Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232..114m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 1, June 1990, p. 114-118.
Astronomy and Astrophysics
Astronomy
7
Flare Stars, Iue, Stellar Radiation, Ultraviolet Astronomy, Continuous Spectra, Electron Density (Concentration), Radiant Flux Density, Ultraviolet Spectra
Scientific paper
IUE short wavelength observations of the flare star Gl 644, obtained in June 1981 are presented. A flare was detected in one of the spectra as a strong increase in C IV, He II, and continuum fluxes. The electron density of the flaring plasma, determined using line ratio techniques, is 4 x 10 to the 10th/cu cm, which is an increase by a factor of 2.7 above the quiescent. The radiative losses of the flare are at least 1.3 x 10 to the 32nd erg and 4.0 x 10 to the 33rd erg over the temperature range log Te between 4.3 and 5.4 and log Te between 4.0 and 8.0, respectively. This compares with continuum losses of 8.1 x 10 to the 31st erg over the wavelength region 1250-1950 A.
Doyle Gerry J.
Mathioudakis Michail
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