Optical observations of compact X-ray sources

Details Optical observations of compact X-ray sources Optical observations of compact X-ray sources

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phdt.........4d&link_type=abstract

Ph.D. Thesis California Univ., Berkeley.

Astronomy and Astrophysics

Astronomy

5

Constellations, Galaxies, X Ray Sources, Astronomical Models, Astronomical Observatories, Emission Spectra, Pulsars, Radio Astronomy, Research Projects

Scientific paper

Research progress in optical studies of compact galactic X-ray sources conducted at Lick and Leuschner Observatories of the University of California is reported. Results of this program include the identification of the X-ray pulsar Hercules X-1 with the unusual variable star HZ Herculis and the discovery of low amplitude optical pulsations from the system. The X-ray source 3U 0614+09 was optically identified with an 18th magnitude blue star which is similar to the optical counterpart of Sco X-1. An extensive search for the optical counterparts of nine compact X-ray sources near the galactic center is also described. Several interesting candidates have been observed, including a peculiar strong emission line object likely to be associated with 3U 1728-24. A detailed investigation of the energy distribution of the optical pulses in HZ Her was carried out. A theoretical model for old population binary X-ray sources was developed and applied to explain to the observed features of Cygnus X-3. In addition to explain X-ray and infrared variability of Cyg X-3, the model also provides a natural explanation of several features of the radio outbursts which this source displays.

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