NAOC Open IR
Neon Abundances of B Stars in the Solar Neighborhood
Alexeeva,Sofya1; Chen,Tianxiang2; Ryabchikova,Tatyana3; Shi,Weibin2; Sadakane,Kozo4; Nishimura,Masayoshi5; Zhao,Gang1
2020-06-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume896Issue:1
AbstractAbstract We constructed a comprehensive model atom for Ne i–Ne ii using the most-up-to-date atomic data available and evaluated the nonlocal thermodynamic equilibrium (NLTE) line formation for Ne i and Ne ii in classical 1D models representing the atmospheres of B-type stars. We find that the large NLTE strengthening of the Ne i lines corresponding to the 2p53p–2p53s transition array occurs due to extremely small photoionization cross sections of the 2p53s levels that lead to strong overpopulation of these levels relative to their LTE populations. The deviations from LTE for most Ne ii lines are small and do not exceed 0.11?dex in absolute value. We analyzed 20 lines of Ne i and 13 lines of Ne ii for 24 B-type stars in the temperature range of 10,400?≤? ?≤?33,400 K. For five stars, the NLTE leads to consistent abundances of Ne i and Ne ii, while the difference in LTE abundance can reach up to 0.50?dex. Using the experimental oscillator strengths recently measured by Piracha et al. leads to smaller line-by-line scatter for most of the investigated stars. The average neon abundance in 24 B-type stars in the solar neighborhood is 8.02?±?0.05. This value may provide indirect constraints on the solar photospheric neon abundance.
KeywordB stars Early-type stars Solar neighborhood Stellar abundances Chemical abundances Solar abundances
DOI10.3847/1538-4357/ab9306
Language英语
WOS IDIOP:0004-637X-896-1-ab9306
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/63540
Collection中国科学院国家天文台
Affiliation1.Key Lab of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang, Beijing 100102, People's Republic of China; alexeeva@nao.cas.cn, gzhao@nao.cas.cn
2.Shandong Provincial Key Laboratory of Optical Astronomy and Solar Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
3.Institute of Astronomy of the RAS, Pyatnitskaya 48, 119017, Moscow, Russia
4.Astronomical Institute, Osaka Kyoiku University, Asahigaoka, Kashiwara shi, Osaka 582 8582, Japan
5.2–6, Nishiyama Maruo, Yawata shi, Kyoto 614 8353, Japan
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Alexeeva,Sofya,Chen,Tianxiang,Ryabchikova,Tatyana,et al. Neon Abundances of B Stars in the Solar Neighborhood[J]. The Astrophysical Journal,2020,896(1).
APA Alexeeva,Sofya.,Chen,Tianxiang.,Ryabchikova,Tatyana.,Shi,Weibin.,Sadakane,Kozo.,...&Zhao,Gang.(2020).Neon Abundances of B Stars in the Solar Neighborhood.The Astrophysical Journal,896(1).
MLA Alexeeva,Sofya,et al."Neon Abundances of B Stars in the Solar Neighborhood".The Astrophysical Journal 896.1(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Alexeeva,Sofya]'s Articles
[Chen,Tianxiang]'s Articles
[Ryabchikova,Tatyana]'s Articles
Baidu academic
Similar articles in Baidu academic
[Alexeeva,Sofya]'s Articles
[Chen,Tianxiang]'s Articles
[Ryabchikova,Tatyana]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Alexeeva,Sofya]'s Articles
[Chen,Tianxiang]'s Articles
[Ryabchikova,Tatyana]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.