Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915316w&link_type=abstract
American Astronomical Society, AAS Meeting #219, #153.16
Astronomy and Astrophysics
Astronomy
Scientific paper
It is now well established that changes in the X-ray spectral state of black hole X-ray binaries are correlated with changes in the radio properties of those systems. Assuming radio power is a proxy for jet power, we can say that the jet is steady in the hard state and undetectable (and therefore weaker) in the soft state. Since the different accretion states are also generally assumed to be associated with different disk geometries -- the hard state associated with a hot, thick flow, and the soft state with a cold, thin disk -- we investigate the possibility that these two phenomena are linked; i.e., that the difference in disk geometry is the cause for the difference in observed jet power between spectral states. We do this by comparing various measures of jet power in numerical simulations of accretion disks of differing temperatures and thicknesses. We perform these simulations using the general relativistic magnetohydrodynamic code Cosmos++ and a newly added cooling function, which allows us to regulate the disk scale height h/r at different radii.
Fragile P.
Rodríguez Manuel
Wilson Julia
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