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Spectroscopic evidence for a large spot on the dimming Betelgeuse
Alexeeva, Sofya1; Zhao, Gang1,2; Gao, Dong-Yang3,4; Du, Junju3; Li, Aigen5; Li, Kai3; Hu, Shaoming3
2021-08-05
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume12Issue:1Pages:13
AbstractDuring October 2019 and March 2020, the luminous red supergiant Betelgeuse demonstrated an unusually deep minimum of its brightness. It became fainter by more than one magnitude and this is the most significant dimming observed in the recent decades. While the reason for the dimming is debated, pre-phase of supernova explosion, obscuring dust, or changes in the photosphere of the star were suggested scenarios. Here, we present spectroscopic studies of Betelgeuse using high-resolution and high signal-to-noise ratio near-infrared spectra obtained at Weihai Observatory on four epochs in 2020 covering the phases of during and after dimming. We show that the dimming episode is caused by the dropping of its effective temperature by at least 170 K on 2020 January 31, that can be attributed to the emergence of a large dark spot on the surface of the star. The reason of the dimming of Betelgeuse is debated. Here, the authors show effective temperature decrease that can be explained by a large spot.
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program
DOI10.1038/s41467-021-25018-3
WOS KeywordMODEL ATMOSPHERES ; EFFECTIVE TEMPERATURES ; DISSOCIATION-ENERGY ; RED SUPERGIANTS ; M-GIANTS ; COOL ; PARAMETERS ; TELESCOPE ; SPECTRA ; SURFACE
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11890694] ; National Natural Science Foundation of China[12050410265] ; National Key R&D Program of China[2019YFA0405502] ; LAMOST FELLOWSHIP ; Canadian Space Agency ; European Southern Observatory under ESO program[266.D-5655(A)]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; LAMOST FELLOWSHIP ; LAMOST FELLOWSHIP ; Canadian Space Agency ; Canadian Space Agency ; European Southern Observatory under ESO program ; European Southern Observatory under ESO program
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000684407600008
PublisherNATURE PORTFOLIO
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75855
Collection中国科学院国家天文台
Corresponding AuthorZhao, Gang
Affiliation1.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Opt Astron, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China
3.Shandong Univ, Sch Space Sci, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai, Shandong, Peoples R China
4.Nanjing Univ, Sch Astron & Space Sci, Key Lab, Minist Educ, Nanjing, Peoples R China
5.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
Recommended Citation
GB/T 7714
Alexeeva, Sofya,Zhao, Gang,Gao, Dong-Yang,et al. Spectroscopic evidence for a large spot on the dimming Betelgeuse[J]. NATURE COMMUNICATIONS,2021,12(1):13.
APA Alexeeva, Sofya.,Zhao, Gang.,Gao, Dong-Yang.,Du, Junju.,Li, Aigen.,...&Hu, Shaoming.(2021).Spectroscopic evidence for a large spot on the dimming Betelgeuse.NATURE COMMUNICATIONS,12(1),13.
MLA Alexeeva, Sofya,et al."Spectroscopic evidence for a large spot on the dimming Betelgeuse".NATURE COMMUNICATIONS 12.1(2021):13.
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