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2001MNRAS.325.1253G - Mon. Not. R. Astron. Soc., 325, 1253-1265 (2001/August-2)
Application of a relativistic accretion disc model to X-ray spectra of LMC X-1 and GRO J1655-40.
GIERLINSKI M., MACIOLEK-NIEDZWIECKI A. and EBISAWA K.
Abstract (from CDS):
We fit the ASCA soft-state X-ray spectra of LMC X-1 and GRO J1655-40 by this model. We find that, having additional limits on the black hole mass and inclination angle from optical/UV observations, we can constrain the black hole spin from X-ray data. In LMC X-1 the constraint is weak, and we can only rule out the maximally rotating black hole. In GRO J1655-40 we can limit the spin much better, and we find 0.68≤a≤0.88. Accretion discs in both sources are radiation-pressure dominated. We do not find Compton reflection features in the spectra of any of these objects.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): accretion, accretion discs - relativity - stars: individual: GRO J1655-40 - stars: individual: LMC X-1 - X-rays: stars
Simbad objects: 6
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