Combined-array images of an archetypal compact steep-spectrum source, 3C147
نویسندگان
چکیده
منابع مشابه
New candidate GHz Peaked Spectrum and Compact Steep Spectrum Sources
Data from a recent Australia Telescope Compact Array (ATCA) program of multi-frequency, multi-epoch monitoring of 202 active galactic nuclei with declinations < +10 • have been searched for GHz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources. Supplementary data at higher and lower frequencies, where available, have been used to further examine the spectral properties of pre...
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Compact Steep Spectrum (CSS) and Gigahertz Peaked Spectrum (GPS) sources are classes of compact, powerful, extragalactic objects. These sources are thought to be the earliest stages in the evolution of radio galaxies, capturing the ignition (or, in some cases, re-ignition) of the AGN. As well as serving as probes of the early stages of large-scale radio sources, these sources are good, stable, ...
متن کاملAstronomy and Astrophysics Superluminal Motion in a Compact Steep Spectrum Radio Source 3c 138
We present the results of 5 GHz VLBI observations of a compact steep spectrum source 3C 138. The data are consistent with the western end being the location of the central activity. The observed offset between different frequencies in the central region of 3C 138 can be accounted for by a frequency dependent shift of the synchrotron self-absorbed core. Our new measurements confirm the existence...
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We have obtained near-infrared spectroscopy of a small sample of powerful Compact Steep-Spectrum (CSS) radio sources mainly, but not exclusively, from the 3CR sample. We find no differences between the distributions in the equivalent width and luminosity of the [Oiii]5007 line for our sample and other larger, presumably older, high-redshift 3C objects, suggesting that the underlying quasar lumi...
متن کاملSynchrotron Spectra and Ages of Compact Steep Spectrum Radio Sources
The high-frequency integrated spectra of Compact Steep Spectrum (CSS) sources show breaks with a moderate spectral steepening well fitted by continuous injection synchrotron spectra. In lobe-dominated CSS sources the radiative ages deduced by the synchrotron theory are in the range of up to 10 years, if equipartition magnetic fields are assumed. These radiative ages are well correlated with the...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1991
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/250.3.650