XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured Quasars

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

33 pages, 10 figures, to appear in A&A

Scientific paper

10.1051/0004-6361:20041468

We present the results of a deep (about 80 ks) XMM-Newton survey of the largest sample of near-infrared selected Extremely Red Objects (R-K>5) available to date to K_S< 19.2. At the relatively bright X-ray fluxes (F_{2-10 keV}> 4x10^{-15} cgs) and near-infrared magnitude probed by the present observations, the fraction of AGN (i.e., X-ray detected) among the ERO population is small (~3.5%); conversely, the fraction of EROs among hard X-ray selected sources is much higher (~20%). The X-ray properties of EROs detected in our XMM-Newton observation indicate absorption in excess of 10^{22} cm^{-2} in a large fraction of them. We have also considered additional samples of X-ray detected EROs available in the literature. X-ray spectral analysis of the highest S/N sources unambiguously indicates that large columns of cold gas (even >10^{23} cm^{-2}) are the rule rather than the exception. The X-ray, optical, and near-infrared properties of those X-ray selected EROs with a spectroscopic or photometric redshift nicely match those expected for quasars 2, the high-luminosity, high-redshift obscured AGNs predicted in baseline XRB synthesis models. A close correlation is detected between X- and K-band fluxes. For the AGN EROs this is consistent, under reasonable assumptions, with the relation established locally between the host galaxies and their central black holes. This suggest that the majority of EROs are powered by massive black holes accreting, on average, at about 0.03-0.1 of the Eddington limit.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured Quasars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured Quasars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-244929

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.