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Variability of Magnetic Hot Stars from the TESS Observations

文献类型：期刊论文

作者Shen, Dong-Xiang5; Li, Gang6; Abdusamatjan, Iskandar1,2; Fu, Jian-Ning3; Zhu, Chun-Hua5; Yu, Jin-Long4; Zhang, Yu1; Lue, Guo-Liang1; Zhai, Nan-Nan1; Liu, Jin-Zhong1
刊名ASTROPHYSICAL JOURNAL
出版日期2023-10-01
卷号955期号:2页码:123
ISSN号0004-637X
DOI10.3847/1538-4357/acf197
产权排序3
英文摘要Magnetic hot stars refer to stars that have effective temperatures approximately in the range from 7000-50,000 K, and with large-scale globally organized magnetic fields. These magnetic fields exhibit strengths ranging from tens of Gauss to tens of kilo-Gauss. They are key in understanding the effects caused by magnetic fields in the stellar evolution. However, there are only three magnetic hot stars studied via a combination of spectropolarimetric and asteroseismic modeling. Combined with Transiting Exoplanet Survey Satellite sectors 1-56 data sets, we provided a photometric variability and stochastic low-frequency (SLF) variability study of 118 magnetic hot stars. Nine new rotating variable stars are identified. Using the Bayesian Markov Chain Monte Carlo framework, we fitted the morphologies of SLF variability for magnetic hot stars. Our analysis reveals that the magnetic hot stars in our sample have gamma < 5.5 with the vast majority having 1 <= gamma <= 3. The nu(char) is primarily in the ranges of 0 day(-1) < nu(char) < 6.3 day(-1). The amplitude of SLF variability, log alpha(0), shows a dominant distribution ranging from 0.8-3. No significant correlations are observed between the luminosity and fitting parameters, suggesting no clear dependence of SLF variability on stellar mass for our sample of magnetic hot stars with masses between approximately 1.5 M-circle dot < M < 20 M-circle dot. We found a significant negative correlation between the B-p and nu(char). This suppression effect of magnetic fields on nu(char) may be a result of their inhibition of macroturbulence.
WOS关键词B-TYPE STARS ; INTERNAL GRAVITY-WAVES ; ANGULAR-MOMENTUM TRANSPORT ; SLOWLY PULSATING-B ; A-TYPE STARS ; ROTATING MAGNETOSPHERE MODEL ; CHEMICALLY PECULIAR STARS ; GAMMA DORADUS STARS ; X-RAY-EMISSION ; SIGMA ORI E
资助项目National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang[2021D01C075] ; Natural Science Foundation of Xinjiang[2022D01D85] ; Natural Science Foundation of Xinjiang[2022TSYCLJ0006] ; China Manned Space Project[CMS-CSST-2021-A10] ; NASA Explorer Program ; Association of Universities for Research in Astronomy, Inc., under NASA[NAS 5-26555] ; [U2031204] ; [12163005] ; [12288102]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001122185400001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang ; China Manned Space Project ; NASA Explorer Program ; Association of Universities for Research in Astronomy, Inc., under NASA
源URL[http://ir.xao.ac.cn/handle/45760611-7/5655]  
专题新疆天文台_光学天文与技术应用研究室
通讯作者Shen, Dong-Xiang; Zhu, Chun-Hua; Liu, Jin-Zhong
作者单位1.Chinese Acad Sci, Xinjiang Astron Observ, Natl Astron Observ, Urumqi 830000, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100871, Peoples R China
4.Tarim Univ, Coll Mech & Elect Engn, Alar 843300, Peoples R China
5.Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China
6.Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium
推荐引用方式
GB/T 7714		 Shen, Dong-Xiang,Li, Gang,Abdusamatjan, Iskandar,et al. Variability of Magnetic Hot Stars from the TESS Observations[J]. ASTROPHYSICAL JOURNAL,2023,955(2):123.
APA Shen, Dong-Xiang.,Li, Gang.,Abdusamatjan, Iskandar.,Fu, Jian-Ning.,Zhu, Chun-Hua.,...&Liu, Jin-Zhong.(2023).Variability of Magnetic Hot Stars from the TESS Observations.ASTROPHYSICAL JOURNAL,955(2),123.
MLA Shen, Dong-Xiang,et al."Variability of Magnetic Hot Stars from the TESS Observations".ASTROPHYSICAL JOURNAL 955.2(2023):123.

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来源：新疆天文台

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