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An XMM-Newton view of the 'bare' nucleus of Fairall 9 | | D. Emmanoulopoulos
; I. E. Papadakis
; I. M. McHardy
; F. Nicastro
; S. Bianchi
; P. Arevalo
; | | Date: |
1 Apr 2011 | | Abstract: | We present the spectral results from a 130 ks observation, obtained from the
X-ray Multi-Mirror Mission-Newton (XMM-Newton) observatory, of the type I
Seyfert galaxy Fairall 9. An X-ray hardness-ratio analysis of the light-curves,
reveals a ’softer-when-brighter’ behaviour which is typical for radio-quiet
type I Seyfert galaxies. Moreover, we analyse the high spectral-resolution data
of the reflection grating spectrometer and we did not find any significant
evidence supporting the presence of warm-absorber in the low X-ray energy part
of the source’s spectrum. This means that the central nucleus of Fairall 9 is
’clean’ and thus its X-ray spectral properties probe directly the physical
conditions of the central engine. The overall X-ray spectrum in the 0.5-10 keV
energy-range, derived from the EPIC data, can be modelled by a relativistically
blurred disc-reflection model. This spectral model yields for Fairall 9 an
intermediate black-hole best-fit spin parameter of
$alpha=0.39^{+0.48}_{-0.30}$. | | Source: | arXiv, 1104.0044 | | Services: | Forum | Review | PDF | Favorites | |
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