HAYDN -- High-precision AsteroseismologY of DeNse stellar fields

Andrea Miglio, Leo Girardi, Frank Grundahl, Benoit Mosser, Nate Bastian, Angela Bragaglia, Karsten Brogaard, Gael Buldgen, William Chantereau, Bill Chaplin, Cristina Chiappini, Marc-Antoine Dupret, Patrick Eggenberger, Mark Gieles, Rob Izzard, Daisuke Kawata, Christoffer Karoff, Nadege Lagarde, Ted Mackereth, Demetrio MagrinGeorges Meynet, Eric Michel, Josefina Montalban, Valerio Nascimbeni, Arlette Noels, Giampaolo Piotto, Roberto Ragazzoni, Igor Soszynski, Eline Tolstoy, Silvia Toonen, Amaury Triaud, Fiorenzo Vincenzo

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In the last decade, the Kepler and CoRoT space-photometry missions have demonstrated the potential of asteroseismology as a novel, versatile and powerful tool to perform exquisite tests of stellar physics, and to enable precise and accurate characterisations of stellar properties, with impact on both exoplanetary and Galactic astrophysics. Based on our improved understanding of the strengths and limitations of such a tool, we argue for a new small/medium space mission dedicated to gathering high-precision, high-cadence, long photometric series in dense stellar fields. Such a mission will lead to breakthroughs in stellar astrophysics, especially in the metal poor regime, will elucidate the evolution and formation of open and globular clusters, and aid our understanding of the assembly history and chemodynamics of the Milky Way’s bulge and a few nearby dwarf galaxies.

Original languageEnglish
Pages (from-to)1-39
JournalExperimental Astronomy
Issue number3
Publication statusPublished - 26 Mar 2021

Bibliographical note

Acknowledgements: AM, JM and FV acknowledge support from the European Research Council Consolidator Grant funding scheme (project ASTEROCHRONOMETRY, G.A. n. 772293, http://www. asterochronometry.eu). AM, BM and LG are grateful to the International Space Science Institute (ISSI)
for support provided to the asteroSTEP ISSI International Team. AM and WJC acknowledge the support of the UK Science and Technology Facilities Council (STFC). GB is sponsored by the Swiss National Science Foundation (project number 200020 − 172505). WC acknowledges funding from the Swiss National
Science Foundation under grant P400P2 183846. We thank G. R. Davies for providing the power spectra used in Fig. 1. N.L. acknowledges financial support from “Programme National de Physique Stellaire” (PNPS) of CNRS/INSU, France. CC acknowledges partial support from DFG Grant CH1188/2-1 and from the ChETEC COST Action (CA16117), supported by COST (European Cooperation in Science and Technology).

White paper submitted in response to Voyage 2050 long-term plan in the ESA Science Programme, now published in Experimental Astronomy, see https://link.springer.com/article/10.1007/s10686-021-09711-1


  • astro-ph.SR
  • astro-ph.GA
  • Stars: low-mass
  • Asteroseismology
  • Galaxy: bulge
  • Globular clusters
  • Galaxies: dwarf

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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