The Asiago-ESO/RASS QSO Survey. I.The Catalog and the Local QSO Luminosity Function

Details The Asiago-ESO/RASS QSO Survey. I.The Catalog and the Local QSO Luminosity Function The Asiago-ESO/RASS QSO Survey. I.The Catalog and the Local QSO Luminosity Function

2000-02-08

arxiv.org/abs/astro-ph/0002183v3

Astronomy and Astrophysics

Astrophysics

54 pages Latex, with 7 PostScript figures. Some minor changes. Astronomical Journal, in press

Scientific paper

10.1086/301398

This paper presents the first results of a survey for bright quasars (V < 14.5 and R<15.4) covering the North Hemisphere at galactic latitudes |b|>30. The photometric database is derived from the GSC and USNO catalogs. Quasars are identified on the basis of their X-ray emission measured in the ROSAT All Sky Survey. The surface density of quasars brighter than 15.5 mag turns out to be $9 \pm 1 \cdot 10^{-3} deg^{-2}$, about 3 times higher than that estimated by the PG survey. The quasar optical Luminosity Function (LF) at $0.04 < z \le 0.3$ is computed and shown to be consistent with a Luminosity Dependent Luminosity Evolution of the type derived by La Franca and Cristiani (1997) in the range $0.3 < z \le 2.2$. The predictions of semi-analytical models of hierarchical structure formation agree remarkably well with the present observations.

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