SIMBAD references

2009ApJ...703.2171S - Astrophys. J., 703, 2171-2176 (2009/October-1)

Constraining the spin of the black hole in Fairall 9 with Suzaku.

SCHMOLL S., MILLER J.M., VOLONTERI M., CACKETT E., REYNOLDS C.S., FABIAN A.C., BRENNEMAN L.W., MINIUTTI G. and GALLO L.C.

Abstract (from CDS):

We report on the results of spectral fits made to data obtained from a 168 ks Suzaku observation of the Seyfert 1 galaxy Fairall 9. The source is clearly detected out to 30 keV. The observed spectrum is fairly simple; it is well described by a power law with soft excess and disk reflection. A broad iron line is detected, and easily separated from distinct narrow components owing to the resolution of the CCDs in the X-ray Imaging Spectrometer (XIS). The broad line is revealed to be asymmetric, consistent with a disk origin. We fit the XIS and Hard X-ray Detector spectra with relativistically blurred disk reflection models. With the assumption that the inner disk extends to the innermost stable circular orbit, the best-fit model implies a black hole spin parameter of a = 0.60±0.07 and excludes extremal values at a high level of confidence. We discuss this result in the context of Seyfert observations and models of the cosmic distribution of black hole spin.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: active - relativity - X-rays: galaxies

Simbad objects: 3

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