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154. Mode lifetime and associated scaling relations

Author

Marques J.P., Goupil M.J., Dupret M.A., Baudin F., Appourchaux T., Belkacem K., Noels A., and Samadi R.

Subjects
Physics, QC1-999
Abstract

Thanks to the CoRoT and Kepler spacecrafts, scaling relations (linking seismic indices and global stellar parameters) are becoming the cornerstone of ensemble asteroseismology. Among them, the relation between the cut-off frequency and the frequency of the maximum in the power spectrum of solar-like pulsators as well as the relation between mode lifetime and the effective temperature remain poorly understood. However, a solid theoretical background is essential to assess the accuracy of those relations and subsequently of the derived stellar parameters. We will thus present recent advances on the understanding of the underlying mechanisms governing those relations and show that the physics of mode lifetime (thus of mode damping) plays a major role.

Published
2013
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155. First Results from Virgo on Soho

Author

Fröhlich, C., primary, Andersen, B. N., additional, Appourchaux, T., additional, Berthomieu, G., additional, Crommelynck, D. A., additional, Domingo, V., additional, Fichot, A., additional, Finsterle, W., additional, Gómez, M. F., additional, Gough, D., additional, Jiménez, A., additional, Leifsen, T., additional, Lombaerts, M., additional, Pap, J. M., additional, Provost, J., additional, Roca Cortés, T., additional, Romero, J., additional, Roth, H.-J., additional, Sekii, T., additional, Telljohann, U., additional, Toutain, T., additional, and Wehrli, C., additional

Published
1997
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156. Searching for g modes

Author

Appourchaux, T., Boumier, P., Leibacher, J., Corbard, T., 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), 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 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)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Context. The recent claims of g-mode detection have restarted the search for these potentially extremely important modes. These claims can be reassessed in view of the different data sets available from the SoHO instruments and ground-based instruments. Aims. We produce a new calibration of the GOLF data with a more consistent p-mode amplitude and a more consistent time shift correction compared to the time series used in the past. Methods. The calibration of 22 yr of GOLF data is done with a simpler approach that uses only the predictive radial velocity of the SoHO spacecraft as a reference. Using p modes, we measure and correct the time shift between ground-and space-based instruments and the GOLF instrument. Results. The p-mode velocity calibration is now consistent to within a few percent with other instruments. The remaining time shifts are within ±5 s for 99.8% of the time series.

Published
2018

158. Prisma: Probing Stars from Core to Corona

Author

Appourchaux, T., primary, Catala, C., additional, Catalano, S., additional, Frandsen, S., additional, Fröhlich, C., additional, Gough, D. O., additional, Hoyng, P., additional, Jones, A., additional, Lemaire, P., additional, Tondello, G., additional, and Weiss, W., additional

Published
1993
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159. The Solar Orbiter SPICE instrument: An extreme UV imaging spectrometer.

Author

SPICE Consortium, Anderson, M., Appourchaux, T., Auchère, F., Aznar Cuadrado, R., Barbay, J., Baudin, F., Beardsley, S., Bocchialini, K., Borgo, B., Bruzzi, D., Buchlin, E., Burton, G., Büchel, V., Caldwell, M., Caminade, S., Carlsson, M., Curdt, W., Davenne, J., and Davila, J.

Subjects
ULTRAVIOLET spectrometers, SPECTRAL imaging, SOLAR corona, ELECTRONIC data processing, SPECTRORADIOMETER
Abstract

Aims. The Spectral Imaging of the Coronal Environment (SPICE) instrument is a high-resolution imaging spectrometer operating at extreme ultraviolet wavelengths. In this paper, we present the concept, design, and pre-launch performance of this facility instrument on the ESA/NASA Solar Orbiter mission. Methods. The goal of this paper is to give prospective users a better understanding of the possible types of observations, the data acquisition, and the sources that contribute to the instrument's signal. Results. The paper discusses the science objectives, with a focus on the SPICE-specific aspects, before presenting the instrument's design, including optical, mechanical, thermal, and electronics aspects. This is followed by a characterisation and calibration of the instrument's performance. The paper concludes with descriptions of the operations concept and data processing. Conclusions. The performance measurements of the various instrument parameters meet the requirements derived from the mission's science objectives. The SPICE instrument is ready to perform measurements that will provide vital contributions to the scientific success of the Solar Orbiter mission. [ABSTRACT FROM AUTHOR]

Published
2020
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160. PLATO as it is: A legacy mission for Galactic archaeology

Author

Miglio, A, Chiappini, C, Mosser, B, Davies, GR, Freeman, K, Girardi, L, Jofré, P, Kawata, D, Rendle, BM, Valentini, M, Casagrande, L, Chaplin, WJ, Gilmore, G, Hawkins, K, Holl, B, Appourchaux, T, Belkacem, K, Bossini, D, Brogaard, K, Goupil, MJ, Montalbán, J, Noels, A, Anders, F, Rodrigues, T, Piotto, G, Pollacco, D, Rauer, H, Prieto, CA, Avelino, PP, Babusiaux, C, Barban, C, Barbuy, B, Basu, S, Baudin, F, Benomar, O, Bienaymé, O, Binney, J, Bland-Hawthorn, J, Bressan, A, Cacciari, C, Campante, TL, Cassisi, S, Christensen-Dalsgaard, J, Combes, F, Creevey, O, Cunha, MS, Jong, RS, Laverny, P, Degl'Innocenti, S, Deheuvels, S, Depagne, Ridder, J, Matteo, PD, Mauro, MPD, Dupret, MA, Eggenberger, P, Elsworth, Y, Famaey, B, Feltzing, S, García, RA, Gerhard, O, Gibson, BK, Gizon, L, Haywood, M, Handberg, R, Heiter, U, Hekker, S, Huber, D, Ibata, R, Katz, D, Kawaler, SD, Kjeldsen, H, Kurtz, DW, Lagarde, N, Lebreton, Y, Lund, MN, Majewski, Marigo, P, Gilmore, Gerard [0000-0003-4632-0213], and Apollo - University of Cambridge Repository

Subjects
galaxy: structure, stars: oscillations – surveys, stars: abundances, stars: fundamental parameters
Abstract

Deciphering the assembly history of the Milky Way is a formidable task, which becomes possible only if one can produce high-resolution chrono-chemo-kinematical maps of the Galaxy. Data from large-scale astrometric and spectroscopic surveys will soon provide us with a well-defined view of the current chemo-kinematical structure of the Milky Way, but it will only enable a blurred view on the temporal sequence that led to the present-day Galaxy. As demonstrated by the (ongoing) exploitation of data from the pioneering photometric missions CoRoT, Kepler, and K2, asteroseismology provides the way forward: solar-like oscillating giants are excellent evolutionary clocks thanks to the availability of seismic constraints on their mass and to the tight age–initial mass relation they adhere to. In this paper we identify five key outstanding questions relating to the formation and evolution of the Milky Way that will need precise and accurate ages for large samples of stars to be addressed, and we identify the requirements in terms of number of targets and the precision on the stellar properties that are needed to tackle such questions. By quantifying the asteroseismic yields expected from PLATO for red giant stars, we demonstrate that these requirements are within the capabilities of the current instrument design, provided that observations are sufficiently long to identify the evolutionary state and allow robust and precise determination of acoustic-mode frequencies. This will allow us to harvest data of sufficient quality to reach a 10% precision in age. This is a fundamental prerequisite to then reach the more ambitious goal of a similar level of accuracy, which will be possible only if we have at hand a careful appraisal of systematic uncertainties on age deriving from our limited understanding of stellar physics, a goal that conveniently falls within the main aims of PLATO's core science. We therefore strongly endorse PLATO's current design and proposed observational strategy, and conclude that PLATO, as it is, will be a legacy mission for Galactic archaeology., International Space Science Institute (ISSI), European Commission's Seventh Framework Programme, DFG, CH1188/2-1. COST (European Cooperation in Science and Technology), ChETEC COST Action, CA16117. The Danish National Research Foundation, DNRF106. UK Science and Technology Facilities Council (STFC), PRIN INAF 2014 – CRA 1.05.01.94.05, European Union FP7 program, ERC, 320360. Australian Research Council, DP150100250; FT160100402. NASA, NNX16AI09G. FCT; UID/FIS/04434/2013; FEDER (COMPETE); IF/00894/2012/; POPH/FSE (EC), CNES, DLR; NYUAD Institute, G1502. “Programme National de Physique Stellaire” (PNPS), “Programme National Cosmologie et Galaxies” (CNRS/INSU, France), CNES Fellowship, Swedish National Space Board (SNSB/Rymdstyrelsen), NASA, NNX16AJ17G. ERC Consolidator (STARKEY), 615604). Belspo (PRODEX PLATO), Australian Research Council Future Fellowship, FT1400147. ESP2015-66134-R (MINECO), VILLUM FONDEN, 10118.

Published
2017

166. The life of stars and their planets

Author

Catala, C, Aerts, C, Aigrain, S, Antonello, E, Appourchaux, T, Auvergne, M, Baglin, A, Barge, P, Barstow, M, Baudin, F, Boumier, P, Cameron, A, Christensen-Dalsgaard, J, Cutispoto, G, Deeg, H, Deleuil, M, Desidera, S, Donati, J, Favata, F, Foing, B, Gameiro, J, García, R, Garrido, R, Horne, K, and Lanza, A

Abstract

We lack a reliable scenario for the formation and evolution of stars and their planetary systems, involving key factors such as magnetic fields and turbulence. We present the case for a mission concept that will clarify these problems and give us a global view of the evolution of combined star and planetary systems. This will be achieved by simultaneously addressing the search for planetary transits in front of a large number of stars, including many nearby stars, the study of their internal structure and evolution via asteroseismology, and that of their magnetic activity, via UV monitoring.

Published
2016

167. PLATO as it is: A legacy mission for Galactic archaeology

Author

Miglio, A., primary, Chiappini, C., additional, Mosser, B., additional, Davies, G. R., additional, Freeman, K., additional, Girardi, L., additional, Jofré, P., additional, Kawata, D., additional, Rendle, B. M., additional, Valentini, M., additional, Casagrande, L., additional, Chaplin, W. J., additional, Gilmore, G., additional, Hawkins, K., additional, Holl, B., additional, Appourchaux, T., additional, Belkacem, K., additional, Bossini, D., additional, Brogaard, K., additional, Goupil, M.‐J., additional, Montalbán, J., additional, Noels, A., additional, Anders, F., additional, Rodrigues, T., additional, Piotto, G., additional, Pollacco, D., additional, Rauer, H., additional, Prieto, C. Allende, additional, Avelino, P. P., additional, Babusiaux, C., additional, Barban, C., additional, Barbuy, B., additional, Basu, S., additional, Baudin, F., additional, Benomar, O., additional, Bienaymé, O., additional, Binney, J., additional, Bland‐Hawthorn, J., additional, Bressan, A., additional, Cacciari, C., additional, Campante, T. L., additional, Cassisi, S., additional, Christensen‐Dalsgaard, J., additional, Combes, F., additional, Creevey, O., additional, Cunha, M. S., additional, Jong, R. S., additional, Laverny, P., additional, Degl'Innocenti, S., additional, Deheuvels, S., additional, Depagne, É., additional, Ridder, J., additional, Matteo, P. Di, additional, Mauro, M. P. Di, additional, Dupret, M.‐A., additional, Eggenberger, P., additional, Elsworth, Y., additional, Famaey, B., additional, Feltzing, S., additional, García, R. A., additional, Gerhard, O., additional, Gibson, B. K., additional, Gizon, L., additional, Haywood, M., additional, Handberg, R., additional, Heiter, U., additional, Hekker, S., additional, Huber, D., additional, Ibata, R., additional, Katz, D., additional, Kawaler, S. D., additional, Kjeldsen, H., additional, Kurtz, D. W., additional, Lagarde, N., additional, Lebreton, Y., additional, Lund, M. N., additional, Majewski, S. R., additional, Marigo, P., additional, Martig, M., additional, Mathur, S., additional, Minchev, I., additional, Morel, T., additional, Ortolani, S., additional, Pinsonneault, M. H., additional, Plez, B., additional, Moroni, P. G. Prada, additional, Pricopi, D., additional, Recio‐Blanco, A., additional, Reylé, C., additional, Robin, A., additional, Roxburgh, I. W., additional, Salaris, M., additional, Santiago, B. X., additional, Schiavon, R., additional, Serenelli, A., additional, Sharma, S., additional, Aguirre, V. Silva, additional, Soubiran, C., additional, Steinmetz, M., additional, Stello, D., additional, Strassmeier, K. G., additional, Ventura, P., additional, Ventura, R., additional, Walton, N. A., additional, and Worley, C. C., additional

Published
2017
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168. Keplerobservations of the asteroseismic binary HD 176465

Author

White, T. R., primary, Benomar, O., additional, Silva Aguirre, V., additional, Ball, W. H., additional, Bedding, T. R., additional, Chaplin, W. J., additional, Christensen-Dalsgaard, J., additional, Garcia, R. A., additional, Gizon, L., additional, Stello, D., additional, Aigrain, S., additional, Antia, H. M., additional, Appourchaux, T., additional, Bazot, M., additional, Campante, T. L., additional, Creevey, O. L., additional, Davies, G. R., additional, Elsworth, Y. P., additional, Gaulme, P., additional, Handberg, R., additional, Hekker, S., additional, Houdek, G., additional, Howe, R., additional, Huber, D., additional, Karoff, C., additional, Marques, J. P., additional, Mathur, S., additional, McQuillan, A., additional, Metcalfe, T. S., additional, Mosser, B., additional, Nielsen, M. B., additional, Régulo, C., additional, Salabert, D., additional, and Stahn, T., additional

Published
2017
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169. A seismic and gravitationally bound double star observed by Kepler

Author

Appourchaux, T., Antia, H. M., Ball, W., Creevey, O., Lebreton, Y., Verma, K., Vorontsov, S., Campante, T. L., Davies, G. R., Gaulme, P., Régulo, C., Horch, E., Howell, S., Everett, M., Ciardi, D., Fossati, L., Miglio, A., Montalbán, J., Chaplin, W. J., García, R. A., and Gizon, L.

Abstract

Context. Solar-like oscillations have been observed by Kepler and CoRoT in many solar-type stars, thereby providing a way to probe stars using asteroseismology. Aims. The derivation of stellar parameters has usually been done with single stars. The aim of the paper is to derive the stellar parameters of a double-star system (HIP 93511), for which an interferometric orbit has been observed along with asteroseismic measurements. Methods. We used a time series of nearly two years of data for the double star to detect the two oscillation-mode envelopes that appear in the power spectrum. Using a new scaling relation based on luminosity, we derived the radius and mass of each star. We derived the age of each star using two proxies: one based upon the large frequency separation and a new one based upon the small frequency separation. Using stellar modelling, the mode frequencies allowed us to derive the radius, the mass, and the age of each component. In addition, speckle interferometry performed since 2006 has enabled us to recover the orbit of the system and the total mass of the system. Results. From the determination of the orbit, the total mass of the system is 2.34_(-0.33)^(+0.45) M_⊙. The total seismic mass using scaling relations is 2.47 ± 0.07 M_⊙. The seismic age derived using the new proxy based upon the small frequency separation is 3.5 ± 0.3 Gyr. Based on stellar modelling, the mean common age of the system is 2.7–3.9 Gyr. The mean total seismic mass of the system is 2.34–2.53 M_⊙ consistent with what we determined independently with the orbit. The stellar models provide the mean radius, mass, and age of the stars as R_A = 1.82−1.87R_⊙, M_A = 1.25−1.39 M_⊙, Age_A = 2.6–3.5 Gyr; R_B = 1.22−1.25 R_⊙, M_B = 1.08−1.14 M_⊙, Age_B = 3.35–4.21 Gyr. The models provide two sets of values for Star A: [1.25–1.27] M_⊙ and [1.34–1.39] M_⊙. We detect a convective core in Star A, while Star B does not have any. For the metallicity of the binary system of Z ≈ 0.02, we set the limit between stars having a convective core in the range [1.14–1.25] M_⊙.

Published
2015

170. A DISTANT MIRROR: SOLAR OSCILLATIONS OBSERVED ON NEPTUNE BY THE KEPLER K 2 MISSION

Author

Gaulme, P., primary, Rowe, J. F., additional, Bedding, T. R., additional, Benomar, O., additional, Corsaro, E., additional, Davies, G. R., additional, Hale, S. J., additional, Howe, R., additional, Garcia, R. A., additional, Huber, D., additional, Jiménez, A., additional, Mathur, S., additional, Mosser, B., additional, Appourchaux, T., additional, Boumier, P., additional, Jackiewicz, J., additional, Leibacher, J., additional, Schmider, F.-X., additional, Hammel, H. B., additional, Lissauer, J. J., additional, Marley, M. S., additional, Simon, A. A., additional, Chaplin, W. J., additional, Elsworth, Y., additional, Guzik, J. A., additional, Murphy, N., additional, and Aguirre, V. Silva, additional

Published
2016
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172. DETECTION OF SOLAR-LIKE OSCILLATIONS, OBSERVATIONAL CONSTRAINTS, AND STELLAR MODELS FORθCYG, THE BRIGHTEST STAR OBSERVED BY THEKEPLERMISSION

Author

Guzik, J. A., primary, Houdek, G., additional, Chaplin, W. J., additional, Smalley, B., additional, Kurtz, D. W., additional, Gilliland, R. L., additional, Mullally, F., additional, Rowe, J. F., additional, Bryson, S. T., additional, Still, M. D., additional, Antoci, V., additional, Appourchaux, T., additional, Basu, S., additional, Bedding, T. R., additional, Benomar, O., additional, Garcia, R. A., additional, Huber, D., additional, Kjeldsen, H., additional, Latham, D. W., additional, Metcalfe, T. S., additional, Pápics, P. I., additional, White, T. R., additional, Aerts, C., additional, Ballot, J., additional, Boyajian, T. S., additional, Briquet, M., additional, Bruntt, H., additional, Buchhave, L. A., additional, Campante, T. L., additional, Catanzaro, G., additional, Christensen-Dalsgaard, J., additional, Davies, G. R., additional, Doğan, G., additional, Dragomir, D., additional, Doyle, A. P., additional, Elsworth, Y., additional, Frasca, A., additional, Gaulme, P., additional, Gruberbauer, M., additional, Handberg, R., additional, Hekker, S., additional, Karoff, C., additional, Lehmann, H., additional, Mathias, P., additional, Mathur, S., additional, Miglio, A., additional, Molenda-Żakowicz, J., additional, Mosser, B., additional, Murphy, S. J., additional, Régulo, C., additional, Ripepi, V., additional, Salabert, D., additional, Sousa, S. G., additional, Stello, D., additional, and Uytterhoeven, K., additional

Published
2016
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173. THE ASTEROSEISMIC POTENTIAL OFTESS: EXOPLANET-HOST STARS

Author

Campante, T. L., primary, Schofield, M., additional, Kuszlewicz, J. S., additional, Bouma, L., additional, Chaplin, W. J., additional, Huber, D., additional, Christensen-Dalsgaard, J., additional, Kjeldsen, H., additional, Bossini, D., additional, North, T. S. H., additional, Appourchaux, T., additional, Latham, D. W., additional, Pepper, J., additional, Ricker, G. R., additional, Stassun, K. G., additional, Vanderspek, R., additional, and Winn, J. N., additional

Published
2016
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176. Filtergraph calibration for the Polarimetric and Heliosismic Imager

Author

Dominguez-Tagle, C, Appourchaux, T., Fourmond, J.J., Ruiz de Galarreta, C, Philippon, A, Le Clec'H, J.C., Bouzit, M., Caraty, Y., Bommier, V., Lecocguen, R., Crussaire, D., Malherbe, J.M., 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), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), 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)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL), 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), Bommier, Véronique, and 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)

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

178. Asteroseismology of Solar-Type Stars withK2: Detection of Oscillations in C1 Data

Author

Chaplin, W. J., primary, Lund, M. N., additional, Handberg, R., additional, Basu, S., additional, Buchhave, L. A., additional, Campante, T. L., additional, Davies, G. R., additional, Huber, D., additional, Latham, D. W., additional, Latham, C. A., additional, Serenelli, A., additional, Antia, H. M., additional, Appourchaux, T., additional, Ball, W. H., additional, Benomar, O., additional, Casagrande, L., additional, Christensen-Dalsgaard, J., additional, Coelho, H. R., additional, Creevey, O. L., additional, Elsworth, Y., additional, García, R. A., additional, Gaulme, P., additional, Hekker, S., additional, Kallinger, T., additional, Karoff, C., additional, Kawaler, S. D., additional, Kjeldsen, H., additional, Lundkvist, M. S., additional, Marcadon, F., additional, Mathur, S., additional, Miglio, A., additional, Mosser, B., additional, Régulo, C., additional, Roxburgh, I. W., additional, Silva Aguirre, V., additional, Stello, D., additional, Verma, K., additional, White, T. R., additional, Bedding, T. R., additional, Barclay, T., additional, Buzasi, D. L., additional, Dehuevels, S., additional, Gizon, L., additional, Houdek, G., additional, Howell, S. B., additional, Salabert, D., additional, and Soderblom, D. R., additional

Published
2015
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180. Accurate fundamental parameters and detailed abundance patterns from spectroscopy of 93 solar-type Kepler targets

Author

Bruntt, H., Basu, S., Smalley, B., Chaplin, W. J., Verner, G. A., Bedding, T. R., Catala, C., Gazzano, J. -C., Molenda-Zakowicz, J., Thygesen, A. O., Uytterhoeven, K., Hekker, S., Huber, D., Karoff, C., Mathur, S., Mosser, B., Appourchaux, T., Campante, T. L., Elsworth, Y., Garcia, R. A., Handberg, R., Metcalfe, T. S., Quirion, P. -O., Regulo, C., Roxburgh, I. W., Stello, D., Christensen-Dalsgaard, J., Kawaler, S. D., Kjeldsen, H., Morris, R. L., Quintana, E. V., Sanderfer, D. T., 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 Low Energy Astrophysics (API, FNWI)

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract

International audience; We present a detailed spectroscopic study of 93 solar-type stars that are targets of the NASA/Kepler mission and provide detailed chemical composition of each target. We find that the overall metallicity is well represented by Fe lines. Relative abundances of light elements (CNO) and a elements are generally higher for low-metallicity stars. Our spectroscopic analysis benefits from the accurately measured surface gravity from the asteroseismic analysis of the Kepler light curves. The accuracy on the log g parameter is better than 0.03 dex and is held fixed in the analysis. We compare our Teff determination with a recent colour calibration of VT-KS [TYCHO V magnitude minus Two Micron All Sky Survey (2MASS) KS magnitude] and find very good agreement and a scatter of only 80 K, showing that for other nearby Kepler targets, this index can be used. The asteroseismic log g values agree very well with the classical determination using Fe iFe ii balance, although we find a small systematic offset of 0.08 dex (asteroseismic log g values are lower). The abundance patterns of metals, a elements and the light elements (CNO) show that a simple scaling by [Fe/H] is adequate to represent the metallicity of the stars, except for the stars with metallicity below -0.3, where a-enhancement becomes important. However, this is only important for a very small fraction of the Kepler sample. We therefore recommend that a simple scaling with [Fe/H] be employed in the asteroseismic analyses of large ensembles of solar-type stars.

Published
2012

181. Damping rates of solar-like oscillations across the HR diagram

Author

Belkacem, K., Dupret, M., Baudin, F., Appourchaux, T., Marques, J., Samadi, R., 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), 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), Space Sciences, Technologies and Astrophysics Research Institute (STAR), Université de Liège, 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), Laboratoire d'automatique et de génie des procédés (LAGEP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

182. Global asteroseismic properties of solar-like oscillations observed by Kepler : A comparison of complementary analysis methods

Author

Verner, G.A., Roxburgh, I.W., Elsworth, Y., Chaplin, W.J., Hekker, S., Broomhall, A.-M., Campante, T.L., Karoff, C., Handberg, R., Corsaro, E., Bonanno, A., Gaulme, P., Appourchaux, T., Stello, D., Huber, D., Bedding, T.R., White, T.R., Mathur, S., Mosser, B., Ballot, J., García, R.A., New, R., Régulo, C., Salabert, D., Caldwell, D.A., Christiansen, J.L., Fanelli, M.N., Low Energy Astrophysics (API, FNWI), Astronomy Unit, Queen Mary, School of Physics and Astronomy, University of Birmingham, Centro de Astrofisica da Universidade do Porto (CAUP), INAF-Osservatorio Astrofisico di Catania (INAF-OACt), 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), Sydney Institute for Astronomy (SIfA), Danish AsteroSeismology Centre (DASC), High Altitude Observatory, National Center for Atmospheric Research, 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 de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Faculty of Arts, Computing, Engineering and Sciences, Astronomical Institute Anton Pannekoek, University of Amsterdam, Instituto de Astrofísica de Canarias (IAC), SETI Institute, NASA Ames Research Center, Moffett Field, and Bay Area Environmental Research Institute/NASA Ames Research Center, Moffett Field

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We present the asteroseismic analysis of 1948 F-, G- and K-type main-sequence and subgiant stars observed by the NASA {\em Kepler Mission}. We detect and characterise solar-like oscillations in 642 of these stars. This represents the largest cohort of main-sequence and subgiant solar-like oscillators observed to date. The photometric observations are analysed using the methods developed by nine independent research teams. The results are combined to validate the determined global asteroseismic parameters and calculate the relative precision by which the parameters can be obtained. We correlate the relative number of detected solar-like oscillators with stellar parameters from the {\em Kepler Input Catalog} and find a deficiency for stars with effective temperatures in the range $5300 \lesssim T_\mathrm{eff} \lesssim 5700$\,K and a drop-off in detected oscillations in stars approaching the red edge of the classical instability strip. We compare the power-law relationships between the frequency of peak power, $\nu_\mathrm{max}$, the mean large frequency separation, $\Delta\nu$, and the maximum mode amplitude, $A_\mathrm{max}$, and show that there are significant method-dependent differences in the results obtained. This illustrates the need for multiple complementary analysis methods to be used to assess the robustness and reproducibility of results derived from global asteroseismic parameters., Comment: 14 pages, 9 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society

Published
2011
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183. A seismic and gravitationally bound double star observed byKepler

Author

Appourchaux, T., primary, Antia, H. M., additional, Ball, W., additional, Creevey, O., additional, Lebreton, Y., additional, Verma, K., additional, Vorontsov, S., additional, Campante, T. L., additional, Davies, G. R., additional, Gaulme, P., additional, Régulo, C., additional, Horch, E., additional, Howell, S., additional, Everett, M., additional, Ciardi, D., additional, Fossati, L., additional, Miglio, A., additional, Montalbán, J., additional, Chaplin, W. J., additional, García, R. A., additional, and Gizon, L., additional

Published
2015
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185. Asteroseismic inference on rotation, gyrochronology and planetary system dynamics of 16 Cygni

Author

Davies, G. R., primary, Chaplin, W. J., additional, Farr, W. M., additional, García, R. A., additional, Lund, M. N., additional, Mathis, S., additional, Metcalfe, T. S., additional, Appourchaux, T., additional, Basu, S., additional, Benomar, O., additional, Campante, T. L., additional, Ceillier, T., additional, Elsworth, Y., additional, Handberg, R., additional, Salabert, D., additional, and Stello, D., additional

Published
2014
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186. Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first super-Earth with measured radius

Author

Leger, A., Rouan, D., Jodi Schneider, Barge, P., Fridlund, M., Samuel, B., Ollivier, M., Guenther, E., Deleuil, M., Deeg Hj, Auvergne, M., Alonso, R., Aigrain, S., Alapini, A., Almenara Jm, Baglin, A., Barbieri, M., Bruntt, H., Pascal Bordé, Bouchy, F., Cabrera, J., Catala, C., Carone, L., Carpano, S., Csizmadia, S., Dvorak, R., Erikson, A., Ferraz-Mello, S., Foing, B., Grasset, O., Fressin, F., Gandolfi, D., Gillon, M., Gondoin, P., Guillot, T., Hatzes, A., Hebrard, G., Jorda, L., Lammer, H., Llebaria, A., Loeillet, B., Mayor, M., Mazeh, T., Moutou, C., Patzold, M., Pont, F., Queloz, D., Rauer, H., Renner, S., Samadi, R., Shporer, A., Sotin, C., Tingley, B., Wuchterl, G., Adda, M., Agogu, P., Appourchaux, T., Ballans, H., Baron, P., Beaufort, T., Bellenger, R., Berlin, R., Bernardi, P., Blouin, D., Baudin, F., Bodin, P., Boisnard, L., Boit, L., Bonneau, F., Borzeix, S., Briet, R., Buey Jt, Butler, B., Cailleau, D., Cautain, R., Chabaud Py, Chaintreuil, S., Chiavassa, F., Costes V, Parrho Vc, Fialho Fd, Decaudin, M., Defise Jm, Djalal, S., Epstein, G., Exil Ge, Faure, C., Fenouillet, T., Gaboriaud, A., Gallic, A., Gamet, P., Gavalda, P., Grolleau, E., Gruneisen, R., Gueguen, L., Guis, V., V. Guivarc'H, Guterman, P., Hallouard, D., Hasiba, J., Heuripeau, F., Huntzinger, G., Hustaix, H., Imad, C., Imbert, C., Johlander, B., Jouret, M., Journoud, P., Karioty, F., Kerjean, L., Lafaille, V., Lafond, L., Lam-Trong, T., Landiech, P., Lapeyrere, V., Larque, T., Laudet, P., Lautier, N., Lecann, H., Lefevre, L., Leruyet, B., Levacher, P., Magnan, A., Mazy, E., Mertens, F., Mesnager Jm, Meunier Jc, Michel Jp, Monjoin, W., Naudet, D., Nguyen-Kim, K., Orcesi Jl, Ottacher, H., Perez, R., Peter, G., Plasson, P., Plesseria Jy, Pontet, B., Pradines, A., Céline Quentin, Reynaud Jl, Rolland, G., Rollenhagen, F., Romagnan, R., Russ, N., Schmidt, R., Schwartz, N., Sebbag, I., Sedes, G., Smit, H., Steller Mb, Sunter, W., Surace, C., Tello, M., Tiphene, D., Toulouse, P., Ulmer, B., Vandermarcq, O., Vergnault, E., Vuillemin, A., 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), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA)

Subjects
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

188. AsteroFLAG - from the Sun to the Stars

Author

Chaplin, W.J., Appourchaux, T., Arentoft, Torben, Ballot, J., Baudin, F., Bazot, Michael, Bedding, T.R., Christensen-Dalsgaard, Jørgen, Creevey, O.L., Duez, V., Elsworth, Y., Fletcher, S.T., García, R.A., Gough, D.O., Jiménez, A., Jiménez-Reyes, S.J., Houdek, G., Kjeldsen, Hans, Lazrek, M., Leibacher, J.W., Monteiro, M.J.P.F.G., Neiner, C., New, R., Régulo, C., Salabert, D., Samadi, R., Sekii, T., Sousa, S.G., Toutain, T., and Turck-Chièze, S.

Published
2008

189. Kepler observations of the asteroseismic binary HD 176465.

Author

White, T. R., Benomar, O., Aguirre, V. Silva, Ball, W. H., Bedding, T. R., Chaplin, W. J., Christensen-Dalsgaard, J., Garcia, R. A., Gizon, L., Stello, D., Aigrain, S., Antia, H. M., Appourchaux, T., Bazot, M., Campante, T. L., Creevey, O. L., Davies, G. R., Elsworth, Y. P., Gaulme, P., and Handberg, R.

Subjects
BINARY stars, STELLAR evolution, STELLAR oscillations, STAR formation
Abstract

Binary star systems are important for understanding stellar structure and evolution, and are especially useful when oscillations can be detected and analysed with asteroseismology. However, only four systems are known in which solar-like oscillations are detected in both components. Here, we analyse the fifth such system, HD 176465, which was observed by Kepler. We carefully analysed the system's power spectrum to measure individual mode frequencies, adapting our methods where necessary to accommodate the fact that both stars oscillate in a similar frequency range. We also modelled the two stars independently by fitting stellar models to the frequencies and complementary parameters. We are able to cleanly separate the oscillation modes in both systems. The stellar models produce compatible ages and initial compositions for the stars, as is expected from their common and contemporaneous origin. Combining the individual ages, the system is about 3:0 ± 0:5 Gyr old. The two components of HD 176465 are young physicallysimilar oscillating solar analogues, the first such system to be found, and provide important constraints for stellar evolution and asteroseismology. [ABSTRACT FROM AUTHOR]

Published
2017
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190. Working group report on Asteroseismology and stellar activity from Dome C

Author

Bouchy, F., Mosser, B., Catala, C., Appourchaux, T., Bouvier, J., Chadid, M., Donati, J. F., Fossat, E., François-Xavier Schmider, Thevenin, F., Vauclair, G., 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), Casoli, T. Contini, J.M. Hameury and L. Pagani., 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), Beaussier, Catherine, Casoli, T. Contini, J.M. Hameury and L. Pagani., Laboratoire Hippolyte Fizeau (FIZEAU), 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), and Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract

This paper presents the conclusions of the working group for stellar physics observations at the Dome-C station in Antarctica. It summarizes the advantages of Dome-C for asteroseismology and stellar activity, identifies strategies and possible instrumental projects to be conducted there, and concludes with recommendations for the development of stellar observations. The conclusions are based on the fact that continuous observations over several weeks or months without breaks due to the diurnal cycle are fundamental for programs of stellar physics and especially for asteroseismology and stellar activity. Therefore, Dome-C appears to be a unique ground-based site offering ideal conditions for continuous observations.

Published
2005

191. Flag Hare-And Exercise: on the Extraction of Sectoral Mode Splittings from Full-Disc Sun-As Data

Author

Chaplin, W. J., Appourchaux, T., Baudin, F., Boumier, P., Elsworth, Y., Fletcher, S. T., Fossat, E., Rafael A. García, Isaak, G. R., Jiménez, A., Jiménez-Reyes, S. J., Lazrek, M., Lochard, J., New, R., Pallé, P., Régulo, C., Salabert, D., Toutain, T., Laboratoire Hippolyte Fizeau (FIZEAU), 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 Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), 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), Ingénieurs, Techniciens et Administratifs, 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)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Proceedings of the SOHO 14 / GONG 2004 Workshop (ESA SP-559). "Helio- and Asteroseismology: Towards a Golden Future, ed. D. Danesy., n/a, p. 356 (2004); International audience

Published
2004

195. 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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196. Seismic constraints on the radial dependence of the internal rotation profiles of sixKeplersubgiants and young red giants

Author

Deheuvels, S., primary, Doğan, G., additional, Goupil, M. J., additional, Appourchaux, T., additional, Benomar, O., additional, Bruntt, H., additional, Campante, T. L., additional, Casagrande, L., additional, Ceillier, T., additional, Davies, G. R., additional, De Cat, P., additional, Fu, J. N., additional, García, R. A., additional, Lobel, A., additional, Mosser, B., additional, Reese, D. R., additional, Regulo, C., additional, Schou, J., additional, Stahn, T., additional, Thygesen, A. O., additional, Yang, X. H., additional, Chaplin, W. J., additional, Christensen-Dalsgaard, J., additional, Eggenberger, P., additional, Gizon, L., additional, Mathis, S., additional, Molenda-Żakowicz, J., additional, and Pinsonneault, M., additional

Published
2014
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