The host galaxies of flat-spectrum quasars

Details The host galaxies of flat-spectrum quasars The host galaxies of flat-spectrum quasars

2003-02-25

arxiv.org/abs/astro-ph/0302514v1

New Astron.Rev. 47 (2003) 183-186

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures. To appear in "Radio galaxies: past, present & future". eds. M. Jarvis et al., Leiden, Nov 2002

Scientific paper

10.1016/S1387-6473(03)00022-8

We present the results of deep VLT-ISAAC Ks-band imaging of four z~1.5 flat-spectrum quasars selected from the Parkes half-Jansky flat spectrum sample. We find that the hosts of these flat-spectrum quasars are consistent with lying on the K-z Hubble relation for radio galaxies. This implies that the flat-spectrum quasar hosts fall in line with the expectations from orientation based unified schemes and also that they contain black holes of similar mass. Moreover, the width of the Hbeta broad emission line in these objects tends to be narrower than in their misaligned (low-frequency selected quasar) counterparts, implying that the width of the Hbeta broad emission line depends on source inclination, at least for radio-loud quasars, in line with previous studies.

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