2014A&A...563A..23L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST08:04:07

2014A&A...563A..23L - Astronomy and Astrophysics, volume 563A, 23-23 (2014/3-1)

Fundamental stellar parameters of three Kepler stars accurately constrained by lithium abundance and rotation.

LIU K., BI S.L., LI T.D., TIAN Z.J. and GE Z.S.

Abstract (from CDS):

The lithium abundances of KIC 11395018 and KIC 10920273 are not compatible with the age of these stars, which is deduced by asteroseismology. To explain this phenomenon, we investigated the possible evolutionary status and performed a seismological analysis of the three stars KIC 11395018, KIC 10273246, and KIC 10920273. Using the Yale Rotating Stellar Evolution Code (YREC), we constructed stellar models that include diffusion and extra-mixing caused by rotation. In addition to the general observed properties, we considered two constraints, the lithium abundance logN(Li) and the rotational period Prot. A set of stellar fundamental parameters is given by our rotating model for each star. We estimate the mass and age to be 1.24±0.01M and 5.55±0.20Gyr for KIC 11395018, 1.19±0.04M and 4.36±0.29Gyr for KIC 10273246, and 1.15±0.03M and 5.68±0.30Gyr for KIC 10920273. Moreover, the lithium abundance of our rotating model of the three stars agrees well with the observation. The consideration of lithium and the rotational period helped us in obtaining very precise estimates of the star.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: rotation - stars: oscillations

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 TYC 3550-300-1 * 19 09 55.5030371756 +49 15 04.350458355   11.69 10.95     G4-5IV-V 23 0
2 KIC 10273246 * 19 26 05.7609898908 +47 21 30.043012585   11.40 10.80 10.77   F9IV-V 12 0
3 KIC 10920273 * 19 27 45.7619622876 +48 19 45.419368785   12.04 11.64 12.02   G1.5IV-V 16 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-08:04:07

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