Multiwavelength Study of the 1998 Outburst of XTE J1550-564

Details Multiwavelength Study of the 1998 Outburst of XTE J1550-564 Multiwavelength Study of the 1998 Outburst of XTE J1550-564

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.3112s&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #31.12; Bulletin of the American Astronomical Society, Vol. 32, p.1234

Astronomy and Astrophysics

Astronomy

Scientific paper

We present observations of the September 1998 outburst of the black-hole candidate XTE J1550-564 in the radio, optical and X-ray bands. Each light-curve shows a sequence of rising and declining phases, before the system settled into a ``soft state'' characteristic of black-hole binaries. We discuss the properties of the various phases at each wavelength. We propose that the companion star in XTE J1550-564 is a low-mass, evolved magnetic star, with a surface field strong enough to influence the dynamics of mass transfer. The initial impulsive rise in the hard X-rays is explained by instantaneous transfer of matter with low angular momentum from the magnetic companion. The giant flare is due to the instability of accretion during the condensation of a disk.

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