Mathematics – Probability
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..402k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 15, 1991, p. 402-406. Research supported by De
Mathematics
Probability
7
Astronomical Spectroscopy, Gas Dynamics, Red Dwarf Stars, Stellar Atmospheres, Stellar Flares, Stellar Spectra, Balmer Series, Light Curve, Stellar Models, Temporal Resolution
Scientific paper
The 3600-4400 A spectra obtained for the March 4, 1985 flare spectra of YZ CMi are analyzed on the basis of a gasdynamic model whose U-band optical radiation is generated by a condensation formed during the gasdynamic process. The source of the optical radiation is a dense, cool plasma with small height; this source is responsible for the radiation from the higher Balmer lines when they are at maximum intensity, as presently demonstrated by the hydrogen plasma kinetics of an 'eight-levels-plus-continuum' model atom. It is demonstrated that the low slope of the Balmer decrement is due to a combination of a large population in the second level of the hydrogen atom, in conjunction with a photon escape probability decrease from the medium, at the higher Balmer line frequencies.
Butler John C.
Doyle Gerry J.
Katsova M. M.
Livshits Moisey A.
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