On Compact Steep Spectrum Sources and Jet Production
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...
متن کاملHST / STIS low dispersion spectroscopy of three Compact Steep Spectrum sources Evidence for jet - cloud interaction
We present Hubble Space Telescope Imaging Spectrograph long-slit spectroscopy of the emission line nebulae in the compact steep spectrum radio sources 3C 67, 3C 277.1, and 3C 303.1. We derive BPT (Baldwin-Philips-Terlevich; Baldwin et al. 1981) diagnostic emission line ratios for the nebulae which are consistent with a mix of shock excitation and photo-ionization in the extended gas. In additio...
متن کاملCompact steep-spectrum sources and the unified scheme.
The compact steep-spectrum sources (CSSs) are an interesting class of objects which are of subgalactic dimensions; they occur more frequently in high-frequency surveys because their spectra often turn over at lower frequencies. We have estimated the symmetry parameters of a well-defined sample of CSSs and compared these with the larger 3CR sources of similar luminosity to understand the evoluti...
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...
متن کاملNear-infrared spectroscopy of powerful compact steep-spectrum radio sources
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...
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ژورنال
عنوان ژورنال: American Journal of Astronomy and Astrophysics
سال: 2015
ISSN: 2376-4678
DOI: 10.11648/j.ajaa.20150301.11