Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology

V. Van Grootel, S. Charpinet, G. Fontaine, P. Brassard, E. M. Green

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Asteroseismic modeling of subdwarf B (sdB) stars provides measurements of their fundamental parameters with a very good precision; in particular, the masses and radii determined from asteroseismology are found to typically reach a precision of 1% containing various uncertainties associated with their inner structure and the underlying microphysics (composition and transition zones profiles, nuclear reaction rates, etc.). Therefore, the question of the accuracy of the stellar parameters derived by asteroseismology is legitimate. We present here the seismic modeling of the pulsating sdB star in the eclipsing binary PG 1336-018, for which the mass and the radius are independently and precisely known from the modeling of the reflection/irradiation effect and the eclipses observed in the light curve. This allows us to quantitatively evaluate the reliability of the seismic method and test the impact of uncertainties in our stellar models on the derived parameters. We conclude that the sdB star parameters inferred from asteroseismology are precise, accurate, and robust against model uncertainties.

Original languageEnglish (US)
Title of host publicationPrecision Asteroseismology
EditorsJoyce Guzik, William Chaplin, William Chaplin, Gerald Handler, Andrzej Pigulski
Number of pages4
StatePublished - 2014

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • stars: binaries: eclipsing
  • stars: individual: PG 1336-018 (NY Virginis).
  • stars: oscillations (including pulsations)
  • stars: subdwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology'. Together they form a unique fingerprint.

Cite this