Abstract
We have analysed the XMM-Newton and Chandra data overlapping ~16.5 deg2 of Sloan Digital Sky Survey Stripe 82, including ~4.6 deg2 of proprietary XMM-Newton data that we present here. In total, 3362 unique X-ray sources are detected at high significance. We derive the XMM-Newton number counts and compare them with our previously reported Chandra logN-logS relations and other X-ray surveys. The Stripe 82 X-ray source lists have been matched to multiwavelength catalogues using a maximum likelihood estimator algorithm.We discovered the highest redshift (z = 5.86) quasar yet identified in an X-ray survey. We find 2.5 times more high-luminosity (Lx = 1045 erg s-1) AGN than the smaller area Chandra and XMM-Newton survey of COSMOS and 1.3 times as many identified by XBoötes. Comparing the high-luminosity active galactic nuclei (AGN) we have identified with those predicted by population synthesis models, our results suggest that this AGN population is a more important component of cosmic black hole growth than previously appreciated. Approximately a third of the X-ray sources not detected in the optical are identified in the infrared, making them candidates for the elusive population of obscured high-luminosity AGN in the early universe
Original language | English (US) |
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Article number | stt1837 |
Pages (from-to) | 3581-3601 |
Number of pages | 21 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 436 |
Issue number | 4 |
DOIs | |
State | Published - Dec 2013 |
Externally published | Yes |
Keywords
- Catalogues
- X-rays:Galaxies
- galaxies:Active
- quasars:General
- quasars:Supermassive black holes
- surveys
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science