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  ALMA Detection of Dark Chromospheric Holes in the Quiet Sun

Loukitcheva, M., White, S. M., & Solanki, S. K. (2019). ALMA Detection of Dark Chromospheric Holes in the Quiet Sun. The Astrophysical Journal Letters, 877(2): L26. doi:10.3847/2041-8213/ab2191.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-C4BD-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-C4BE-A
Genre: Journal Article

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 Creators:
Loukitcheva, Maria1, Author              
White, Stephen M., Author
Solanki, Sami K.1, Author              
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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Free keywords: Sun: atmosphere; Sun: chromosphere; Sun: radio radiation
 Abstract: We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of a quiet-Sun region at a wavelength of 3 mm, obtained during the first solar ALMA cycle on 2017 April 27, and compare them with available chromospheric observations in the UV and visible as well as with photospheric magnetograms. ALMA images clearly reveal the presence of distinct particularly dark/cool areas in the millimeter maps with temperatures as low as 60% of the normal quiet Sun at 3 mm, which are not seen in the other data. We speculate that ALMA is sensing cool chromospheric gas, whose presence had earlier been inferred from infrared CO spectra.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3847/2041-8213/ab2191
 Degree: -

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Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 877 (2) Sequence Number: L26 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215