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On the DB gap of white dwarf evolution: effects of hydrogen mass fraction and convective overshooting
Jie Su; Yan Li
2010
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume10Issue:3Pages:266
AbstractWe investigate the spectral evolution of white dwarfs by considering the ef-fects of hydrogen mass in the atmosphere and convective overshooting above the con-vection zone. Our numerical results show that white dwarfs with MH ~ 10~(-16) M_⊙ show the DA spectral type between 46 000 20 000 K, thus these white dwarfs always appear as DA stars. White dwarfs within the temperature range 46 000 < T_(eff) < 31 000 K always show the DA spectral type, which coincides with the DB gap. We notice the importance of the convective overshooting and suggest that the overshooting length should be proportional to the thickness of the convection zone to better fit the observations.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/39229
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jie Su,Yan Li. On the DB gap of white dwarf evolution: effects of hydrogen mass fraction and convective overshooting[J]. Research in Astronomy and Astrophysics,2010,10(3):266.
APA Jie Su,&Yan Li.(2010).On the DB gap of white dwarf evolution: effects of hydrogen mass fraction and convective overshooting.Research in Astronomy and Astrophysics,10(3),266.
MLA Jie Su,et al."On the DB gap of white dwarf evolution: effects of hydrogen mass fraction and convective overshooting".Research in Astronomy and Astrophysics 10.3(2010):266.
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