Non-LTE Calculations of the Mg i 12.32 μm Line in a Flaring Atmosphere
Hong,Jie1,2,3; Bai,Xianyong2,4; Li,Ying5; Ding,M. D.1,3; Deng,Yuanyong2,4
Source PublicationThe Astrophysical Journal
AbstractAbstract The infrared Mg i lines near 12 μm are a pair of emission lines that are magnetically sensitive and have been used to measure solar magnetic fields. Here we calculate the response of the Mg i 12.32 μm line during a flare and find that in our modeling this line has a complicated behavior. At the beginning of the flare heating, this line shows an intensity dimming at the line center. The intensity then increases when heating continues, with increasing contributions from the heated layers in the chromosphere. The line formation height and the line width also increase as a result. As for the polarized line profiles, we find that flare heating tends to decrease the Zeeman splitting width and attenuates the Stokes V lobe intensity. The wider features in the Stokes V profiles are more pronounced during flare heating, which should be considered when performing magnetic field inversions.
KeywordSolar chromosphere Solar photosphere Radiative transfer simulations Solar flare spectra Infrared astronomy
WOS IDIOP:0004-637X-898-2-ab9c21
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People's Republic of China;
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, 20 Datun Road, Beijing 100012, People's Republic of China
3.Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China
4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, People's Republic of China
5.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033, People's Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
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GB/T 7714
Hong,Jie,Bai,Xianyong,Li,Ying,et al. Non-LTE Calculations of the Mg i 12.32 μm Line in a Flaring Atmosphere[J]. The Astrophysical Journal,2020,898(2).
APA Hong,Jie,Bai,Xianyong,Li,Ying,Ding,M. D.,&Deng,Yuanyong.(2020).Non-LTE Calculations of the Mg i 12.32 μm Line in a Flaring Atmosphere.The Astrophysical Journal,898(2).
MLA Hong,Jie,et al."Non-LTE Calculations of the Mg i 12.32 μm Line in a Flaring Atmosphere".The Astrophysical Journal 898.2(2020).
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