Ca II 854.2 nm spectropolarimetry compared with ALMA and with scattering polarization theory

J. W. Harvey; Alexander Kosovichev; Klaus Strassmeier; Moira Jardine

doi:10.1017/S1743921320000125

Ca II 854.2 nm spectropolarimetry compared with ALMA and with scattering polarization theory

J. W. Harvey, Alexander Kosovichev, Klaus Strassmeier, Moira Jardine

Research output: Contribution to journal › Article › peer-review

Abstract

Ca II 854.2 nm spectropolarimetric observations of the Sun are compared with nearly simultaneous ALMA observations. These two types of chromospheric observations show rough agreement but also several notable differences. High-sensitivity (≃ 0.01%) observations reveal ubiquitous linear polarization structures across the solar disk in the core of the 854.2 nm line that are consistent with previous theoretical studies.

Original language	English (US)
Pages (from-to)	42-45
Number of pages	4
Journal	Proceedings of the International Astronomical Union
DOIs	https://doi.org/10.1017/S1743921320000125
State	Accepted/In press - 2020

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

Keywords

Sun: Chromosphere
Sun: Magnetic fields
Sun: Radio radiation
polarization
radiative transfer
scattering

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10.1017/S1743921320000125

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title = "Ca II 854.2 nm spectropolarimetry compared with ALMA and with scattering polarization theory",

abstract = "Ca II 854.2 nm spectropolarimetric observations of the Sun are compared with nearly simultaneous ALMA observations. These two types of chromospheric observations show rough agreement but also several notable differences. High-sensitivity (≃ 0.01%) observations reveal ubiquitous linear polarization structures across the solar disk in the core of the 854.2 nm line that are consistent with previous theoretical studies.",

keywords = "Sun: Chromosphere, Sun: Magnetic fields, Sun: Radio radiation, polarization, radiative transfer, scattering",

author = "Harvey, {J. W.} and Alexander Kosovichev and Klaus Strassmeier and Moira Jardine",

note = "Publisher Copyright: {\textcopyright} 2020 International Astronomical Union.",

year = "2020",

doi = "10.1017/S1743921320000125",

language = "English (US)",

pages = "42--45",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

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TY - JOUR

T1 - Ca II 854.2 nm spectropolarimetry compared with ALMA and with scattering polarization theory

AU - Harvey, J. W.

AU - Kosovichev, Alexander

AU - Strassmeier, Klaus

AU - Jardine, Moira

PY - 2020

Y1 - 2020

N2 - Ca II 854.2 nm spectropolarimetric observations of the Sun are compared with nearly simultaneous ALMA observations. These two types of chromospheric observations show rough agreement but also several notable differences. High-sensitivity (≃ 0.01%) observations reveal ubiquitous linear polarization structures across the solar disk in the core of the 854.2 nm line that are consistent with previous theoretical studies.

AB - Ca II 854.2 nm spectropolarimetric observations of the Sun are compared with nearly simultaneous ALMA observations. These two types of chromospheric observations show rough agreement but also several notable differences. High-sensitivity (≃ 0.01%) observations reveal ubiquitous linear polarization structures across the solar disk in the core of the 854.2 nm line that are consistent with previous theoretical studies.

KW - Sun: Chromosphere

KW - Sun: Magnetic fields

KW - Sun: Radio radiation

KW - polarization

KW - radiative transfer

KW - scattering

UR - http://www.scopus.com/inward/record.url?scp=85094141825&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85094141825&partnerID=8YFLogxK

U2 - 10.1017/S1743921320000125

DO - 10.1017/S1743921320000125

M3 - Article

AN - SCOPUS:85094141825

SN - 1743-9213

SP - 42

EP - 45

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

Ca II 854.2 nm spectropolarimetry compared with ALMA and with scattering polarization theory

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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