Journal article
A modified Eddington-Barbier relation in highly coherent resonance-line wings
The Astrophysical journal, Vol.392(1 Ju), pp.353-356
06/10/1992
DOI: 10.1086/171434
Abstract
It is shown that resonance-line wings are just as useful in inferring plane-parallel stellar chromospheric S sub L distributions as complete redistribution (CRD) profiles. Although coherent scattering effects at a given frequency tend to average depth-dependent parameters over a larger volume than in CRD, this effect can be offset by simply looking closer to line center, where the same depth-dependent information exists as in CRD, albeit somewhat more compressed in frequency space. For resonance lines with high excitation energies such as Ly-alpha, steep Planck function gradients can invalidate the modified Eddington-Barbier approach given, but this problem also exists in CRD.
Details
- Title: Subtitle
- A modified Eddington-Barbier relation in highly coherent resonance-line wings
- Creators
- K. G. Gayley - Joint Institute for Laboratory Astrophysics
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.392(1 Ju), pp.353-356
- DOI
- 10.1086/171434
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Language
- English
- Date published
- 06/10/1992
- Description audience
- PUBLIC
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429054402771
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