Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....94..345b&link_type=abstract
Astronomy and Astrophysics, vol. 94, no. 2, Feb. 1981, p. 345-349.
Astronomy and Astrophysics
Astrophysics
8
Binary Stars, Iue, Stellar Spectra, Ultraviolet Spectra, Variable Stars, X Ray Sources, Stellar Envelopes, Stellar Mass Ejection, Stellar Temperature
Scientific paper
The O 9.5 (III-V) pe star X Persei, proposed optical counterpart of the X-ray source 4U 0352+30, has been observed on October 14, 1978, with the SWP Camera on board the IUE satellite in the low and high resolution modes. The ultraviolet continuum, in the range 1000-1900 A, can adequately be fitted to the emergent flux from a model atmosphere having 7; 30,000 K, in agreement with the spectral type of the star. The Si iv and C iv resonance lines show the presence of a dense envelope around the star, expanding with a terminal velocity of 650 km s-1. The mass loss rate is estimated of the order of 10-9 Msun/yr. Comparison with previous results obtained by means of IUE suggests that fluctuations both in velocity and in mass loss rate might occur in the envelope of this star.
Bernacca Pier L.
Bianchi Luciana
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