The Host Galaxies of Three Radio-loud Quasars: 3C 48, 3C 345, and B2 1425+267
Abstract
Observations with the Wide-Field/Planetary Camera-2 of the Hubble Space Telescope are presented for three radio-loud quasars: 3C 48 (z=0.367), B2 1425+267 (z=0.366), and 3C 345 (z=0.594). All three quasars have luminous (~4×L*) galaxies as hosts, which are either elliptical (B2 1425+267 and 3C345) or interacting (3C 48), and all hosts are 0.5-1.0 mag bluer in V-I than other galaxies with the same overall morphology at redshifts similar to those of the quasars. The host of 3C 48 has many H II regions and a very extended tidal tail. All nine of the radio-loud quasars studied here and in a previous paper by Bahcall et al. either have bright elliptical hosts or occur in interacting systems. There is a robust correlation between the radio emission of the quasar and the luminosity of host galaxy; the radio-loud quasars reside in galaxies that are on average ~1 mag brighter than hosts of the radio-quiet quasars.
Based on observations with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1999
- DOI:
- 10.1086/307430
- arXiv:
- arXiv:astro-ph/9902175
- Bibcode:
- 1999ApJ...520...67K
- Keywords:
-
- GALAXIES: INTERACTIONS;
- GALAXIES: STRUCTURE;
- GALAXIES: QUASARS: GENERAL;
- RADIO CONTINUUM: GALAXIES;
- Galaxies: Interactions;
- Galaxies: Structure;
- Galaxies: Quasars: General;
- Radio Continuum: Galaxies;
- Astrophysics
- E-Print:
- Accepted for publication in ApJ. 3 postscript and 3 jpeg figures. Original figures may be found in ftp://eku.sns.ias.edu/pub/sofia/RadioLoud/