Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7718988b&link_type=abstract
Presented at 8th Tex. Symp. on Relativistic Astrophys., Boston, 13-17 Dec. 1976
Astronomy and Astrophysics
Astronomy
Iron, Radio Sources (Astronomy), Spectral Emission, Stellar Radiation, X Ray Spectra, Cygnus Constellation, Magnetohydrodynamic Waves, Pulsars, Scorpius Constellation, Supernova Remnants
Scientific paper
The millisecond bursts from Cyg X-1 are investigated and the overall chaotic variability for the bulk of the Cyg X-1 emission is compared to that of Sco X-1, showing that the essential character is remarkably similar (i.e. shot noise) although the fundamental time scales involved differ widely, from a fraction of a second (for Cyg X-1) to a fraction of a day (for Sco X-1). Recent OSO-8 observations of spectra features attributable to iron are reviewed. In particular, line emission is discussed within the context of a model for thermal radiation by a hot evolved gas in systems as different as supernova remnants and clusters of galaxies. Newly observed spectral structure in the emission from the X-ray pulsar Her X-1 is reported.
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