المستودع الأكاديمي جامعة المدينة

The evolutionary sequence of active galactic nuclei and galaxy formation revealed

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dc.creator Page, M. J.
dc.creator Stevens, J. A.
dc.creator Ivison, R. J.
dc.creator Carrera, Francisco J.
dc.date 2008-05-02T02:45:11Z
dc.date 2008-05-02T02:45:11Z
dc.date 2004-07-08
dc.date.accessioned 2017-01-31T01:09:10Z
dc.date.available 2017-01-31T01:09:10Z
dc.identifier arXiv:astro-ph/0407171v1
dc.identifier Astrophys. J. 611(2): L85-L88 (2004)
dc.identifier 0004-637X (Print)
dc.identifier 1538-4357 (Online)
dc.identifier http://hdl.handle.net/10261/3969
dc.identifier 10.1086/423892
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3969
dc.description Accepted for publication in ApJ letters.
dc.description Today, almost every galaxy spheroid contains a massive black hole: a remnant of, and testament to, a period in its evolution when it contained an active galactic nucleus (AGN). However, the sequence and timescales of the formation of the black hole and surrounding spheroid of stars are completely unknown, leaving a large gap in our knowledge of how the Universe attained its present appearance. Here we present submillimeter observations of matched samples of X-ray absorbed and unabsorbed AGN which have luminosities and redshifts characteristic of the sources responsible for most of the mass in present day black holes. Strong submillimeter emission, an isotropic signature of copious star formation, is found only in the X-ray absorbed sample, ruling out orientation effects as the cause of the absorption. The space density and luminosity range of the X-ray absorbed AGN indicate that they are undergoing the transition between a hidden growth phase and an unabsorbed AGN phase, and implies that the X-ray absorbed period in the AGN's evolution coincides with the formation of the galaxy spheroid.
dc.description The James Clerk Maxwell Telescope is operated on behalf of the Particle Physics and Astronomy Research Council of the United Kingdom, the Netherlands Organisation for Scientific Research and the National Research Council of Canada. FJC acknowledges financial support by the Spanish Ministerio de Ciencia y Tecnología, under grant ESP2003-00812.
dc.description Peer reviewed
dc.format 157081 bytes
dc.format application/pdf
dc.language eng
dc.publisher American Astronomical Society
dc.publisher University of Chicago Press
dc.relation Preprint
dc.rights openAccess
dc.subject Galaxies: evolution
dc.subject Galaxies: formation
dc.subject Galaxies: active
dc.subject Astrophysics
dc.title The evolutionary sequence of active galactic nuclei and galaxy formation revealed
dc.type Pre-print


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