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PLATO as it is: a legacy mission for Galactic archaeology

A. Miglio 1 C. Chiappini B. Mosser 2 G. R. Davies K. Freeman 3 L. Girardi P. Jofre D. Kawata B. M. Rendle M. Valentini 4 L. Casagrande W. J. Chaplin 5, 6 G. Gilmore K. Hawkins B. Holl 7 T. Appourchaux K. Belkacem 2 D. Bossini K. Brogaard 8 M. -J. Goupil J. Montalban A. Noels F. Anders T. Rodrigues 9 G. Piotto D. Pollacco H. Rauer 10 C. Allende Prieto P. P. Avelino C. Babusiaux C. Barban B. Barbuy S. Basu 11 F. Baudin 12 O. Benomar O. Bienayme J. Binney J. Bland-Hawthorn A. Bressan C. Cacciari 13 T. L. Campante 14 S. Cassisi J. Christensen-Dalsgaard 8 F. Combes O. Creevey 15 M. S. Cunha 16 R. S. de Jong P. de Laverny 17 S. Degl'Innocenti S. Deheuvels 18 E. Depagne 19 J. Deridder P. Dimatteo M. P. Di Mauro M. -A. Dupret 1 P. Eggenberger 20 Y. Elsworth B. Famaey 21, 22 S. Feltzing R. A. Garcia 23 O. Gerhard 24 B. K. Gibson Laurent Gizon 25 M. Haywood R. Handberg 5 U. Heiter S. Hekker D. Huber 26, 5 R. Ibata D. Katz 27 S. D. Kawaler H. Kjeldsen 8 D. W. Kurtz 28 N. Lagarde Y. Lebreton 29, 2 M. N. Lund S. R. Majewski P. Marigo M. Martig S. Mathur 30 I. Minchev 4 T. Morel 31 S. Ortolani M. H. Pinsonneault 32 B. Plez 33 P. G. Prada Moroni D. Pricopi A. Recio-Blanco 17 C. Reyle 34 A. Robin 34 I. W. Roxburgh M. Salaris 35 B. X. Santiago R. Schiavon A. Serenelli 36 S. Sharma 37 V. Silva Aguirre 5 C. Soubiran 38 M. Steinmetz 4 D. Stello 5 K. G. Strassmeier 39 P. Ventura 40 R. Ventura N. A. Walton C. C. Worley
12 EMBS - Evolution et Modélisation des Bassins Sédimentaires
iSTeP - Institut des Sciences de la Terre de Paris
38 M2A 2017
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
40 SM - Symbiose Marine
Evolution Paris Seine
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.
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Contributor : Marie-Paule Pomies <>
Submitted on : Monday, June 19, 2017 - 10:24:43 AM
Last modification on : Tuesday, May 26, 2020 - 6:50:58 PM

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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, 338 (6), pp.644-661. ⟨10.1002/asna.201713385⟩. ⟨hal-01541393⟩



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