NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-23 T11:29:54 PDT
Help | Comment | NED Home

For refcode 2000A&A...363..141R:
Retrieve 747 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2000A&A...363..141R Radio-loud active galaxies in the northern ROSAT All-Sky Survey. IV. Properties of sources stronger than 100 mJy at 5 GHz. REICH W., FUERST E., REICH P., KOTHES R., BRINKMANN W., SIEBERT J. Received 8 February 2000/Accepted 8 August 2000 Abstract: We present multi-frequency radio data for 741 extragalactic sources with a 5GHz integrated flux density of >100mJy. These sources have been selected from a cross-correlation of an early ROSAT All-Sky Survey source list with a list of compact radio sources of the 5GHz Green Bank northern sky survey (RGB sample). The majority of sources were quasi- simultaneously observed with the Effelsberg 100-m telescope at 11cm, 6cm, and 2.8cm. We have determined the spectrum, size and linear polarization properties of these sources. We compare the radio data with ROSAT measurements and optical data. We find that the X-ray selected radio sources, when compared with unbiased radio source samples, are on average slightly more compact, show a higher fractional polarization, a higher absolute rotation measure (RM), and have flatter spectra. Absolute RMs are larger for steep spectrum than for flat spectrum sources and for extended than for compact sources. The average redshift increases with the radio flux density, which indicates that the X-ray selected radio sources have a larger fraction of beamed radio emission. All source characteristics of the sample are in accordance with present unification schemes for AGN, where X- ray selected sources are preferable looked at face on. Key words: polarization - galaxies: active - quasars: general - radio continuum: general - X-rays: general
Retrieve 747 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home