The evolution of QSO clustering is investigated with a new sample of 388 QSOs with 0.3 < z <= 2.2, B <= 20.5 and M_B < -23. Evidence is found for an increase of the clustering amplitude with increasing redshift. These measurements allow to further distinguish among the various physical scenarios proposed to interpret the QSO phenomenon. A single population model is inconsistent with the observations. The general properties of the QSO population would arise naturally if quasars are short-lived events connected to a characteristic halo mass ~5 cdot 1012 M_odot.
LA FRANCA, F., Andreani, P., Cristiani, S. (1999). The evolution of the clustering of QSOs. In Observational Cosmology: The Development of Galaxy Systems (pp.341). SAN FRANCISCO : Astronomical Society of the Pacific.
The evolution of the clustering of QSOs
LA FRANCA, Fabio;
1999-01-01
Abstract
The evolution of QSO clustering is investigated with a new sample of 388 QSOs with 0.3 < z <= 2.2, B <= 20.5 and M_B < -23. Evidence is found for an increase of the clustering amplitude with increasing redshift. These measurements allow to further distinguish among the various physical scenarios proposed to interpret the QSO phenomenon. A single population model is inconsistent with the observations. The general properties of the QSO population would arise naturally if quasars are short-lived events connected to a characteristic halo mass ~5 cdot 1012 M_odot.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
