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Measurements of the Magnetic Field Strengths at the Bases of Stellar Coronae Using the Magnetic-field-induced Transition Theory
Chen, Yajie1; Liu, Xianyu1; Tian, Hui1,2; Bai, Xianyong2,3; Jin, Meng4; Li, Wenxian2; Yang, Yang5,6; Yang, Zihao1; Deng, Yuanyong2,3
2021-09-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume918Issue:1Pages:6
AbstractMeasurements of the magnetic field in the stellar coronae are extremely difficult. Recently, it was proposed that the magnetic-field-induced transition (MIT) of the Fe x 257 angstrom line can be used to measure the coronal magnetic field of the Sun. We performed forward modeling with a series of global stellar magnetohydrodynamics models to investigate the possibility of extending this method to other late-type stars. We first synthesized the emissions of several Fe x lines for each stellar model, then calculated the magnetic field strengths using the intensity ratios of Fe x 257 angstrom to several other Fe x lines based on the MIT theory. Finally, we compared the derived field strengths with those in the models, and concluded that this method can be used to measure at least the magnetic field strengths at the coronal bases of stars with a mean surface magnetic flux density about one order of magnitude higher than that of the Sun. Our investigation suggests the need for an extreme ultraviolet spectrometer to perform routine measurements of the stellar coronal magnetic field.
Funding OrganizationNSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS
DOI10.3847/2041-8213/ac1e9a
WOS KeywordFLARE ; DYNAMICS ; STARS ; SUN ; MICROWAVE ; TOPOLOGY ; GAS
Language英语
Funding ProjectNSFC[11825301] ; NSFC[12103066] ; NSFC[11790304] ; NSFC[11704076] ; NSFC[12073004] ; NSFC[U1732140] ; Strategic Priority Research Program of CAS[XDA17040507] ; Strategic Priority Research Program of CAS[1916321TS00103201]
Funding OrganizationNSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; NSFC ; NSFC ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000690393700001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75318
Collection中国科学院国家天文台
Corresponding AuthorTian, Hui
Affiliation1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
4.SETI Inst, 189 N Bernardo Ave,Suite 200, Mountain View, CA 94043 USA
5.Fudan Univ, Inst Modern Phys, Shanghai EBIT Lab, Shanghai, Peoples R China
6.Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
Recommended Citation
GB/T 7714
Chen, Yajie,Liu, Xianyu,Tian, Hui,et al. Measurements of the Magnetic Field Strengths at the Bases of Stellar Coronae Using the Magnetic-field-induced Transition Theory[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,918(1):6.
APA Chen, Yajie.,Liu, Xianyu.,Tian, Hui.,Bai, Xianyong.,Jin, Meng.,...&Deng, Yuanyong.(2021).Measurements of the Magnetic Field Strengths at the Bases of Stellar Coronae Using the Magnetic-field-induced Transition Theory.ASTROPHYSICAL JOURNAL LETTERS,918(1),6.
MLA Chen, Yajie,et al."Measurements of the Magnetic Field Strengths at the Bases of Stellar Coronae Using the Magnetic-field-induced Transition Theory".ASTROPHYSICAL JOURNAL LETTERS 918.1(2021):6.
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