5 citations · 12 across the 3 of their papers we have counts for
5 papers · 1 filter
X-ray absorption in Compton-thin AGN: the predictions of a model revisited
A. Lamastra, G. C. Perola, G. Matt
The evidence of a decrease with increasing luminosity of the fraction f_{abs} of absorbed and Compton-thin among X-ray (2-10 keV) selected AGN is observationally rather well suppor…
AGN counts at 15um. XMM observations of the ELAIS-S1-5 sample
F. La Franca, S. Puccetti, N. Sacchi +7
Context: The counts of galaxies and AGN in the mid infra-red (MIR) bands are important instruments for studying their cosmological evolution. However, the classic spectral line rat…
A possible bias on the estimate of Lbol/Ledd in AGN as a function of luminosity and redshift
Alessandra Lamastra, Giorgio Matt, G. Cesare Perola
The BH mass (and the related Eddington ratio) in broad line AGN is usually evaluated by combining estimates (often indirect) of the BLR radius and of the FWHM of the broad lines, u…
A model for the X-ray absorption in Compton--thin AGN
Alessandra Lamastra, G. Cesare Perola, Giorgio Matt
The fraction of AGN with photoelectric absorption in the X-rays ranging from NH of 10^{22} up to about 10^{24} cm^{-2} (Compton-thin) appears observationally to be anticorrelated t…
The HELLAS2XMM survey. VII. The hard X-ray luminosity function of AGN up to z=4: more absorbed AGN at low luminosities and high redshifts
F. La Franca, F. Fiore, A. Comastri +14
We have determined the cosmological evolution of the density of AGN and of their Nh distribution as a function of the un-absorbed 2-10 keV luminosity up to redshift 4. We used the…