Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..396p&link_type=abstract
In its Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 396-399 (SEE N85-20961 11-89)
Astronomy and Astrophysics
Astronomy
4
B Stars, F Stars, Far Ultraviolet Radiation, Ionizing Radiation, Iue, Ultraviolet Spectroscopy, Alpha Particles, Emission Spectra, H Alpha Line, Periodic Variations
Scientific paper
The IUE spectra of five stars with F or F + B optical spectra and strong Be star-like H alpha emission were obtained on several dates. No two exposures of the strange optical variable HD 37453 are quite alike, Mg II emission is strong, and the short wave prime (SWP) region has some resemblance to known interacting binaries such as SX Cas. The HD 43246 shows significant Si IV absorption against an otherwise normal late B-spectrum. The HD 166612 shows early B main-sequence spectral features except for evidence of a strong stellar wind. The HD 207739, discovered in 1982 to show UV characteristics of a strongly interacting system, showed general brightening in the September observations, opposite to the visual flux which decreased slightly. The far-UV spectrum of HD 207739 was seen to evolve but to remain in between the two extremes seen in 1982, which differed greatly both in character and in absolute flux.
Bopp Bernard William
Kondo Yoshihiko
Parsons Sidney B.
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