AGN predictions for the Hubble Deep Field and the X-ray background
- 11 June 1997
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 288 (1) , L19-L22
- https://doi.org/10.1093/mnras/288.1.l19
Abstract
We estimate the number of active galactic nuclei (AGN) among the galaxies in the Hubble Deep Field (HDF). The recent discovery of a class of X-ray-luminous narrow emission line galaxies has provided a possible explanation for the origin of the X-ray background (XRB), although the nature of the activity is still unresolved. By extrapolating the observed X-ray number count distribution to faint optical magnitudes we predict that this AGN population could account for a significant fraction, ∼10 per cent, of the galaxies in the HDF. In contrast, normal broad-line QSOs are expected to account for no more than ∼0.1 per cent of the sources at these magnitudes.Keywords
All Related Versions
This publication has 0 references indexed in Scilit: