Physics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21940706c&link_type=abstract
American Astronomical Society, AAS Meeting #219, #407.06
Physics
Scientific paper
The X-ray binary LMC X-3 represents a useful, "partially-controlled” experiment in accretion. The primary feeds by Roche-lobe overflow of a main-sequence star in a very circular orbit, our viewing angle does not likely intersect any warps or the flared rim of the disk, and while we typically see a spectrum dominated by a persistent blackbody component, there is still considerable variation in luminosity and the flux in the power-law tail, and occasionally more extreme state transitions.
We infer the innermost disk and coronal mass fluxes in time based on the spectra, and observe quasi-periodic positive pulses in coronal flow followed with some delay by long drops in disk flow (c.f. Smith et al. 2007 ApJ...669.1138S). We find that models where constant total mass supply is split between independent disk and coronal flows at the circularization radius, even if we consider an unobserved outflow, cannot explain the data. We show our latest progress towards an answer using a model that does incorporate mass transfer between disk and corona by coupling a numerically evolved disk to the evaporation/condensation physics of Liu et al. 2007 ApJ...71.695L. (This work is supported through NASA's ADAP program)
Cambier Hal J.
Smith Douglas
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