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

Published online by Cambridge University Press:  24 September 2020

J. W. Harvey Open the ORCID record for J. W. Harvey [Opens in a new window]  and
SOLIS Team
J. W. Harvey
Affiliation:
National Science Foundation’s National Solar Observatory, 3665 Discovery Drive, Boulder, CO80303, USA email: jharvey@nso.edu
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Abstract

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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: chromosphereSun: magnetic fieldsSun: radio radiationpolarizationradiative transferscattering
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S354: Solar and Stellar Magnetic Fields: Origins and Manifestations , June 2019 , pp. 42 - 45
Copyright
© International Astronomical Union 2020

References

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Harvey et al. supplementary material

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