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19 April 2024 |
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Article overview
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Record-breaking coronal magnetic field in solar active region 12673 | | Sergey A. Anfinogentov
; Alexey G. Stupishin
; Ivan I. Mysh'yakov
; Gregory D. Fleishman
; | | Date: |
15 Jul 2019 | | Abstract: | At the Sun, the strongest magnetic fields 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 ~2000 G was ever reported. Here, we present imaging
microwave observations of an anomalously strong magnetic field of about 4000 G
at the base of the corona in solar active region NOAA 12673 on 06 September
2017. 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. | | Source: | arXiv, 1907.6398 | | Services: | Forum | Review | PDF | Favorites | |
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