articleAstronomy and AstrophysicsSep 16, 2005BRONZE OA

Luminosity-dependent evolution of soft X-ray selected AGN

GHG. HasingerTMT. MiyajiMSMaarten Schmidt

Max Planck Institute for Extraterrestrial Physics · Carnegie Mellon University · +1 more institution

Indexed incrossrefdoaj

Abstract

We present new results on the cosmological evolution of unabsorbed (type-1) active galactic nuclei (AGN) selected in the soft (0.5-2 keV) X-ray band. From a variety of ROSAT, XMM-Newton and Chandra surveys we selected a total of ~1000 AGN with an unprecedented spectroscopic and photometric optical/NIR identification completeness. For the first time we are able to derive reliable space densities for low-luminosity (Seyfert-type) X-ray sources at cosmological redshifts. The evolutionary behaviour of AGN shows a strong dependence on X-ray luminosity: while the space density of high-luminosity AGN reaches a peak around , similar to that of optically selected QSO, the space density of low-luminosity AGNs peaks at…

Citation impact

636
total citations
FWCI
29.69
Percentile
100%
References
62
Citations per year

Authors

3

Topics & keywords

Topics
Keywords
  • ROSAT
  • Astrophysics
  • Physics
  • Luminosity
  • Redshift
  • Active galactic nucleus
  • X-ray
  • Astronomy
No related works found for this paper.

Funding