A Comparison of the p-free Model and the Hot MCD Model in ULXs

Details A Comparison of the p-free Model and the Hot MCD Model in ULXs A Comparison of the p-free Model and the Hot MCD Model in ULXs

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1053..117w&link_type=abstract

OBSERVATIONAL EVIDENCE FOR BLACK HOLES IN THE UNIVERSE: Proceedings of the 2nd Kolkata Conference on Observational Evidence for

Physics

2

Infall, Accretion, And Accretion Disks, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Galactic Nuclei, Circumnuclear Matter, And Bulges

Scientific paper

Recently M33 X-8 and NGC 2403 X-1 were found to be best fitted with the hot MCD model, rather than the cool MCD model. But the hot disk model was self-inconsistent. The physical model, p-free model, is used to fit the spectral of these two sources, and statically acceptable fits are given in this paper. For comparison, we investigate the profile of spectral carefully. The slight differences between the p-free model and the hot MCD model are found above ~7 keV. Thus we argue that the stellar-mass black holes harbor in the ULXs. We suggest that the differences are the evidence for the Wien tail of thermal emission, and the spectral observations in the ~10-20 keV are the key discriminator between the p-free model and the hot MCD model.

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