Exploring the high frequency emission of radio loud X-ray binaries

Details Exploring the high frequency emission of radio loud X-ray binaries Exploring the high frequency emission of radio loud X-ray binaries

2000-05-25

arxiv.org/abs/astro-ph/0005517v1

Astronomy and Astrophysics, 357, 507-514 (2000)

Astronomy and Astrophysics

Astrophysics

8 pages, 5 figures, LaTeX, uses aa.cls. Published in A&A, 357, 507-514 (2000)

Scientific paper

We report millimetre-wave continuum observations of the X-ray binaries Cygnus X-3, SS 433, LSI+61 303, Cygnus X-1 and GRS 1915+105. The observations were carried out with the IRAM 30 m-antenna at 250 GHz (1.25 mm) from 1998 March 14 to March 20. These millimetre measurements are complemented with centimetre observations from the Ryle Telescope, at 15 GHz (2.0 cm) and from the Green Bank Interferometer at 2.25 and 8.3 GHz (13 and 3.6 cm). Both Cygnus X-3 and SS 433 underwent moderate flaring events during our observations, whose main spectral evolution properties are described and interpreted. A significant spectral steepening was observed in both sources during the flare decay, that is likely to be caused by adiabatic expansion, inverse Compton and synchrotron losses. Finally, we also report 250 GHz upper limits for three additional undetected X-ray binary stars: LSI+65 010, LSI+61 235 and X Per.

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