Modeling Eri and Asteroseismic Tests of Element Diffusion
Ning Gai1; ShaoLan Bi2; YanKe Tang1
Source PublicationChinese Astronomy and Astrophysics
AbstractTaking into account the helium and metal diffusion,we explore the possible evolutionary status with a seismic analysis,of the MOST (Microvariability and Oscillations of STars) target:the star e Eft.We adopt different input parameters to construct models to fit the available observational constraints in,e.g.,Teff,L,R and Fe/H.From the computation we obtain the average large spacings of ∈ Eri to be about 194±1 μHz.The age of the diffused models was found to be about 1 Gyr,which is younger than the age determined previously by models without diffusion.We found that the effect of pure helium diffusion on the internal structure of the young low-mass star is slight,but that of metal diffusion is obvious.The metal diffusion leads the models to have much higher temperature in the radiative interior,and,correspondingly a higher sound speed there,hence a larger frequency and spacings.
Keywordstars evolution-stars interiors-stars individual ∈ Eridani
Document Type期刊论文
2.Department of Astronomy,Beijing Normal University
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ning Gai,ShaoLan Bi,YanKe Tang. Modeling Eri and Asteroseismic Tests of Element Diffusion[J]. Chinese Astronomy and Astrophysics,2008,8(5):591.
APA Ning Gai,ShaoLan Bi,&YanKe Tang.(2008).Modeling Eri and Asteroseismic Tests of Element Diffusion.Chinese Astronomy and Astrophysics,8(5),591.
MLA Ning Gai,et al."Modeling Eri and Asteroseismic Tests of Element Diffusion".Chinese Astronomy and Astrophysics 8.5(2008):591.
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