dc.contributor.author | Page, M. J. | |
dc.contributor.author | Carrera, F. J. | |
dc.contributor.author | Stevens, J. A. | |
dc.contributor.author | Ebrero, J. | |
dc.contributor.author | Blustin, A. J. | |
dc.date.accessioned | 2013-01-07T15:59:23Z | |
dc.date.available | 2013-01-07T15:59:23Z | |
dc.date.issued | 2011-10 | |
dc.identifier.citation | Page , M J , Carrera , F J , Stevens , J A , Ebrero , J & Blustin , A J 2011 , ' The nature of X-ray-absorbed quasi-stellar objects ' , Monthly Notices of the Royal Astronomical Society , vol. 416 , no. 4 , pp. 2792-2801 . https://doi.org/10.1111/j.1365-2966.2011.19226.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ORCID: /0000-0002-4010-8310/work/62747563 | |
dc.identifier.uri | http://hdl.handle.net/2299/9498 | |
dc.description | The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society | |
dc.description.abstract | There exists a significant population of broad line, z similar to 2 quasi-stellar objects ( QSOs) which have heavily absorbed X-ray spectra. Follow-up observations in the submillimetre show that these QSOs are embedded in ultraluminous starburst galaxies, unlike most unabsorbed QSOs at the same redshifts and luminosities. Here we present X-ray spectra from XMM-Newton for a sample of five such X-ray-absorbed QSOs that have been detected at submillimetre wavelengths. We also present spectra in the rest-frame ultraviolet from ground-based telescopes. All the five QSOs are found to exhibit strong CIV absorption lines in their ultraviolet spectra with equivalent width >5 angstrom. The X-ray spectra are inconsistent with the hypothesis that these objects show normal QSO continua absorbed by low-ionization gas. Instead, the spectra can be modelled successfully with ionized absorbers, or with cold absorbers if they possess unusually flat X-ray continuum shapes and unusual optical to X-ray spectral energy distributions. We show that the ionized absorber model provides the simplest, most self-consistent explanation for their observed properties. We estimate that the fraction of radiated power that is converted into kinetic luminosity of the outflowing winds is typically similar to 4 per cent, in agreement with recent estimates for the kinetic feedback from QSOs required to produce the M-sigma relation, and consistent with the hypothesis that the X-ray-absorbed QSOs represent the transition phase between obscured accretion and the luminous QSO phase in the evolution of massive galaxies. | en |
dc.format.extent | 10 | |
dc.format.extent | 398664 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | galaxies: active | |
dc.subject | galaxies: evolution | |
dc.subject | galaxies: formation | |
dc.subject | X-rays: galaxies | |
dc.title | The nature of X-ray-absorbed quasi-stellar objects | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1111/j.1365-2966.2011.19226.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |