Host galaxies of intermediate redshift radio-loud and radio-quiet quasars
نویسندگان
چکیده
منابع مشابه
The Host Galaxies of Radio-loud and Radio-quiet Quasars
I review our knowledge of the properties of the host galaxies of radioloud and radio-quiet quasars, both in comparison to each other and in the context of the general galaxy population. It is now clear that the hosts of radio-loud and radio-quiet quasars with MV < −23.5 are virtually all massive elliptical galaxies. The masses of these spheroids are as expected given the relationship between bl...
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We present the results of a detailed analysis of the host galaxies of powerful AGN as revealed by deep near-infrared imaging. New K-band images have been obtained of a sample of radio galaxies (RGs) selected to match the radio-loud quasar (RLQ) and radio-quiet quasar (RQQ) samples for which comparable images were presented by Dunlop et al. (1993). The images of all three samples have been analy...
متن کاملRadio Variability of Radio Quiet and Radio Loud Quasars
The majority of quasars are weak in their radio emission, with flux densities comparable to those in the optical, and energies far lower. A small fraction, about 10%, are hundreds to thousands of times stronger in the radio. Conventional wisdom holds that there are two classes of quasars, the radio quiets and radio louds, with a deficit of sources having intermediate power. Are there really two
متن کاملHigh-Redshift, Radio-Loud Quasars
I discuss two programs to study radio-loud quasars at high (z ∼ > 4) redshift. Quasars are the most luminous, non-transient objects known and are observed to the earliest cosmic epochs. At lower redshifts, radio-loud quasars are associated with host galaxies having de Vaucoleurs profiles. By association, identifying and studying a sample of high-redshift, radio-loud quasars provides important c...
متن کاملThe Nature of Radio-Intermediate Quasars: What is Radio-Loud and what is Radio-Quiet?
We have performed quasi-simultaneous radio flux density measurements at 2.7 and 10 GHz for all PG quasars with radio flux densities between 4-200 mJy. We find that a large fraction of these sources are variable, flat-spectrum quasars. This brings the total fraction of flat-spectrum quasars with a ratio between radio and optical flux of R > 10 — a value previously used to define a radio-loud qua...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1996
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/283.1.282