The Environments of Optically Selected QSOS at 0.9<Z<1.5

Details The Environments of Optically Selected QSOS at 0.9<Z<1.5 The Environments of Optically Selected QSOS at 0.9<Z<1.5

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.264..604b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 264, NO. 3/OCT1, P. 604, 1993

Astronomy and Astrophysics

Astronomy

25

Scientific paper

Deep (R < 23) CCD images around 27 faint ( ~-24) radio-quiet QSOs in the redshift range 0.9 < z < 1.5 have been analysed to search for associations between QSOs and faint galaxies. No significant excess of galaxies is found around the QSOs, in marked contrast to previous studies of optically luminous, radio-loud QSOs. This result may reflect real differences between the environments of radio-loud and radio-quiet QSOs at intermediate redshifts. However, optical luminosity effects and the differential effect of gravitational lensing may also play an important role in the observed differences in the cluster environment between these two classes of QSO.

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