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Article Dans Une Revue The Astrophysical Journal Année : 2009

Constraining the Spin of the Black Hole in Fairall 9 with Suzaku

Résumé

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.

Dates et versions

hal-03742192 , version 1 (02-08-2022)

Identifiants

Citer

S. Schmoll, Jon M. Miller, Marta Volonteri, E. Cackett, Christopher S. Reynolds, et al.. Constraining the Spin of the Black Hole in Fairall 9 with Suzaku. The Astrophysical Journal, 2009, 703, pp.2171-2176. ⟨10.1088/0004-637X/703/2/2171⟩. ⟨hal-03742192⟩
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