Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...298...77c&link_type=abstract
Astronomy and Astrophysics, v.298, p.77
Astronomy and Astrophysics
Astrophysics
21
Galaxies: Structures, B2 0902 + 343, Ratio Continuum: Galaxies
Scientific paper
We present high resolution (0.15") radio continuum images of total and polarized intensity at 1.65GHz of the z=3.4 radio galaxy B2 0902 + 343. These images were made by combining data from the VLA and MERLIN. Also presented is a re-analysis of the images of this source made with the VLA at higher frequencies (Carilli et al. 1994). The new high resolution low frequency image reveals a long `plume' of emission extending well beyond the northern hot spot regions. This plume has an extremely steep spectrum (index<=-3.3), possibly indicating significant inverse Compton losses off the microwave background, as predicted for sources at very high redshift. High resolution spectral index images confirm that the southern-most knot in the jet has a flat spectrum (index=-0.03+/-0.02 between 1.65GHz and 8.3GHz), suggesting it as the active nucleus of the radio galaxy. The multifrequency polarized intensity images of B2 0902 + 343 verify the large rotation measures, and gradients in rotation measure, across the northern hot spot regions, indicative of a dense, magnetized local environment, comparable to what has been observed for lower redshift radio sources at the centers of cooling flow clusters. The high resolution 1.65GHz image confirms the ring morphology of the southern-most component of the source, as previously seen at 8.3GHz. A detailed comparison between the radio and optical images of B2 0902 + 343 (from Eisenhardt & Dickinson 1992) is presented, showing how the flat spectrum radio core source is situated in a `valley' between two optical peaks, and how the radio jet coincides closely with a `trough' between the eastern and western parts of the optical galaxy. We conclude that most of the peculiarities of the B2 0902 + 343 radio galaxy can be explained by assuming that the source is oriented at a substantial angle with respect to the sky plane, perhaps between 45deg and 60deg, with the northern regions of the source approaching. A requirement of this idea is that the central region of the galaxy be obscured by a substantial amount of dust.
No associations
LandOfFree
The bizarre structure of the z=3.4 radio galaxy B2 0902 + 343. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The bizarre structure of the z=3.4 radio galaxy B2 0902 + 343., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The bizarre structure of the z=3.4 radio galaxy B2 0902 + 343. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200903