Journal article
Inferring chromospheric flare heating from hydrogen-line wings
The Astrophysical journal, Vol.380(2), pp.660-676
10/20/1991
DOI: 10.1086/170621
Abstract
Strong flare heating that penetrates deeply into the solar chromosphere is examined, and a simple model that is supported by a numerical radiative transfer simulation is applied to study how elevated free electron densities produce markedly increased Stark emission in the wings of hydrogen Lyman and Balmer lines. The proportionality that exists between the observed Stark wing intensity and the total energy deposition in the partially ionized layer is calculated for various Lyman and Balmer lines. It is concluded that when the effects of background opacity sources on the wing enhancements are not important, the magnitude of the nonthermal heating that penetrates the chromosphere may be inferred from the observed line wings. It is predicted that Ly-alpha extended wings will exhibit enhancement of Stark shape, even when inherent damping wing opacity exceeds Stark wing opacity over the entire absorption profile.
Details
- Title: Subtitle
- Inferring chromospheric flare heating from hydrogen-line wings
- Creators
- K. G. Gayley - Joint Institute for Laboratory AstrophysicsR. C. Canfield - Honolulu University
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.380(2), pp.660-676
- DOI
- 10.1086/170621
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Language
- English
- Date published
- 10/20/1991
- Description audience
- PUBLIC
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428770702771
Metrics
2 Record Views