The host galaxies of radio-quiet quasars at 0.5 < z < 1.0

: Hyvonen T, Kotilainen JK, Orndahl E, Falomo R, Uslenghi M

Publisher: EDP SCIENCES S A

: 2007

ASTRONOMY & ASTROPHYSICS

: ASTRON ASTROPHYS

: 462

: 2

: 525

: U100

: 14

: 0004-6361

DOI: https://doi.org/10.1051/0004-6361:20065429

The RQQ host galaxies are luminous (average MH = - 26.3 +/- 0.6) and large giant elliptical galaxies (average bulge scale length R(e) = 11.3 +/- 5.8 kpc). RQQ hosts are similar to 1 mag brighter than the typical low redshift galaxy luminosity L*, and their sizes are similar to those of galaxies hosting lower redshift RQQs, indicating that there is no significant evolution at least up to z similar to 1 of the host galaxy structure. We also find that RQQ hosts are similar to 0.5-1 mag fainter than radio-loud quasar (RLQ) hosts at the similar redshift range. The comparison of the host luminosity of intermediate redshift RQQ hosts with that for lower z sources shows a trend that is consistent with that expected from the passive evolution of the stars in the host galaxies. The nuclear luminosity and the nucleus/host galaxy luminosity ratio of the objects in our sample are intermediate between those of lower redshift RQQs and those of higher redshift (z > 1) RQQs.