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Exploring structure around submm-bright QSO

AuthorsCarrera, Francisco J. CSIC ORCID CVN ; Page, M. J.; Stevens, J. A.; Ivison, R. J.; Falocco, Serena CSIC ORCID; Ebrero, Jacobo CSIC ORCID
Issue DateJul-2010
CitationThe Infrared/X-ray Connection in Galaxy Evolution: (2010)
AbstractWe have assembled a sample of X-ray and submm luminous QSOs which are therefore both growing their central black holes through accretion and forming stars copiously (Stevens+05). They are also surrounded by submm source overdensities (Stevens+10), placing them in the centres of high density peaks of the z~2 Universe, probably giving rise to massive ellipticals like those seen in the local Universe. We explore in detail here the field around one of those QSO: RX J0941 (z=1.82). Radio observations confirm the submm source detections and pinpoint the optical/NIR/MIR counterparts. We have used photometric redshifts and SED matching, showing that at least 4 of the 5 submm sources are associated to the QSO, with very little room for AGN contribution. These are mature galaxies with BH-to-stellar mass ratios about one dex below local values: most of their central BH mass is still to be accreted, which can happen in a few tens of My. The total mass is similar to that of a present-day cD galaxy and local stellar-to-BH masses can be reached if L3% of the available gas mass is accreted.
Description23 diapositivas.-- Trabajo presentado al Meeting "The Infrared/X-ray Connection in Galaxy Evolution" session 6: AGN feedback; celebrado en MSSL, UK, 2010.
Publisher version (URL)http://www.mssl.ucl.ac.uk/~nps/irx2010/Welcome.html
Appears in Collections:(IFCA) Comunicaciones congresos
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