Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology

Details Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology

2009-07-16

arxiv.org/abs/0907.2845v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, 9 figures

Scientific paper

In the context of the space-based mission CoRoT, devoted to asteroseismology and search for planet transits, we analyse the accuracy of fundamental stellar parameters (mass, radius, luminosity) that can be obtained from asteroseismological data.} Our work is motivated by the large uncertainties on planetary radius determination of transiting planets which are mainly due to uncertainties on the stellar parameters. Our goal is to analyse uncertainties of fundamental stellar parameters for a given accuracy of oscillation frequency determination. We generate grids of equilibrium models of stars and compute their pulsation spectra based on a linear nonadiabatic stability analysis. Using differents methods of comparison of oscillation mode spectra, we derive uncertainties on fundamental stellar parameters and analyse the effect of varying the number of considered modes.} The limits obtained depend strongly on the adapted method to compare spectra. We find a degeneracy in the stellar parameter solutions, up to a few % in mass (from less than 1% to more than 7% depending on the method used and the number of considered modes), luminosity (from 2% to more than 10%) or radius (from less than 1% to 3%), for a given pulsation spectrum.

Affiliated with

Also associated with

No associations

Rating

Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621938