PLATO as it is: a legacy mission for Galactic archaeology

A. Miglio 1 C. Chiappini B. Mosser G. R. Davies 2, 3 K. Freeman 4 L. Girardi P. Jofre D. Kawata B. M. Rendle M. Valentini 5 L. Casagrande W. J. Chaplin 6 G. Gilmore K. Hawkins B. Holl 7 T. Appourchaux K. Belkacem 8 D. Bossini K. Brogaard 9 M.-J. Goupil J. Montalban A. Noels F. Anders T. Rodrigues 10 G. Piotto D. Pollacco H. Rauer 11 C. Allende Prieto P. P. Avelino C. Babusiaux C. Barban B. Barbuy S. Basu 12 F. Baudin 13 O. Benomar O. Bienayme J. Binney J. Bland-Hawthorn A. Bressan C. Cacciari 14 T. L. Campante 15 S. Cassisi J. Christensen-Dalsgaard 9 F. Combes 16 O. Creevey 17 M. S. Cunha 18 R. S. De Jong P. De Laverny 19 S. Degl'Innocenti S. Deheuvels 20 E. Depagne 21 J. Deridder 22 P. Dimatteo M. P. Di Mauro 23 M.-A. Dupret 1 P. Eggenberger 24 Y. Elsworth B. Famaey S. Feltzing R. A. Garcia 25 O. Gerhard 26 B. K. Gibson L. Gizon 27 M. Haywood R. Handberg 28 U. Heiter S. Hekker D. Huber 29 R. Ibata D. Katz 30 S. D. Kawaler H. Kjeldsen 9 D. W. Kurtz 31 N. Lagarde 32 Y. Lebreton 33, 34 M. N. Lund 35 S. R. Majewski P. Marigo M. Martig S. Mathur I. Minchev 5 T. Morel 36 S. Ortolani M. H. Pinsonneault 37 B. Plez 38 P. G. Prada Moroni D. Pricopi A. Recio-Blanco 19 C. Reyle 39 A. Robin 39 I. W. Roxburgh M. Salaris 40 B. X. Santiago 41 R. Schiavon A. Serenelli S. Sharma 42 V. Silva Aguirre 43 C. Soubiran 44 M. Steinmetz 45 D. Stello 46 K. G. Strassmeier 47 P. Ventura 48 R. Ventura N. A. Walton C. C. Worley
13 EMBS - Evolution et Modélisation des Bassins Sédimentaires
iSTeP - Institut des Sciences de la Terre de Paris
44 M2A 2017
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
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 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 pre-requisite to then reach the more ambitious goal of a similar level of accuracy, which will only be possible if we have to hand a careful appraisal of systematic uncertainties on age deriving from our limited understanding of stellar physics, a goal which conveniently falls within the main aims of PLATO's core science.
Type de document :
Article dans une revue
Astronomical Notes / Astronomische Nachrichten, Wiley-VCH Verlag, 2017, pp.submitted to Astronomical Notes 2017
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https://hal.archives-ouvertes.fr/hal-01541393
Contributeur : Marie-Paule Pomies <>
Soumis le : lundi 19 juin 2017 - 10:24:43
Dernière modification le : mercredi 21 juin 2017 - 01:14:36

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A. Miglio, C. Chiappini, B. Mosser, G. R. Davies, K. Freeman, et al.. PLATO as it is: a legacy mission for Galactic archaeology. Astronomical Notes / Astronomische Nachrichten, Wiley-VCH Verlag, 2017, pp.submitted to Astronomical Notes 2017. <hal-01541393>

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