High-resolution observations of eight 3CR compact steep-spectrum radio sources

Details High-resolution observations of eight 3CR compact steep-spectrum radio sources High-resolution observations of eight 3CR compact steep-spectrum radio sources

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..225s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 1, 1991, p. 225-240.

Astronomy and Astrophysics

Astronomy

84

Extragalactic Radio Sources, Radio Astronomy, Radio Jets (Astronomy), Astronomical Maps, High Resolution, Radio Spectra, Sky Surveys (Astronomy), Very Large Array (Vla), Very Long Base Interferometry

Scientific paper

High-resolution observations carried out at 18-cm wavelength with MERLIN and the European VLBI Network (EVN) on eight compact steep-spectrum (CSS) sources from the 3CR catalog (3C43, 186, 190, 286, 299, 318, 346, 454) are presented. The typical resolution achieved on maps made with combined data is equal to or less than 30 mas. The relationships between compact features on these maps with low-brightness extended regions seen in the MERLIN data alone can be found. Prominent jets were found in seven sources, making it possible to discuss the properties of jets for the 3CR sample of CSS sources in general. The jet opening angle is similar to that in large-scale powerful radio sources, but several jets show pronounced curvature and bending perhaps indicative of strong interactions with an interstellar medium. The jet/counter-jet brightness ratios are consistent with moderate (beta is equal to or greater than 0.7) Doppler boosting.

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