Low-energy Galactic centre gamma-rays from low-mass X-ray binaries

Details Low-energy Galactic centre gamma-rays from low-mass X-ray binaries Low-energy Galactic centre gamma-rays from low-mass X-ray binaries

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.336..558k&link_type=abstract

Nature (ISSN 0028-0836), vol. 336, Dec. 8, 1988, p. 558-560. Research supported by NASA and NSF.

Astronomy and Astrophysics

Astronomy

29

Galactic Radiation, Gamma Ray Astronomy, Milky Way Galaxy, Neutron Stars, X Ray Binaries, Black Holes (Astronomy), Compton Effect, Galactic Nuclei

Scientific paper

The hard X-ray and low-energy γ-ray emission from the Galactic Centre region (GCR) has four components. The authors propose non-thermal processes in low-mass X-ray binaries concentrated in the galactic bulge as the direct source of the three continuum components of the emission and also, possibly, as the indirect source of the 511-keV line. They suggest that the softer power-law component of the GCR continuum arises from synchrotron emission of relativistic electrons in the strongly non-uniform magnetic field of the neutron star, and, more tentatively, that the MeV bump is the result of interaction of harder γ-rays with the power-law photons. The hardest power law may be due to Compton scattering of relativistic electrons or photons.

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