Simultaneous X-ray and radio observations of GX 13 + 1

Details Simultaneous X-ray and radio observations of GX 13 + 1 Simultaneous X-ray and radio observations of GX 13 + 1

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..552g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 15, 1988, p. 552-555, 557, 558.

Astronomy and Astrophysics

Astronomy

14

Radio Astronomy, Radio Sources (Astronomy), Variable Stars, X Ray Astronomy, X Ray Binaries, Galactic Bulge, Interstellar Magnetic Fields, Particle Energy, Radiant Flux Density, Relativistic Electron Beams, Synchrotron Radiation

Scientific paper

The results of simultaneous X-ray and radio observations of GX 13 + 1, intrinsically one of the brightest Galactic bulge X-ray sources, are presented and possible models are discussed. No evidence is found for correlated X-ray and radio flux density variations. The variation of the 6-20 cm wavelength spectral index from +0.5 to -1.0 indicates that the radio flux is probably produced by a nonthermal emission mechanism. Application of an equipartition synchrotron model to the data suggests that the radio emission originates in a region with a magnetic field of about 1 gauss. If the radio flux density variations are due to injection of relativistic electrons, the equivalent nonthermal particle energy is 10 to the 36th - 10 to the 41st ergs/s.

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