Publication detail

The Color and Brightness of the F-corona Inferred from the 2019 July 2 Total Solar Eclipse

BOE, B. HABBAL, S. COOPER, D. DRUCKMÜLLER, M.

Original Title

The Color and Brightness of the F-corona Inferred from the 2019 July 2 Total Solar Eclipse

Type

journal article in Web of Science

Language

English

Original Abstract

Total solar eclipses (TSEs) provide a unique opportunity to quantify the properties of the K-corona (electrons), F-corona (dust), and E-corona (ions) continuously from the solar surface out to a few solar radii. We apply a novel inversion method to separate emission from the K- and F-corona continua using unpolarized total brightness (tB) observations from five 0.5 nm bandpasses acquired during the 2019 July 2 TSE between 529.5 and 788.4 nm. The wavelength dependence relative to the photosphere (i.e., color) of the F-corona itself is used to infer the tB of the K- and F-corona for each line of sight. We compare our K-corona emission results with the Mauna Loa Solar Observatory (MLSO) K-Cor polarized brightness (pB) observations from the day of the eclipse, and the forward modeled K-corona intensity from the Predictive Science Inc. (PSI) magnetohydrodynamic (MHD) model prediction. Our results are generally consistent with previous work and match both the MLSO data and PSI-MHD predictions quite well, supporting the validity of our approach and of the PSI-MHD model. However, we find that the tB of the F-corona is higher than expected in the low corona, perhaps indicating that the F-corona is slightly polarized-challenging the common assumption that the F-corona is entirely unpolarized.

Keywords

Solar corona, F-corona, K-corona

Authors

BOE, B.; HABBAL, S.; COOPER, D.; DRUCKMÜLLER, M.

Released

3. 5. 2021

Publisher

IOP PUBLISHING LTD

Location

BRISTOL

ISBN

0004-637X

Periodical

ASTROPHYSICAL JOURNAL

Year of study

912

Number

1

State

United States of America

Pages from

1

Pages to

15

Pages count

15

URL

https://arxiv.org/pdf/2103.02113.pdf

BibTex

@article{BUT171594,
  author="Benjamin {Boe} and Shadia Rifai {Habbal} and Downs {Cooper} and Miloslav {Druckmüller}",
  title="The Color and Brightness of the F-corona Inferred from the 2019 July 2 Total Solar Eclipse",
  journal="ASTROPHYSICAL JOURNAL",
  year="2021",
  volume="912",
  number="1",
  pages="1--15",
  doi="10.3847/1538-4357/abea79",
  issn="0004-637X",
  url="https://arxiv.org/pdf/2103.02113.pdf"
}