Global maps of the magnetic field in the solar corona

Zihao Yang; Christian Bethge; Hui Tian; Steve Tomczyk; Richard Morton; Giulio Del Zanna; Scott W. McIntosh; Sarah Gibson; Tanomy Samanta; Jiansen He; Yajie Chen; Linghua Wang

doi:10.1126/science.abb4462

Global maps of the magnetic field in the solar corona

Zihao Yang, Christian Bethge, Hui Tian, Steve Tomczyk, Richard Morton, Giulio Del Zanna, Scott W. McIntosh, Sarah Gibson, Tanomy Samanta, Jiansen He, Yajie Chen, Linghua Wang

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Abstract

Understanding many physical processes in the solar atmosphere requires determination of the magnetic field in each atmospheric layer. However, direct measurements of the magnetic field in the Sun's corona are difficult to obtain. Using observations with the Coronal Multi-channel Polarimeter, we have determined the spatial distribution of the plasma density in the corona and the phase speed of the prevailing transverse magnetohydrodynamic waves within the plasma. We combined these measurements to map the plane-of-sky component of the global coronal magnetic field. The derived field strengths in the corona, from 1.05 to 1.35 solar radii, are mostly 1 to 4 gauss. Our results demonstrate the capability of imaging spectroscopy in coronal magnetic field diagnostics.

Original language	English
Pages (from-to)	694-697
Number of pages	4
Journal	Science
Volume	369
Issue number	6504
DOIs	https://doi.org/10.1126/science.abb4462
Publication status	Published - 7 Aug 2020

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@article{01efa5a04b2149c1a4c88ad2be1ae803,

title = "Global maps of the magnetic field in the solar corona",

abstract = "Understanding many physical processes in the solar atmosphere requires determination of the magnetic field in each atmospheric layer. However, direct measurements of the magnetic field in the Sun's corona are difficult to obtain. Using observations with the Coronal Multi-channel Polarimeter, we have determined the spatial distribution of the plasma density in the corona and the phase speed of the prevailing transverse magnetohydrodynamic waves within the plasma. We combined these measurements to map the plane-of-sky component of the global coronal magnetic field. The derived field strengths in the corona, from 1.05 to 1.35 solar radii, are mostly 1 to 4 gauss. Our results demonstrate the capability of imaging spectroscopy in coronal magnetic field diagnostics.",

author = "Zihao Yang and Christian Bethge and Hui Tian and Steve Tomczyk and Richard Morton and \{Del Zanna\}, Giulio and McIntosh, \{Scott W.\} and Sarah Gibson and Tanomy Samanta and Jiansen He and Yajie Chen and Linghua Wang",

note = "Funding Information: This work was supported by NSFC grants 11825301, 11790304(11790300), 41421003, 41774183, 41861134033, and 41874200; the Strategic Priority Research Program of CAS (grant no. XDA17040507), the Max Planck Partner Group program, STFC (UK) through consolidated grants to the atomic astrophysics group at DAMTP at the University of Cambridge (ST/P000665/1 and ST/T000481/1); and the Department of Science and Technology (SERB/DST) through the Ramanujan Fellowship (project no. SB/S2/RJN-017/ 2018). Publisher Copyright: {\textcopyright} 2020 American Association for the Advancement of Science. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = aug,

day = "7",

doi = "10.1126/science.abb4462",

language = "English",

volume = "369",

pages = "694--697",

journal = "Science",

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publisher = "American Association for the Advancement of Science",

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TY - JOUR

T1 - Global maps of the magnetic field in the solar corona

AU - Yang, Zihao

AU - Bethge, Christian

AU - Tian, Hui

AU - Tomczyk, Steve

AU - Morton, Richard

AU - Del Zanna, Giulio

AU - McIntosh, Scott W.

AU - Gibson, Sarah

AU - Samanta, Tanomy

AU - He, Jiansen

AU - Chen, Yajie

AU - Wang, Linghua

N1 - Funding Information: This work was supported by NSFC grants 11825301, 11790304(11790300), 41421003, 41774183, 41861134033, and 41874200; the Strategic Priority Research Program of CAS (grant no. XDA17040507), the Max Planck Partner Group program, STFC (UK) through consolidated grants to the atomic astrophysics group at DAMTP at the University of Cambridge (ST/P000665/1 and ST/T000481/1); and the Department of Science and Technology (SERB/DST) through the Ramanujan Fellowship (project no. SB/S2/RJN-017/ 2018). Publisher Copyright: © 2020 American Association for the Advancement of Science. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/8/7

Y1 - 2020/8/7

N2 - Understanding many physical processes in the solar atmosphere requires determination of the magnetic field in each atmospheric layer. However, direct measurements of the magnetic field in the Sun's corona are difficult to obtain. Using observations with the Coronal Multi-channel Polarimeter, we have determined the spatial distribution of the plasma density in the corona and the phase speed of the prevailing transverse magnetohydrodynamic waves within the plasma. We combined these measurements to map the plane-of-sky component of the global coronal magnetic field. The derived field strengths in the corona, from 1.05 to 1.35 solar radii, are mostly 1 to 4 gauss. Our results demonstrate the capability of imaging spectroscopy in coronal magnetic field diagnostics.

AB - Understanding many physical processes in the solar atmosphere requires determination of the magnetic field in each atmospheric layer. However, direct measurements of the magnetic field in the Sun's corona are difficult to obtain. Using observations with the Coronal Multi-channel Polarimeter, we have determined the spatial distribution of the plasma density in the corona and the phase speed of the prevailing transverse magnetohydrodynamic waves within the plasma. We combined these measurements to map the plane-of-sky component of the global coronal magnetic field. The derived field strengths in the corona, from 1.05 to 1.35 solar radii, are mostly 1 to 4 gauss. Our results demonstrate the capability of imaging spectroscopy in coronal magnetic field diagnostics.

UR - https://www.scopus.com/pages/publications/85089301272

U2 - 10.1126/science.abb4462

DO - 10.1126/science.abb4462

M3 - Article

SN - 0036-8075

VL - 369

SP - 694

EP - 697

JO - Science

JF - Science

IS - 6504

ER -

Global maps of the magnetic field in the solar corona

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