Formation of helium lines in solar prominences

Labrosse, N. and Gouttebroze, P. (2009) Formation of helium lines in solar prominences. AIP Conference Proceedings, 1171(1), pp. 361-362. (doi:10.1063/1.3250084)

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Publisher's URL: http://dx.doi.org/10.1063/1.3250084

Abstract

We summarize the results on the formation of the helium spectrum in solar prominences obtained over recent years. The radiative transfer problem under non-LTE conditions is solved to compute the profiles of the lines of He I and He II. The structure of the prominence-to-corona transition region (PCTR) has a major influence on the resulting spectrum of the resonance lines since they are formed mostly in this part of the prominence. However, subordinate lines are also affected by the structure of the PCTR. We pay particular attention to the formation of the He II 304 Å resonance line which is routinely observed from space, but yet not fully understood. Future steps in the modelling will be addressed.

Item Type:Articles
Keywords:Radiative transfer, accretion disks, corona, scattering, accretion and accretion disks
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Labrosse, Dr Nicolas
Authors: Labrosse, N., and Gouttebroze, P.
Subjects:Q Science > QB Astronomy
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:AIP Conference Proceedings
Publisher:American Institute of Physics
ISSN:0094-243X
ISSN (Online):1551-7616
Copyright Holders:Copyright © 2009 American Institute of Physics
First Published:First published in AIP Conference Proceedings 1171(1):361-362
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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