ujbr photometry and redshifts of QSOs (Cirasuolo+,

Details ujbr photometry and redshifts of QSOs (Cirasuolo+, ujbr photometry and redshifts of QSOs (Cirasuolo+,

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ycat..73410993c&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/341/993. Originally published in: 2003MNRAS.341..993C

Physics

Qsos, Radio Sources, Photometry, Redshifts

Scientific paper

We present a detailed analysis of a sample of radio-detected quasars, obtained by matching together objects from the FIRST () survey and the 2dF Quasar Redshift Survey (2dF, ). The data set consists of 113 sources, spanning a redshift range 0.35<~z<~2.2, with optical magnitudes 18.25<=bj<=20.85 and radio fluxes S1.4GHz>=1mJy. These objects exhibit properties such as redshift and colour distribution in full agreement with those derived for the whole quasar population, suggesting that the mechanism(s) controlling the birth and lifetime of quasars are independent of their level of radio emission. The long-debated question of the radio-loud/radio quiet (RL/RQ) dichotomy is then investigated for the combined FIRST-2dF and FIRST-LBQS (Large Bright Quasar Survey) samples, as they present similar selection criteria.
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