Time-resolved UV spectroscopy of BE Ursae Majoris

Details Time-resolved UV spectroscopy of BE Ursae Majoris Time-resolved UV spectroscopy of BE Ursae Majoris

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..328h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, April 1985, p. 328-332. NASA-supported research.

Astronomy and Astrophysics

Astronomy

9

Eclipsing Binary Stars, Far Ultraviolet Radiation, Hot Stars, M Stars, Subdwarf Stars, Ultraviolet Spectroscopy, Flux (Rate), Iue, Light Curve, Orbits, Photometry, Roche Limit

Scientific paper

Far-ultraviolet spectra have been obtained of the eclipsing, hot subdwarf binary, BE UMa, with phase coverage in the 2.3-day orbital period concentrated near minimum light. No clearly phase-related spectral changes were found, but the UV continuum appeared to be in a highly variable state, with changes of a factor of two occurring on a time scale of hours. The hot star in this system may be one of the few known PG 1159-035 variables, which show nonradial pulsations. If so, this is the first such star known in a binary system and thus should be important for determining the physical properties of these stars.

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