Cover Page The following handle holds various files of this Leiden University dissertation: http://hdl.handle.net/1887/79263

4 On the Selection of High-z Quasars Using LOFAR Observations 87 4.1

By the end of the sixties, Schmidt had studied a large sample of quasars and dened what he considered to be their properties: star-like morphology associated with a radio

We take advantage of the higher quasar numbers of our sample and divide each redshift bin into smaller bins using radio-loudness and the virial BH masses as indicators, and still

Of these 1978 are identied by PyBDSF with the source structure code M (i.e. sources with multiple components or complex structure), and the rest are classied as S (i.e. tted by

Our selection method exploits a variety of quasar observational properties to identify them in our survey data. We apply color cuts that diminish the fraction of stars and

Figure 5.16 displays the space density of RSQs (M 1450 < −22.0) from our sample as a function of redshift, along with other faint quasar samples from the literature.. Our

2002, in Society of Photo-Optical Instrumentation Engineers (SPIE) Con- ference Series, Vol. 4836, Survey and Other Telescope Technologies and Discoveries, ed.. 1990, in

Verder vinden we dat de mate waarin quasars zich groeperen afhangt van de massa van de bijbehorende zwarte gaten, waarbij quasars met zwaardere zwarte gaten sterker groeperen