PLATO as it is: A legacy mission for Galactic archaeology

Research output: Contribution to journalArticle

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.

Details

Authors
  • A. Miglio
  • C. Chiappini
  • B. Mosser
  • G. R. Davies
  • K. Freeman
  • L. Girardi
  • P. Jofré
  • D. Kawata
  • B. M. Rendle
  • M Valentini
  • L. Casagrande
  • W. J. Chaplin
  • G. Gilmore
  • K. Hawkins
  • B. Holl
  • T. Appourchaux
  • K. Belkacem
  • D. Bossini
  • K. Brogaard
  • M. -J. Goupil
  • J. Montalbán
  • A. Grotsch-Noels
  • F Anders
  • T. S. Rodrigues
  • G. Piotto
  • D. Pollacco
  • H. Rauer
  • C. Allende Prieto
  • P. P. Avelino
  • C. Babusiaux
  • C. Barban
  • B Barbuy
  • S Basu
  • F. Baudin
  • O. Benomar
  • O. Bienaymé
  • J. Binney
  • J. Bland-Hawthorn
  • A. Bressan
  • C. Cacciari
  • T. L. Campante
  • S. Cassisi
  • J. Christensen-Dalsgaard
  • F. Combes
  • O. Creevey
  • M. Da Cunha Sargedas De Sousa
  • R. S. de Jong
  • P. De Laverny
  • S. Degl'Innocenti
  • S. Deheuvels
  • E Depagne
  • J. de Ridder
  • R.P. De Matteo
  • M. P.Di Mauro
  • M. A. Dupret
  • P. Eggenberger
  • Y. P. Elsworth
  • B. Famaey
  • R. A. García
  • O. Gerhard
  • B. K. Gibson
  • L. Gizon
  • M. Haywood
  • R. Handberg
  • U Heiter
  • S. Hekker
  • D. Huber
  • R. Ibata
  • D. Katz
  • S. D. Kawaler
  • Hans Kjeldsen
  • D. W. Kurtz
  • N. Lagarde
  • Y. Lebreton
  • M. N. Lund
  • S. R. Majewski
  • P. Marigo
  • M. Martig
  • S. Mathur
  • I. Minchev
  • T. Morel
  • S. Ortolani
  • M. H. Pinsonneault
  • B Plez
  • P. G.Prada Moroni
  • D. Pricopi
  • A. Recio-Blanco
  • C. Reylé
  • A. C. Robin
  • I. W. Roxburgh
  • M. Salaris
  • B. X. Santiago
  • R. Schiavon
  • A. Serenelli
  • S. Sharma
  • V. Silva Aguirre
  • C. Soubiran
  • M. Steinmetz
  • D. Stello
  • K. G. Strassmeier
  • P. Ventura
  • R Ventura Santos
  • N. A. Walton
  • C. C. Worley
Organisations
External organisations
  • University of Birmingham
  • Aarhus University
  • Leibniz Institute for Astrophysics Potsdam (AIP)
  • Australian National University
  • INAF - Osservatorio Astronomico di Padova
  • University of Cambridge
  • University College London
  • Columbia University
  • University of Geneva
  • University of Paris-Sud
  • University of Padova
  • University of Liège
  • University of Warwick
  • Institute of Atmospheric Physics
  • Technical University of Berlin
  • Instituto de Astrofísica de Canarias
  • University of La Laguna (ULL)
  • University of São Paulo
  • Yale University
  • New York University Abu Dhabi
  • University of Strasbourg
  • University of Oxford
  • University of Sydney
  • International School For Advanced Studies (sissa/isas)
  • INAF Osservatorio Astronomico di Bologna
  • University of Göttingen
  • Côte d'Azur Observatory
  • University of Pisa
  • Istituto Nazionale di Fisica Nucleare
  • University of Toulouse
  • Catholic University of Leuven
  • CEA Saclay
  • Max Planck Institute for Extraterrestrial Physics
  • Max Planck Institute for Solar System Research
  • Uppsala University
  • University of Hawaii at Manoa
  • Iowa State University
  • University of Central Lancashire
  • University of Burgundy - Franche-Comté
  • Institut de Physique de Rennes
  • University of Virginia
  • Liverpool John Moores University
  • Ohio State University
  • Laboratoire Univers et Particules de Montpellier
  • Queen Mary University
  • Federal University of Rio Grande do Sul
  • University of New South Wales
  • INAF-Osservatorio Astronomico di Roma
  • Osservatorio Astrofisico di Catania
  • Pierre and Marie Curie University
  • Paris Observatory
  • Paris Diderot University
  • University of Porto
  • Paris-Sorbonne University
  • South African Astronomical Observatory
  • University of Hull
  • Space Science Institute
  • Astronomical Institute of the Romanian Academy
  • CSIC Institute of Space Sciences (ICE)
  • University of Bordeaux
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology

Keywords

  • Galaxy: structure – stars: abundances – stars: fundamental parameters – stars: oscillations – surveys
Original languageEnglish
Pages (from-to)644-661
Number of pages18
JournalAstronomische Nachrichten
Volume338
Issue number6
Publication statusPublished - 2017 Jul 1
Publication categoryResearch
Peer-reviewedYes