Record-breaking Coronal Magnetic Field in Solar Active Region 12673

被引：43
|
作者：
Anfinogentov, Sergey A. [1 ]
Stupishin, Alexey G. [2 ]
Mysh'yakov, Ivan I. [1 ]
Fleishman, Gregory D. [3 ]
机构：
[1] Inst Solar Terr Phys, Lermontov St 126a, Irkutsk 126A, Russia
[2] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia
[3] New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 880卷 / 02期
关键词：
Sun: corona; Sun: magnetic fields; Sun: radio radiation; SUNSPOTS; MISSION;
D O I：
10.3847/2041-8213/ab3042
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The strongest magnetic fields on the Sun are routinely detected at dark sunspots. The magnitude of the field is typically about 3000 G, with only a few exceptions that reported the magnetic field in excess of 5000 G. Given that the magnetic field decreases with height in the solar atmosphere, no coronal magnetic field above similar to 2000 G has ever been reported. Here, we present imaging microwave observations of anomalously strong magnetic field of about 4000 G at the base of the corona in solar active region NOAA 12673 on 2017 September 6. Combining the photospheric vector measurements of the magnetic field and the coronal probing, we created and validated a nonlinear force-free field coronal model, with which we quantify the record-breaking coronal magnetic field at various coronal heights.
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页数：5
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