Showing 1998Show all
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astro-ph1998
Extremely Red Galaxies: Old or Dusty ?
Andrea Cimatti, Paola Andreani, Huub Röttgering +1
The nature of the extremely red galaxies is poorly known, the critical issue being whether they are old ellipticals at or distant star-forming galaxies strongly reddened by…
astro-ph1998
The luminosity function and clustering evolution of Quasars
S. Cristiani, F. La Franca, P. Andreani
Recent results have questioned the description of the QSO luminosity function in terms of a pure luminosity evolution and call for a luminosity dependent luminosity evolution. Meas…
astro-ph1998
The evolution of the clustering of QSOs
F. La Franca, P. Andreani, S. Cristiani
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…