Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..274d&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, April 1987, p. 274-283.
Astronomy and Astrophysics
Astronomy
3
Eclipsing Binary Stars, Iue, Stellar Spectrophotometry, Ultraviolet Spectra, A Stars, Balmer Series, Stellar Envelopes, Stellar Luminosity, Stellar Spectra
Scientific paper
IUE low-dispersion spectra and optical ITS scans of the semidetached Algol-type binary system RX Gem have been obtained. The spectral type of the primary component was determined to be A0, with good accuracy. Since the primary eclipse is only partial, the spectral type of the cooler component has been determined with less accuracy as K2 (+ or - 2). The system is only slightly reddened: its color excess is E(B-V) = 0.04 + or - 0.01 mag. Two models of the system are considered, depending on the luminosity class of the hotter star. Optically, the system is a Be star, since it displays Balmer line emission, visible most clearly during the primary eclipse. The ultraviolet spectrum observed near mideclipse does not display the expected 'W Serpentis-type' emission lines. Probably the main reason is that the primary eclipse is only partial.
Dobias Jan J.
Plavec Mirek J.
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