Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....85..119h&link_type=abstract
Astronomy and Astrophysics, vol. 85, no. 1-2, May 1980, p. 119-127.
Astronomy and Astrophysics
Astrophysics
40
B Stars, Iue, Stellar Mass Ejection, Stellar Spectra, Ultraviolet Spectra, X Ray Sources, Astronomical Photometry, Balmer Series, Light (Visible Radiation), Satellite Observation, Shell Stars
Scientific paper
The first analysis of ultraviolet spectroscopic observation obtained with the IUE satellite of the Be stars HD 102567, X Per, and Gamma Cas, which all are associated with X-ray sources, is presented. The ultraviolet data for HD 102567 (4U 1145-61) consist of low-resolution spectra covering the wavelength range 1150-3200 A. The ultraviolet fluxes are consistent with a reddening of the source of E(B-V)=0.45 magnitude. For this source a complementary program of visible photometry and spectroscopy and X-ray photometry was carried out. During the IUE observations the source 4U 1145-61 was not detectable in X-rays while the spectroscopic observations show dramatic intensity variations of the lower Balmer lines. For the bright Be stars Gamma Cas and X Per high-resolution (0.2 A) ultraviolet spectra covering the wavelength range 1150-3200 A have been obtained. The asymmetric profiles of resonance lines which are present in the spectra of both Gamma Cas and X Per indicate mass loss rates of 7 x 10 to the -9th and 10 to the -8th solar masses/yr, respectively.
Burger Marc
de Loore Camiel
Glencross William
Hammerschlag-Hensberge Godelieve
Howarth Ian
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