The host galaxies of low luminosity quasars at high redshift

Details The host galaxies of low luminosity quasars at high redshift The host galaxies of low luminosity quasars at high redshift

2005-12-14

arxiv.org/abs/astro-ph/0512356v1

New Astron.Rev.50:772-775,2006

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, to appear in "QSO Hosts: Evolution and Environment", P.D. Barthel, D.B. Sanders, eds., August 2005, Leiden

Scientific paper

10.1016/j.newar.2006.06.037

We present VLT/ISAAC near-infrared imaging of the host galaxies of 15 low luminosity quasars at 1 < z < 2. This work complements our studies to trace the cosmological evolution of the host galaxies of high luminosity quasars. The radio-loud (RLQ) and radio-quiet (RQQ) quasars have similar distribution of redshift and luminosity, and together the high and low luminosity quasars cover a large range of the quasar luminosity function. Both RLQ and RQQ hosts resemble massive inactive ellipticals undergoing passive evolution. However, RLQ hosts are systematically more luminous than RQQ hosts, as also found for the high luminosity quasars. The difference in the host luminosity remains the same from z = 2 to z = 0. For the entire set of quasars, we find a correlation between the nuclear and the host luminosities, albeit with a large scatter. The correlation is less apparent for the RQQs than for the RLQs.

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