Emission Lines in the Spectrum of the Red-Dwarf Flare Star EV Lac: Modeling of the Quiescent Chromosphere

Details Emission Lines in the Spectrum of the Red-Dwarf Flare Star EV Lac: Modeling of the Quiescent Chromosphere Emission Lines in the Spectrum of the Red-Dwarf Flare Star EV Lac: Modeling of the Quiescent Chromosphere

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45...67b&link_type=abstract

Astronomy Reports, Volume 45, Issue 1, January 2001, pp.67-74

Astronomy and Astrophysics

Astronomy

4

Scientific paper

We present spectral observations of the red-dwarf flare star EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995, and describe a method for semi-empirical modeling of the chromospheres of red dwarfs based on their emission spectra. We have modeled the quiescent state of the chromosphere of EV Lac for the cases of a homogeneous chromosphere and of active regions covering one-half and one-third the stellar surface. All models that are consistent with the observations indicate a region with a small vertical temperature gradient, a so-called temperature plateau. The calculated structure of the stellar chromosphere is compared with that of the solar chromosphere.

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