Brown, G. M. and Labrosse, N. (2018) The influence of the solar coronal radiation on coronal plasma structures, I: determination of the incident coronal radiation. Solar Physics, 293(2), 35. (doi: 10.1007/s11207-018-1255-z)
|
Text
156490.pdf - Published Version Available under License Creative Commons Attribution. 356kB |
Abstract
Coronal structures receive radiation not only from the solar disc, but also from the corona. This height-dependent incident radiation plays a crucial role in the excitation and the ionisation of the illuminated plasma. The aim of this article is to present a method for computing the detailed incident radiation coming from the solar corona, which is perceived at a point located at an arbitrary height. The coronal radiation is calculated by integrating the radiation received at a point in the corona over all of the corona visible from this point. The emission from the corona at all wavelengths of interest is computed using atomic data provided by CHIANTI. We obtain the spectrum illuminating points located at varying heights in the corona at wavelengths between 100 and 912 Å when photons can ionise H or He atoms and ions in their ground states. As expected, individual spectral lines will contribute most at the height within the corona where the local temperature is closest to their formation temperature. As there are many spectral lines produced by many ions, the coronal intensity cannot be assumed to vary in the same way at all wavelengths and so must be calculated for each separate height that is to be considered. This code can be used to compute the spectrum from the corona illuminating a point at any given height above the solar surface. This brings a necessary improvement to models where an accurate determination of the excitation and ionisation states of coronal plasma structures is crucial.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Brown, Mr Gerrard and Labrosse, Dr Nicolas |
| Authors: | Brown, G. M., and Labrosse, N. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Solar Physics |
| Publisher: | Springer |
| ISSN: | 0038-0938 |
| ISSN (Online): | 1573-093X |
| Published Online: | 09 February 2018 |
| Copyright Holders: | Copyright © 2018 The Authors |
| First Published: | First published in Solar Physics 293(2): 35 |
| Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record
Funder and Project Information
Funder and Project Information