view Abstract Citations (41) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cosmic X-Ray Sources Tucker, Wallace Abstract The line emission from Scorpius XR-1 in the 1-10 keV range is computed on the assumption that it is a hot, low-density plasma with a temperature of 5 X 10 K. Since the intensity of the line emission from an ion is proportional to the relative abundance of the ion, observations in this range should yield information concerning the abundances of the elements in an X-ray source. Also, they would provide a means for distinguishing between radiation from a hot gas and synchrotron radiation. Theoretical estimates of the X-ray emission to be expected from various objects are presented, and it is concluded, among other things, that the X-ray emission from a nova should be observable if it occurs within a distance of 1 kpc. A large flare from aC Ma might also be detectable at X-ray energies. The synchrotron hypothesis for the X-ray emission from the Crab Nebula is examined by considering the time variations in the electron spectrum due to synchrotron losses, expansion, Fermi acceleration, and injection of electrons into the source. A number of models are constructed which are consistent with the radio, optical, and X-ray observations. Publication: The Astrophysical Journal Pub Date: June 1967 DOI: 10.1086/149199 Bibcode: 1967ApJ...148..745T full text sources ADS |