The long term variability of 4U 1258-61 (GX304-1)

Details The long term variability of 4U 1258-61 (GX304-1) The long term variability of 4U 1258-61 (GX304-1)

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..415c&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

2

B Stars, Neutron Stars, Stellar Spectra, Variable Stars, X Ray Sources, H Alpha Line, Stellar Envelopes, Stellar Flares

Scientific paper

Optical spectroscopy and photometry of 4U 1258-61 obtained over the course of six years are presented. The H profiles show large changes in line strength and shape throughout the observations; the V magnitude also varies by about 0.5 mag. The photometry implies a spectral class of B4 for a main sequence star, suggesting that the variability is related to the evolution of the circumstellar environment. The observed profiles of the H-alpha line are presented.

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