Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978grsa.rept..252l&link_type=abstract
In its Gamma Ray Spectry. in Astrophys. p 252-274 (SEE N78-31971 22-88)
Astronomy and Astrophysics
Astronomy
9
Black Holes (Astronomy), Emission Spectra, Gamma Rays, Neutron Stars, Nuclear Interactions, Radiation Sources, Galactic Radiation, Line Spectra, Luminosity, Radio Sources (Astronomy), Red Shift
Scientific paper
Accreting compact objects may be important gamma ray line sources and may explain recent observations of celestial gamma-ray line emission from a transient source in the direction of the galactic anti-center, from the galactic center, and possibly from the radio galaxy Centaurus A. The identification of the lines from the transient source requires a strong redshift. Such a redshift permits the identification of these lines with the most intense nuclear emission lines expected in nature, positron annihilation, and neutron capture on hydrogen and iron. Their production as a result of nuclear interactions in accreting gas around a neutron star is proposed. The gamma-ray line emission from the galactic center and possibly Centaurus A appears to have a surprisingly high luminosity, amounting to perhaps as much as 10% of the total luminosity of these sources. Such high gamma-ray line emission efficiencies could result from nuclear interactions in accreting gas around a massive black hole.
Higdon James C.
Lingenfelter Richard E.
Ramaty Reuven
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