of these objects should be feasible in the near future (Abridged)., Comment: 20 pages, 13 figures, accepted for publication in A&A

Published
2014

29. Transiting exoplanets from the CoRoT space mission

Author

Jean Schneider, Sascha Grziwa, Laurent Jorda, C. Lovis, Sylvio Ferraz-Mello, A. S. Bonomo, Roi Alonso, Rodrigo F. Díaz, M. Tadeu dos Santos, Magali Deleuil, Michael Endl, D. Rouan, J. Weingrill, Suzanne Aigrain, M. Pätzold, François Bouchy, Thomas Fruth, A. P. Hatzes, C. Cavarroc, M. Fridlund, A. Léger, J. Cabrera, Hans J. Deeg, Tristan Guillot, D. Queloz, Helmut Lammer, Brandon Tingley, Sz. Csizmadia, Pierre Barge, William D. Cochran, Alexandre Santerne, Günther Wuchterl, C. Moutou, Pascal Bordé, J. M. Almenara, Eike W. Guenther, Stefania Carpano, A. Baglin, Rudolf Dvorak, Davide Gandolfi, M. Auvergne, Tsevi Mazeh, Aviv Ofir, G. Hebrard, T. Pasternacki, Ruth Titz-Weider, Heike Rauer, Phillip J. MacQueen, Michaël Gillon, Anders Erikson, Marc Ollivier, Departamento de Matemàtica, PUC RIO, Canada-France-Hawaii Telescope Corporation (CFHT), National Research Council of Canada (NRC)-Centre National de la Recherche Scientifique (CNRS)-University of Hawai'i [Honolulu] (UH), Instituto de Astrofisica de Canarias (IAC), 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), Thüringer Landessternwarte Tautenburg (TLS), School of Physics, University of Exeter, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), 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), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 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), Institute of Astronomy, University of Vienna [Vienna], DLR Institute of Planetary Research, German Aerospace Center (DLR), Instituto de Astronomia, Geofísica e Ciências Atmosféricas [São Paulo] (IAG), Universidade de São Paulo = University of São Paulo (USP), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Department of Brain and Behavioural Sciences, Università degli Studi di Pavia = University of Pavia (UNIPV), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 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, 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), Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève = University of Geneva (UNIGE), School of Physics and Astronomy [Tel Aviv] (TAU), Raymond and Beverly Sackler Faculty of Exact Sciences [Tel Aviv] (TAU), Tel Aviv University (TAU)-Tel Aviv University (TAU), Rhenish Institute for Environmental Research (RIU), University of Cologne, DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Centro de Astrofísica da Universidade do Porto (CAUP), Universidade do Porto = University of Porto, Laboratoire Univers et Théories (LUTH (UMR_8102)), and Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
Techniques: spectroscopic, FOS: Physical sciences, Astrophysics, Star (graph theory), Planetary systems, Techniques: photometric, Techniques: radial velocities, Astronomy and Astrophysics, Space and Planetary Science, Space (mathematics), spectroscopic [Techniques], ​planetary systems – techniques: photometric – techniques: radial velocities – techniques: spectroscopic, Planet, Low density, ComputingMilieux_MISCELLANEOUS, Earth and Planetary Astrophysics (astro-ph.EP), [PHYS]Physics [physics], Physics, Orbital elements, radial velocities [Techniques], photometric [Techniques], Planetary system, Light curve, ESPECTROSCOPIA, Exoplanet, 13. Climate action, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Earth and Planetary Astrophysics
Abstract

We present the discovery of a candidate multiply-transiting system, the first one found in the CoRoT mission. Two transit-like features with periods of 5.11 and 11.76d are detected in the CoRoT light curve, around a main sequence K1V star of r=15.1. If the features are due to transiting planets around the same star, these would correspond to objects of 3.7$\pm$0.4 and 5.0$\pm$0.5 R_earth respectively. Several radial velocities serve to provide an upper limit of 5.7 M_earth for the 5.11~d signal, and to tentatively measure a mass of 28$^{+11}_{-11}$ M_earth for the object transiting with a 11.76~d period. These measurements imply low density objects, with a significant gaseous envelope. The detailed analysis of the photometric and spectroscopic data serve to estimate the probability that the observations are caused by transiting Neptune-sized planets as $>$26$\times$ higher than a blend scenario involving only one transiting planet, and $>$900$\times$ higher than a scenario involving two blends and no planets. The radial velocities show a long term modulation that might be attributed to a 1.5 M_jup planet orbiting at 1.8~A.U. from the host, but more data are required to determine the precise orbital parameters of this companion., 13 pages, 13 figures, accepted to A&A, minor typos corrected

Published
2014

30. Seismic analysis of HD 43587Aa, a solar-like oscillator in a multiple system

Author

T. Stahn, S. Mathur, R. Samadi, S. Hekker, Laurent Gizon, T. Appourchaux, Yveline Lebreton, C. Catala, Patrick Gaulme, Othman Benomar, M. Hall, P. Boumier, Ian W. Roxburgh, Clara Régulo, Graham A. Verner, E. Poretti, B. Mosser, T. Morel, A. Baglin, F. Baudin, J. D. do Nascimento, D. Salabert, M. Auvergne, R. A. Garcia, E. Michel, William J. Chaplin, Yvonne Elsworth, M. Rainer, S. Chaintreuil, Low Energy Astrophysics (API, FNWI), 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), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-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 de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), School of Physics and Astronomy, University of Birmingham [Birmingham], Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 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, 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), Insituto Geofísico, Escuela Politécnica Nacional (EPN), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université de Liège, INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), 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, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, stars: individual: HD 43587Aa, FOS: Physical sciences, Orbital eccentricity, Astrophysics, asteroseismology, Star (graph theory), stars, HD 43587Aa, binaries, solar-type, data analysis, Rotation, 01 natural sciences, Apparent magnitude, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Physics, Astronomy and Astrophysics, stars: solar-type, Radius, Effective temperature, methods: data analysis, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Radial velocity, binaries: general, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Context. The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary High Accuracy Radial velocity Planet Searcher (HARPS) spectra with S/N > 300 were also obtained. Its visual magnitude is 5.71, and its effective temperature is close to 5950 K. It has a known companion in a highly eccentric orbit and is also coupled with two more distant companions.Aims. We undertake a preliminary investigation of the internal structure of HD 43587Aa.Methods. We carried out a seismic analysis of the star, using maximum likelihood estimators and Markov chain Monte Carlo methods.Results. We established the first table of the eigenmode frequencies, widths, and heights for HD 43587Aa. The star appears to have a mass and a radius slightly larger than the Sun, and is slightly older (5.6 Gyr). Two scenarios are suggested for the geometry of the star: either its inclination angle is very low, or the rotation velocity of the star is very low.Conclusions. A more detailed study of the rotation and of the magnetic and chromospheric activity for this star is needed, and will be the subject of a further study. New high resolution spectrometric observations should be performed for at least several months in duration.

Published
2014

31. An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy

Author

Claude Catala, P. Mathias, R. Garrido, Juan Carlos Suárez, Enrique Solano, K. Uytterhoeven, A. Baglin, Susana Martín-Ruiz, A. Rolland, Monica Rainer, J. R. Rodón, Ennio Poretti, Eric Michel, A. García Hernández, Pedro J. Amado, Frédéric Baudin, Carlos Rodrigo, A. Moya, M. Auvergne, E. Rodríguez, Reza Samadi, Institut Cavanilles de Biodiversitat i Biologia Evolutiva (ICBiBE), Universitat de València (UV), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Instituto IMDEA Nanociencia [Madrid], Instituto Imdea Nanociencia, Spanish Virtual Observatory - Observatorio Virtual Español (SVO), Spanish Virtual Observatory - Observatorio Virtual Español, 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), Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (1965 - 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, 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), 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), 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), Université Nice Sophia Antipolis (... - 2019) (UNS), 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), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Observable, Astrophysics, Light curve, 01 natural sciences, Asteroseismology, Spectral line, Photometry (optics), symbols.namesake, Stars, Fourier transform, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Fourier analysis, 0103 physical sciences, symbols, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS
Abstract

The aim of this work was to use a multi-approach technique to derive the most accurate values possible of the physical parameters of the \delta Sct star HD174966. In addition, we searched for a periodic pattern in the frequency spectra with the goal of using it to determine the mean density of the star. First, we extracted the frequency content from the CoRoT light curve. Then, we derived the physical parameters of HD174966 and carried a mode identification out from the spectroscopic and photometric observations. We used this information to look for the models fulfilling all the conditions and discussed the inaccuracies of the method because of the rotation effects. In a final step, we searched for patterns in the frequency set using a Fourier transform, discussed its origin and studied the possibility of using the periodicity to obtain information about the physical parameters of the star. A total of 185 peaks were obtained from the Fourier analysis of the CoRoT light curve, being almost all reliable pulsating frequencies. From the spectroscopic observations, 18 oscillation modes were detected and identified, and the inclination angle ($62.5^{\circ}$$^{+7.5}_{-17.5}$) and the rotational velocity of the star (142 km/s) were estimated. From the multi-colour photometric observations, 3 frequencies were detected, which correspond to the main ones in the CoRoT light curve. We looked for periodicities within the 185 frequencies and found a periodic pattern ~64 \mu Hz. Using the inclination angle, the rotational velocity and an Echelle diagram, showing a double comb outside the asymptotic regime, we concluded that the periodicity corresponds to a large separation structure. The periodic pattern allowed us to discriminate models from a grid, finding that the value of the mean density is achieved with a 6% uncertainty. So, the pattern could be used as a new observable for A-F type stars., Comment: 15 pages, 10 figures, 6 tables

Published
2013

32. Low-amplitude rotational modulation rather than pulsations in the CoRoT B-type supergiant HD 46769

Author

Aerts, C., primary, Simón-Díaz, S., additional, Catala, C., additional, Neiner, C., additional, Briquet, M., additional, Castro, N., additional, Schmid, V. S., additional, Scardia, M., additional, Rainer, M., additional, Poretti, E., additional, Pápics, P. I., additional, Degroote, P., additional, Bloemen, S., additional, Østensen, R. H., additional, Auvergne, M., additional, Baglin, A., additional, Baudin, F., additional, Michel, E., additional, and Samadi, R., additional

Published
2013
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34. Transiting exoplanets from the CoRoT space mission

Author

Almenara, J. M., primary, Bouchy, F., additional, Gaulme, P., additional, Deleuil, M., additional, Havel, M., additional, Gandolfi, D., additional, Deeg, H. J., additional, Wuchterl, G., additional, Guillot, T., additional, Gardes, B., additional, Pasternacki, T., additional, Aigrain, S., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Bonomo, A. S., additional, Bordé, P., additional, Cabrera, J., additional, Carpano, S., additional, Cochran, W. D., additional, Csizmadia, Sz., additional, Damiani, C., additional, Diaz, R. F., additional, Dvorak, R., additional, Endl, M., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Hébrard, G., additional, Gillon, M., additional, Guenther, E., additional, Hatzes, A., additional, Léger, A., additional, Lammer, H., additional, MacQueen, P. J., additional, Mazeh, T., additional, Moutou, C., additional, Ollivier, M., additional, Ofir, A., additional, Pätzold, M., additional, Parviainen, H., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, Samuel, B., additional, Schneider, J., additional, Tal-Or, L., additional, Tingley, B., additional, and Weingrill, J., additional

Published
2013
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35. Overview of semi-sinusoidal stellar variability with the CoRoT satellite

Author

De Medeiros, J. R., primary, Ferreira Lopes, C. E., additional, Leão, I. C., additional, Canto Martins, B. L., additional, Catelan, M., additional, Baglin, A., additional, Vieira, S., additional, Bravo, J. P., additional, Cortés, C., additional, de Freitas, D. B., additional, Janot-Pacheco, E., additional, Maciel, S. C., additional, Melo, C. H. F., additional, Osorio, Y., additional, Porto de Mello, G. F., additional, and Valio, A., additional

Published
2013
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36. Regular frequency patterns in the youngδScuti star HD 261711 observed by the CoRoT and MOST satellites

Author

Zwintz, K., primary, Fossati, L., additional, Guenther, D. B., additional, Ryabchikova, T., additional, Baglin, A., additional, Themessl, N., additional, Barnes, T. G., additional, Matthews, J. M., additional, Auvergne, M., additional, Bohlender, D., additional, Chaintreuil, S., additional, Kuschnig, R., additional, Moffat, A. F. J., additional, Rowe, J. F., additional, Rucinski, S. M., additional, Sasselov, D., additional, and Weiss, W. W., additional

Published
2013
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39. Asymptotic and measured large frequency separations

Author

Mosser, B., primary, Michel, E., additional, Belkacem, K., additional, Goupil, M. J., additional, Baglin, A., additional, Barban, C., additional, Provost, J., additional, Samadi, R., additional, Auvergne, M., additional, and Catala, C., additional

Published
2013
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40. Study of HD 169392A observed by CoRoT and HARPS

Author

Mathur, S., primary, Bruntt, H., additional, Catala, C., additional, Benomar, O., additional, Davies, G. R., additional, García, R. A., additional, Salabert, D., additional, Ballot, J., additional, Mosser, B., additional, Régulo, C., additional, Chaplin, W. J., additional, Elsworth, Y., additional, Handberg, R., additional, Hekker, S., additional, Mantegazza, L., additional, Michel, E., additional, Poretti, E., additional, Rainer, M., additional, Roxburgh, I. W., additional, Samadi, R., additional, Stȩślicki, M., additional, Uytterhoeven, K., additional, Verner, G. A., additional, Auvergne, M., additional, Baglin, A., additional, Barceló Forteza, S., additional, Baudin, F., additional, and Roca Cortés, T., additional

Published
2012
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41. CoRoT 102749568: mode identification in aδScuti star based on regular spacings

Author

József Benkő, Werner W. Weiss, A. Baglin, Davide Gandolfi, Eike W. Guenther, M. Paparó, M. Auvergne, Á. Sódor, Zs. Bognár, Ennio Poretti, J. C. Suárez, M. Hareter, A. Moya, Department of Brain and Behavioural Sciences, University of Pavia, Institut Cavanilles de Biodiversitat i Biologia Evolutiva (ICBiBE), Universitat de València (UV), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), 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 Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut für Astrophysik [Wien], Universität Wien, and Università degli Studi di Pavia = University of Pavia (UNIPV)

Subjects
[PHYS]Physics [physics], Physics, 010308 nuclear & particles physics, Overtone, Mode (statistics), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Light curve, 01 natural sciences, Critical point (mathematics), Photometry (optics), Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Variable star, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Spectroscopy, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), ComputingMilieux_MISCELLANEOUS
Abstract

The high accuracy of space data increased the number of the periodicities determined for pulsating variable stars, but the mode identification is still a critical point in the non-asymptotic regime. We use regularities in frequency spacings for identifying the pulsation modes of the recently discovered delta Sct star ID 102749568. In addition to analysing CoRoT light curves (15252 datapoints spanning 131 days), we obtained and analysed both spectroscopic and extended multi-colour photometric data. We applied standard tools (MUFRAN, Period04, SigSpec, and FAMIAS) for time-series analysis. A satisfactory light-curve fit was obtaining by means of 52 independent modes and 15 combination terms. The frequency spacing revealed distinct peaks around large (25.55-31.43 microHz), intermediate (9.80, 7.66 microHz), and low (2.35 microHz) separations. We directly identified 9 modes, and the l and n values of other three modes were extrapolated. The combined application of spectroscopy, multi-colour photometry, and modelling yielded the precise physical parameters and confirmed the observational mode identification. The large separation constrained the log g and related quantities. The dominant mode is the radial first overtone., Comment: 13 pages, 8 figures, accepted for publication in A&A

Published
2013

42. γ Doradus pulsation in two pre-main sequence stars discovered by CoRoT

Author

T. A. Ryabchikova, M. Gruberbauer, A. Baglin, Luca Fossati, S. Chaintreuil, Thomas G. Barnes, Konstanze Zwintz, Andreas Kaiser, Universität Insbruck, Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Institute of Astronomy of the Russian Academy of Sciences (INASAN), Russian Academy of Sciences [Moscow] (RAS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Department of Astronomy and Physics [Halifax], Saint Mary's University [Halifax], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, 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)

Subjects
[PHYS]Physics [physics], Physics, Frequency analysis, 010308 nuclear & particles physics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, law.invention, Photometry (optics), Radial velocity, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, law, Observatory, 0103 physical sciences, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Spectroscopy, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), ComputingMilieux_MISCELLANEOUS, Main sequence, Open cluster
Abstract

Pulsations in pre-main sequence stars have been discovered several times within the last years. But nearly all of these pulsators are of delta Scuti-type. gamma Doradus-type pulsation in young stars has been predicted by theory, but lack observational evidence. We present the investigation of variability caused by rotation and (gammaDoradus-type) pulsation in two pre-main sequence members of the young open cluster NGC2264 using high-precision time series photometry from the CoRoT satellite and dedicated high-resolution spectroscopy. Time series photometry of NGC2264VAS20 and NGC 2264VAS87 was obtained by the CoRoT satellite during the dedicated short run SRa01 in March 2008. NGC2264VAS87 was re-observed by CoRoT during the short run SRa05 in December 2011 and January 2012. Frequency analysis was conducted using Period04 and SigSpec. The spectral analysis was performed using equivalent widths and spectral synthesis. The frequency analysis yielded 10 and 14 intrinsic frequencies for NGC2264VAS20 and NGC2264VAS 87, respectively, in the range from 0 to 1.5c/d which are attributed to be caused by a combination of rotation and pulsation. The effective temperatures were derived to be 6380$\pm$150K for NGC2264VAS20 and 6220$\pm$150K for NGC2264VAS87. Membership of the two stars to the cluster is confirmed independently using X-ray fluxes, radial velocity measurements and proper motions available in the literature. The derived Li abundances of log n(Li)=3.34 and 3.54 for NGC2264VAS20 and NGC2264VAS87, respectively, are in agreement with the Li abundance for other stars in NGC2264 of similar Teff reported in the literature. We conclude that the two objects are members of NGC2264 and therefore are in their pre-main sequence evolutionary stage. Assuming that part of their variability is caused by pulsation, these two stars might be the first pre-main sequence gamma Doradus candidates., 11 pages, 10 figures, A&A accepted

Published
2013

43. Transiting exoplanets from the CoRoT space mission

Author

Pätzold, M., primary, Endl, M., additional, Csizmadia, Sz., additional, Gandolfi, D., additional, Jorda, L., additional, Grziwa, S., additional, Carone, L., additional, Pasternacki, T., additional, Aigrain, S., additional, Almenara, J. M., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Cabrera, J., additional, Cavarroc, C., additional, Cochran, W. B., additional, Deleuil, M., additional, Deeg, H. J., additional, Díaz, R., additional, Dvorak, R., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Gillon, M., additional, Guillot, T., additional, Hatzes, A., additional, Hébrard, G., additional, Léger, A., additional, Llebaria, A., additional, Lammer, H., additional, MacQueen, P. J., additional, Mazeh, T., additional, Moutou, C., additional, Ofir, A., additional, Ollivier, M., additional, Parviainen, H., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Santerne, A., additional, Schneider, J., additional, Tingley, B., additional, Weingrill, J., additional, and Wuchterl, G., additional

Published
2012
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44. Gravito-inertial and pressure modes detected in the B3 IV CoRoT target HD 43317

Author

Pápics, P. I., primary, Briquet, M., additional, Baglin, A., additional, Poretti, E., additional, Aerts, C., additional, Degroote, P., additional, Tkachenko, A., additional, Morel, T., additional, Zima, W., additional, Niemczura, E., additional, Rainer, M., additional, Hareter, M., additional, Baudin, F., additional, Catala, C., additional, Michel, E., additional, Samadi, R., additional, and Auvergne, M., additional

Published
2012
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45. The CoRoT B-type binary HD 50230: a prototypical hybrid pulsator with g-mode period and p-mode frequency spacings

Author

Degroote, P., primary, Aerts, C., additional, Michel, E., additional, Briquet, M., additional, Pápics, P. I., additional, Amado, P., additional, Mathias, P., additional, Poretti, E., additional, Rainer, M., additional, Lombaert, R., additional, Hillen, M., additional, Morel, T., additional, Auvergne, M., additional, Baglin, A., additional, Baudin, F., additional, Catala, C., additional, and Samadi, R., additional

Published
2012
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46. Pulsation spectrum ofδScuti stars: the binary HD 50870 as seen with CoRoT and HARPS

Author

Mantegazza, L., primary, Poretti, E., additional, Michel, E., additional, Rainer, M., additional, Baudin, F., additional, García Hernández, A., additional, Semaan, T., additional, Alvarez, M., additional, Amado, P. J., additional, Garrido, R., additional, Mathias, P., additional, Moya, A., additional, Suárez, J. C., additional, Auvergne, M., additional, Baglin, A., additional, Catala, C., additional, and Samadi, R., additional

Published
2012
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47. Transiting exoplanets from the CoRoT space mission

Author

Ollivier, M., primary, Gillon, M., additional, Santerne, A., additional, Wuchterl, G., additional, Havel, M., additional, Bruntt, H., additional, Bordé, P., additional, Pasternacki, T., additional, Endl, M., additional, Gandolfi, D., additional, Aigrain, S., additional, Almenara, J. M., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bonomo, A. S., additional, Bouchy, F., additional, Cabrera, J., additional, Carone, L., additional, Carpano, S., additional, Cavarroc, C., additional, Cochran, W. D., additional, Csizmadia, Sz., additional, Deeg, H. J., additional, Deleuil, M., additional, Diaz, R. F., additional, Dvorak, R., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Gazzano, J.-C., additional, Grziwa, S., additional, Guenther, E., additional, Guillot, T., additional, Guterman, P., additional, Hatzes, A., additional, Hébrard, G., additional, Lammer, H., additional, Léger, A., additional, Lovis, C., additional, MacQueen, P. J., additional, Mayor, M., additional, Mazeh, T., additional, Moutou, C., additional, Ofir, A., additional, Pätzold, M., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Samuel, B., additional, Schneider, J., additional, Tadeu dos Santos, M., additional, Tal-Or, L., additional, Tingley, B., additional, and Weingrill, J., additional

Published
2012
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48. Planetary transit candidates in the CoRoT-SRc01 field

Author

Erikson, A., primary, Santerne, A., additional, Renner, S., additional, Barge, P., additional, Aigrain, S., additional, Alapini, A., additional, Almenara, J.-M., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Benz, W., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Bruntt, H., additional, Cabrera, J., additional, Carone, L., additional, Carpano, S., additional, Csizmadia, Sz., additional, Deleuil, M., additional, Deeg, H. J., additional, Díaz, R. F., additional, Dvorak, R., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Gandolfi, D., additional, Gazzano, J.-C., additional, Gillon, M., additional, Guenther, E. W., additional, Guillot, T., additional, Hatzes, A., additional, Hébrard, G., additional, Jorda, L., additional, Lammer, H., additional, Léger, A., additional, Llebaria, A., additional, Mayor, M., additional, Mazeh, T., additional, Moutou, C., additional, Ollivier, M., additional, Ofir, A., additional, Pätzold, M., additional, Pepe, F., additional, Pont, F., additional, Queloz, D., additional, Rabus, M., additional, Rauer, H., additional, Régulo, C., additional, Rouan, D., additional, Samuel, B., additional, Schneider, J., additional, Shporer, A., additional, Tingley, B., additional, Udry, S., additional, and Wuchterl, G., additional

Published
2012
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49. Planetary transit candidates in the CoRoT LRa01 field

Author

Carone, L., primary, Gandolfi, D., additional, Cabrera, J., additional, Hatzes, A. P., additional, Deeg, H. J., additional, Csizmadia, Sz., additional, Pätzold, M., additional, Weingrill, J., additional, Aigrain, S., additional, Alonso, R., additional, Alapini, A., additional, Almenara, J.-M., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Bruntt, H., additional, Carpano, S., additional, Cochran, W. D., additional, Deleuil, M., additional, Díaz, R. F., additional, Dreizler, S., additional, Dvorak, R., additional, Eislöffel, J., additional, Eigmüller, P., additional, Endl, M., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Gazzano, J.-C., additional, Gibson, N., additional, Gillon, M., additional, Gondoin, P., additional, Grziwa, S., additional, Günther, E. W., additional, Guillot, T., additional, Hartmann, M., additional, Havel, M., additional, Hébrard, G., additional, Jorda, L., additional, Kabath, P., additional, Léger, A., additional, Llebaria, A., additional, Lammer, H., additional, Lovis, C., additional, MacQueen, P. J., additional, Mayor, M., additional, Mazeh, T., additional, Moutou, C., additional, Nortmann, L., additional, Ofir, A., additional, Ollivier, M., additional, Parviainen, H., additional, Pepe, F., additional, Pont, F., additional, Queloz, D., additional, Rabus, M., additional, Rauer, H., additional, Régulo, C., additional, Renner, S., additional, de la Reza, R., additional, Rouan, D., additional, Santerne, A., additional, Samuel, B., additional, Schneider, J., additional, Shporer, A., additional, Stecklum, B., additional, Tal-Or, L., additional, Tingley, B., additional, Udry, S., additional, and Wuchterl, G., additional

Published
2012
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50. Transiting exoplanets from the CoRoT space mission

Author

Deleuil, M., primary, Bonomo, A. S., additional, Ferraz-Mello, S., additional, Erikson, A., additional, Bouchy, F., additional, Havel, M., additional, Aigrain, S., additional, Almenara, J.-M., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bordé, P., additional, Bruntt, H., additional, Cabrera, J., additional, Carpano, S., additional, Cavarroc, C., additional, Csizmadia, Sz., additional, Damiani, C., additional, Deeg, H. J., additional, Dvorak, R., additional, Fridlund, M., additional, Hébrard, G., additional, Gandolfi, D., additional, Gillon, M., additional, Guenther, E., additional, Guillot, T., additional, Hatzes, A., additional, Jorda, L., additional, Léger, A., additional, Lammer, H., additional, Mazeh, T., additional, Moutou, C., additional, Ollivier, M., additional, Ofir, A., additional, Parviainen, H., additional, Queloz, D., additional, Rauer, H., additional, Rodríguez, A., additional, Rouan, D., additional, Santerne, A., additional, Schneider, J., additional, Tal-Or, L., additional, Tingley, B., additional, Weingrill, J., additional, and Wuchterl, G., additional

Published
2012
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