TASC8/KASC15 — 8th TESS/15th Kepler Asteroseismic Science Consortium Workshop
Published September 3, 2024 | Version v1
Presentation Open

Interferometric observations of solar-like pulsators: A survey to constrain scaling relations

Authors/Creators

  • 1. ROR icon Observatoire de la Côte d'Azur
  • 2. ROR icon Institut de Recherche en Astrophysique et Planétologie
  • 3. ROR icon Georgia State University
  • 4. ROR icon Observatoire de Paris

Contributors

  • 1. ROR icon Centre for Astrophysics of the University of Porto
  • 2. ROR icon Universidade do Porto

Description

The asteroseismic scaling relations allowing to estimate the masses and radii of solar-like pulsators have now been vastly used to investigate a great number of physical problems in the local universe. However, recent results on luminous red giants and binaries show that the scaling relations appear to be inconsistent with dynamical measurements and Gaia data in these specific regimes. It is therefore necessary to obtain precise and accurate independent measurements to evaluate and understand the limits of seismic scaling relations. The program proposed by the ERC ISSP (Interferometric Survey of Stellar Parameters) has the objective of obtaining direct interferometric constraints on nearby stars with an angular diameter larger than 0.2 mas. The use of the SPICA instrument in the visible with the 300-meter baselines of the CHARA interferometer indeed allows us to reach a precision of 1% on the radius. Thus, the realization of a survey of hundreds of asteroseismic targets with interferometric observations becomes possible. That is what the ERC ISSP is proposing and has started to perform in 2023. In this work, we present the first results of this interferometric survey on several solar-like pulsators, finding a coherence between the interferometric and asteroseismic radii. We also examine the consequences these results have on the use and calibration of seismic scaling relations.

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KASC15_mvrard_proceeding_v2.pdf

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Additional details

Funding

European Research Council
Interferometric Survey of Stellar Parameters (ISSP) 101019653