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A First Spectroscopic Measurement of the Magnetic-field Strength for an Active Region of the Solar Corona

Si, Ran LU ; Brage, Tomas LU ; Li, Wenxian LU ; Grumer, Jon LU ; Li, Meichun and Hutton, Roger LU (2020) In Astrophysical Journal Letters 898(2).
Abstract

For all involved in astronomy, the importance of monitoring and determining astrophysical magnetic-field strengths is clear. It is also a well-known fact that the corona magnetic fields play an important part in the origin of solar flares and the variations of space weather. However, after many years of solar corona studies, there is still no direct and continuous way to measure and monitor the solar magnetic-field strength. We present here a scheme that allows such a measurement, based on a careful study of an exotic class of atomic transitions, known as magnetic induced transitions, in Fe9+. In this contribution we present a first application of this methodology and determine a value of the coronal field strength using the... (More)

For all involved in astronomy, the importance of monitoring and determining astrophysical magnetic-field strengths is clear. It is also a well-known fact that the corona magnetic fields play an important part in the origin of solar flares and the variations of space weather. However, after many years of solar corona studies, there is still no direct and continuous way to measure and monitor the solar magnetic-field strength. We present here a scheme that allows such a measurement, based on a careful study of an exotic class of atomic transitions, known as magnetic induced transitions, in Fe9+. In this contribution we present a first application of this methodology and determine a value of the coronal field strength using the spectroscopic data from Hinode.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Astrophysical Journal Letters
volume
898
issue
2
article number
L34
publisher
IOP Publishing
external identifiers
  • scopus:85090225088
ISSN
2041-8205
DOI
10.3847/2041-8213/aba18c
language
English
LU publication?
yes
id
8206c336-9dcc-4476-a4a1-3eabe733db2d
date added to LUP
2021-01-04 13:02:02
date last changed
2021-01-04 13:02:02
@article{8206c336-9dcc-4476-a4a1-3eabe733db2d,
  abstract     = {<p>For all involved in astronomy, the importance of monitoring and determining astrophysical magnetic-field strengths is clear. It is also a well-known fact that the corona magnetic fields play an important part in the origin of solar flares and the variations of space weather. However, after many years of solar corona studies, there is still no direct and continuous way to measure and monitor the solar magnetic-field strength. We present here a scheme that allows such a measurement, based on a careful study of an exotic class of atomic transitions, known as magnetic induced transitions, in Fe9+. In this contribution we present a first application of this methodology and determine a value of the coronal field strength using the spectroscopic data from Hinode.</p>},
  author       = {Si, Ran and Brage, Tomas and Li, Wenxian and Grumer, Jon and Li, Meichun and Hutton, Roger},
  issn         = {2041-8205},
  language     = {eng},
  number       = {2},
  publisher    = {IOP Publishing},
  series       = {Astrophysical Journal Letters},
  title        = {A First Spectroscopic Measurement of the Magnetic-field Strength for an Active Region of the Solar Corona},
  url          = {http://dx.doi.org/10.3847/2041-8213/aba18c},
  doi          = {10.3847/2041-8213/aba18c},
  volume       = {898},
  year         = {2020},
}