Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esabu..40...38p&link_type=abstract
ESA Bulletin (ISSN 0376-4265), no. 40, Nov. 1984, p. 38-42.
Astronomy and Astrophysics
Astronomy
Black Holes (Astronomy), Exosat Satellite, Neutron Stars, X Ray Astronomy, X Ray Sources, Binary Stars, Light Curve
Scientific paper
The mechanisms of X-ray emission from Galactic black holes and neutron stars are discussed, and the contribution of the ESA Exosat orbiting X-ray observatory (launched in May 1983) to the characterization of these objects is indicated. The four classes of objects resulting from the collapse of red giants (SNRs, white dwarfs, neutron stars, and black holes) are described; the interaction of neutron stars and black holes in binary systems with their companions is examined; the production of X-ray pulsation in rotating neutron-star binaries and X-ray flickering in black-hole binaries is explained; and Exosat observations of Cyg X-1, Cyg X-3, and the X-ray burster 2S1636 - 536 are presented graphically. The observation of both flickering and pulsation in the black-hole candidate V0332 + 53 reveals that object to be a neutron star and suggests that flickering alone cannot be used to classify an object as a black hole.
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