Cycles in outbursts-the case of GRS 1747-312

Details Cycles in outbursts-the case of GRS 1747-312 Cycles in outbursts-the case of GRS 1747-312

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..203s&link_type=abstract

X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer

Astronomy and Astrophysics

Astronomy

X-Ray Sources (Astronomical), Magnetic Fields, Brightness, Interstellar Matter, X-Ray Sources, X-Ray Bursts, Magnetic And Electric Fields, Polarization Of Starlight, Luminosity And Mass Functions, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus

Scientific paper

We reveal that the mean outburst recurrence time TC = 136 days of soft X-ray transient GRS 1747-312 displays a cyclic behavior. The most luminous outbursts occur near the longest TC. We argue that although the cycle-length of 5.4 years is compatible with that of the magnetic activity of the late-type donor, it cannot be explained by variations of the mass outflow from the donor to the disk. In our interpretation, the stellar activity is translated to variations of TC via interaction of the magnetic field of the spots on the donor with the magnetic field of the disk.

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