Galaxy clustering in QS0 fields at z=1-1.5: Evidence for galaxy luminosity evolution.
01 January 1986
A CCD survey of a complete sample of 42 QS0 fields shows a significant excess of detected galaxies within 30 arcsec of the QS0, even for QS0 redshifts in the range 1 - 1.5. This would not be expected for the R21 limiting magnitude of this survey, unless either (1) foreground clusters were statistically correlated with the QS0 position (gravitational lensing) or, (2) galaxies physically associated with QS0s in that redshift range are over 2 mag brighter than now. The most likely explanation is luminosity evolution in the galaxies within 150 h(-1) kpc of the QS0.