Some comments on the transient X-ray sources

Details Some comments on the transient X-ray sources Some comments on the transient X-ray sources

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976comap...6..145p&link_type=abstract

Comments on Modern Physics, Part C - Comments on Astrophysics, vol. 6, Oct. 1976, p. 145-156.

Astronomy and Astrophysics

Astronomy

14

Galactic Radiation, X Ray Sources, X Ray Stars, Ariel Satellites, Binary Stars, Black Holes (Astronomy), Galactic Structure, Light Curve, Spaceborne Astronomy, Stellar Evolution, X Ray Astronomy, X Ray Spectra

Scientific paper

Established facts on 12 bright transient X-ray sources located near the galactic plane are summarized. Common features in the light curves of these sources are identified, the 'hard' and 'soft' spectral types are delineated, and it is noted that the 'hard' sources A1118-61 and A0535+26 exhibit pulsed X-rays. Variable mass transfer in a close binary system containing a degenerate star is shown to be the most likely explanation for the bright galactic-plane transients, and a black-hole secondary of about 9 solar masses is inferred for A0620-00. Recent observations of faint X-ray transients at high galactic latitude are also reviewed. It is noted that A1103+38 might be associated with a BL Lac-type object and that 3U 1439-39 has been tentatively identified with the galactic cometary globule NGC 5367 (an apparent region of star formation).

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