Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193..211e&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 211-221. Research supported by the Norges Almenvi
Astronomy and Astrophysics
Astrophysics
13
Binary Stars, Dwarf Stars, Iue, Stellar Flares, Stellar Spectrophotometry, Ultraviolet Spectra, Doppler Effect, Spectral Line Width, Stellar Radiation, Stellar Structure
Scientific paper
Ultraviolet spectra of the dwarf flare star binary AT Mic (dM 4.5e+dM 4.5e) were obtained with the IUE spacecraft on three days in September 1985. A high-resolution short-wavelength spectrum was exposed for 25 hours. Simultaneous optical monitoring in the U-band was performed during part of the IUE observations. At the time of observation AT Mic was flaring at an average rate of 1.3 flares per hour. On the average 9% of the energy in the U-band was due to the detected flare activity. From the observed high resolution spectra, line wavelengths, widths and fluxes were derived, and the effects of the binary structure of AT Mic on the spectral lines were evaluated. The ultraviolet emission line spectrum is similar in character to that of flare regions on the Sun and other stars.
Ambruster Carol
Ayres Thomas R.
Clark Michael
Elgaroy Oystein
Engvold Odbjørn
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