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February 5, 2026

Dynamical mass of a solar-like oscillator at the main sequence turnoff from Gaia astrometry and ground-based spectroscopy

P. G. Beck T. Masseron K. Pavlovski D. Godoy-Rivera S. Mathur D. H. Grossmann A. Hamy D. B. Palakkatharappil E. Panetier R. A. García J. Merc Y. Lu I. Amestoy H. J. Deeg

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Key Points

The research aims to validate mass determination techniques for solar-like stars at the main sequence turnoff.
Utilized astrometric binary systems to derive dynamical masses.
Combined astrometry with spectroscopy from the Las Cumbres Observatory network.
Extracted asteroseismic parameters from NASA satellite photometry.
Found a primary mass of approximately 0.83 to 1.03 solar masses.
Achieved agreement within 1.2σ with mass from individual frequency modeling.
Demonstrated the first empirical validation for solar-like oscillators at the main sequence.

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Implication

Asteroseismology validates dynamical mass in a binary post-main sequence star, suggesting new methods for mass determination.

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Cite This Study

Beck et al. (2026) studied this question.

synapsesocial.com/papers/698c1bb8267fb587c655d9c6 https://doi.org/10.1051/0004-6361/202557452/pdf

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