منابع مشابه
Radio Detection of Radio-quiet Galaxies
We investigate the radio emission of ∼ 185,000 quiescent (optically unclassifiable) galaxies selected from the Sloan Digital Sky Survey (SDSS). By median-stacking FIRST cutouts centered on the optically-selected sources, we are able to reach flux densities down to the 10s of μJy. The quiescent galaxy sample is composed of two subgroups inhabiting vastly different regimes: those targeted for the...
متن کاملThe 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...
متن کاملThe Difference between Radio-loud and Radio-quiet Active Galaxies
The recent development of unified theories of active galactic nuclei (AGN) has indicated that there are two physically distinct classes of these objects radio-loud and radio-quiet. The primary observational distinctions between the two types are: (1) The radio-loud objects produce large scale radio jets and lobes, with the kinetic power of the jets being a significant fraction of the total bolo...
متن کاملA Near{ir Study of the Host Galaxies of Radio-quiet Quasars, Radio-loud Quasars and Radio Galaxies
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 کاملThe radio properties of radio-quiet quasars
Although radio-quiet quasars (RQQs) constitute > ∼ 90% of optically-identified quasar samples their radio properties are only poorly understood. In this paper we present the results of a multi-frequency VLA study of 27 low-redshift RQQs. We detect radio emission from 20 objects, half of which are unresolved (≤ 0.24). In cases where significant structure can be resolved, double, triple and linea...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2008
ISSN: 0004-6256,1538-3881
DOI: 10.1088/0004-6256/136/3/1097