A multi-flow model for microquasars

Details A multi-flow model for microquasars A multi-flow model for microquasars

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..924..571p&link_type=abstract

THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. AIP Conference Proceedings, Volume 924, pp. 571-576

Computer Science

Quasars, X-Ray Binaries, Accretion And Accretion Disks

Scientific paper

We present a unified picture to explain the spectral states of BH binaries. In our view, the central regions have a multi-flow configuration consisting in (1) an outer standard accretion disc (SAD) down to a transition radius rtr, (2) an inner magnetized jet emitting disc (JED) below rtr driving (3) a self-collimated non relativistic MHD jet surrounding, when conditions for pair creation are met, (4) a ultra relativistic pair beam. Large values of rtr correspond to Hard states while small values correspond to Soft states. In between these extremes, in the high intermediate state, rtr can reach values that switch on a pair cascade process giving birth to ultra-relativistic pair blobs that explain the superluminal events. The nature of the X-ray variability in the hard state is also investigated by assuming an oscillating hot plasma at the jet basis whose temperature and density vary locally through the propagation of a magnetosonic wave. The variable comptonized spectra are computed through monte-carlo simulation. Preliminary results are discussed.

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