Multiplets in multi-level non-LTE radiative transfer

Details Multiplets in multi-level non-LTE radiative transfer Multiplets in multi-level non-LTE radiative transfer

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...211..383t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 2, March 1989, p. 383-396.

Astronomy and Astrophysics

Astrophysics

2

Fine Structure, Iron, Nonequilibrium Thermodynamics, Radiative Transfer, Stellar Atmospheres, Optical Thickness, Stellar Models, Stellar Spectra

Scientific paper

A new method for treating multiplets in non-LTE calculations is presented, the basic idea of which is to estimate the radiation field of weaker component lines from that of the strongest component to be treated exactly. This method is incorporated in a non-LTE program based on the equivalent-two-level-atom formulation and applied to a test calculation using a simple model Fe I atom with model stellar atmospheres corresponding to spectral types A and F. It is shown that this improved treatment of multiplet increases the departure coefficient of higher excitation levels connected radiatively to lower levels in upper atmospheric layers by several tens percent due to the increased pumping caused by the inclusion of weaker components, as compared to the conventional treatment.

Affiliated with

Also associated with

No associations

Rating

Multiplets in multi-level non-LTE radiative transfer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multiplets in multi-level non-LTE radiative transfer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiplets in multi-level non-LTE radiative transfer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1800411