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  Fast downflows in a chromospheric filament

Sowmya, K., Lagg, A., Solanki, S. K., & Castellanos Durán, J. S. (2019). Fast downflows in a chromospheric filament. In A. Kosovichev (Ed.), Proceedings of the International Astronomical Union: Solar and Stellar Magnetic Fields: Origins and Manifestations (pp. 454-457).

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-5439-B Version Permalink: https://hdl.handle.net/21.11116/0000-0007-5465-9
Genre: Conference Paper

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 Creators:
Sowmya, K.1, Author
Lagg, Andreas1, Author           
Solanki, Sami K.1, Author           
Castellanos Durán, Juan Sebastian1, Author           
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: An active region filament in the upper chromosphere is studied using spectropolarimetric data in He i 10830 Å from the GREGOR telescope. A Milne-Eddingon based inversion of the Unno-Rachkovsky equations is used to retrieve the velocity and the magnetic field vector of the region. The plasma velocity reaches supersonic values closer to the feet of the filament barbs and coexist with a slow velocity component. Such supersonic velocities result from the acceleration of the plasma as it drains from the filament spine through the barbs. The line-of-sight magnetic fields have strengths below 200 G in the filament spine and in the filament barbs where fast downflows are located, their strengths range between 100 - 700 G.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1017/S174392131900992X
 Degree: -

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Title: Symposium S354 (Solar and Stellar Magnetic Fields: Origins and Manifestations)
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Title: Proceedings of the International Astronomical Union: Solar and Stellar Magnetic Fields: Origins and Manifestations
Source Genre: Proceedings
 Creator(s):
Kosovichev, A., Editor
Strassmeier, K., Author
Jardine, M., Author
Affiliations:
-
Publ. Info: -
Pages: - Volume / Issue: 15 Sequence Number: - Start / End Page: 454 - 457 Identifier: -