Proposal ID | 050546 |
Title | The evolution of powerful AGN at high redshift |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505460101 |
DOI | https://doi.org/10.5270/esa-yo84ldd |
Principal Investigator, PI | Prof Kirpal Nandra |
Abstract | The form and evolution of the X-ray luminosity function (XLF) of high z AGN, andhence the importance of black hole accretion in the early universe, is poorlyconstrained. A combination of deep, multi-colour optical imaging and X-ray datahas proved highly efficient in compiling high z AGN samples with well definedselection and minimal incompleteness, and shows that the faint-end slope of theXLF at z=3 is significantly steeper than previously reported. Our current surveystill has limited statistics around and above L*, however. The first datarelease of the CFHTLS Deep Fields provides an opportunity to rectify this.Relatively modest investment of XMM time (~200ks) will provide almost completeX-ray coverage over 4 square deg, enabling us to accurately determine the XLF at z=3-4. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2007-05-07T11:18:19Z/2007-11-05T08:50:21Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
Date Published | 2008-12-11T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "xray data", "relatively modest investment", "square deg", "complete xray coverage", "limited statistics", "cfhtls deep fields", "data release", "z agn samples", "blackhole accretion", "defined selection", "poorly constrained", "minimal incompleteness", "z agn", "XMM", "xmm time", "powerful agn" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Kirpal Nandra, 2008, 'The evolution of powerful AGN at high redshift', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-yo84ldd |