CA II K emission diagnostics. I - The widths and the strengths in a one-dimensional model

Details CA II K emission diagnostics. I - The widths and the strengths in a one-dimensional model CA II K emission diagnostics. I - The widths and the strengths in a one-dimensional model

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127...33m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 1, Oct. 1983, p. 33-36.

Astronomy and Astrophysics

Astrophysics

1

Calcium, Chromosphere, Emission Spectra, K Lines, Spectral Line Width, Stellar Models, Frequency Distribution, Late Stars, Potassium, Spectrum Analysis

Scientific paper

The authors modeled the widths and the strengths of the Ca II K emission from a one-dimensional atmosphere in terms of a limited set of parameters. Partial frequency redistribution (PRD) in the scattering process was correctly accounted for. The emission characteristics depend generally on several model parameters. However the dependence on chromospheric microturbulence appears to fit easily the observed behaviour of the K2 peak separation, W2, and of the full width at half-maximum, W0. The authors remark that emission in the core of the K line can occur as a PRD effect, without any chromospheric temperature rise, and discuss some implications of this event.

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