XMM-Newton observations of an absorbed z=0.67 QSO: no dusty torus?

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dc.creatorGeorgantopoulos, I.
dc.creatorGeorgakakis, A.
dc.creatorStewart, G. C.
dc.creatorAkylas, A.
dc.creatorBoyle, B. J.
dc.creatorShanks, T.
dc.creatorGriffiths, R. E.
dc.date2003-02-19
dc.date.accessioned2026-07-07T10:47:35Z
dc.date.available2026-07-07T10:47:35Z
dc.descriptionWe present XMM-Newton observations of AXJ0341.4-4453, a mildly reddened A_V<7 QSO at a redshift of z=0.672. The XMM-Newton spectrum shows a large obscuring column N_H~10^23 cm^{-2} corresponding to A_V~70, in agreement with previous results based on the lower limit of the ASCA hardness ratio. The X-ray spectrum is represented by a 'scattering' model with Gamma~2.0 with the scattered power-law normalization being a few per cent of the hard component. No FeK line is detected with a 90 per cent upper limit on its equivalent width of ~360eV. The large discrepancy between the column density observed in X-rays and that inferred from the Balmer decrement can be explained by dust sublimation near the nucleus. Then, the X-ray and the optical obscuration come from two different regions: the X-ray close to the accretion disk while the optical at much larger >0.25pc scales.
dc.descriptionTo appear in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0302375
dc.identifierhttp://arxiv.org/abs/astro-ph/0302375
dc.identifierMon.Not.Roy.Astron.Soc.342:321,2003
dc.identifierdoi:10.1046/j.1365-8711.2003.06547.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183584
dc.subjectAstrophysics
dc.titleXMM-Newton observations of an absorbed z=0.67 QSO: no dusty torus?
dc.typetext

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