Ring-Like Structure in the Radio Lobe of MG0248+0641

Details Ring-Like Structure in the Radio Lobe of MG0248+0641 Ring-Like Structure in the Radio Lobe of MG0248+0641

1997-08-16

arxiv.org/abs/astro-ph/9708152v3

Astron.J. 115 (1998) 37

Astronomy and Astrophysics

Astrophysics

21 pages. Submitted to AJ Aug 15, 1997; Accepted Sep 30, 1997. Minor changes in content

Scientific paper

10.1086/300182

We present radio and optical observations of MG0248+0641, which contains a kiloparsec-scale ring-like structure in one of its radio lobes. The radio observations show a typical core-double morphology: a central core between two lobes, each of which has a hotspot. The western radio lobe appears as a nearly continuous ring, with linear polarization electric field vectors which are oriented in a radial direction from the ring center. We consider several different interpretations for the nature of this ring, including gravitational lensing of a normal jet by a foreground galaxy. Even though simple lensing models can describe the ring morphology reasonably well, the high linear polarization seen around the ring cannot be easily explained. The chance interposition of a galactic supernova remnant, nova, planetary nebula, or H II region, has been ruled out. The highly polarized ring of MG0248+0641 is much like the prominent ring seen in 3C219, and the multiple ones in 3C310 and Hercules A, suggesting that similar physical processes are producing shell structures in these radio galaxies. The ring in MG0248+0641 may be caused by the formation of ``bubbles'', as a result of instabilities in the energy flow down the western radio jet. It may also be possible that the required instabilities are triggered by the infall of gas, via tidal interaction of the central source with a nearby galaxy. This scenario may be indicated by our marginal detection of an optical source close to the western hotspot.

Affiliated with

Also associated with

No associations

Rating

Ring-Like Structure in the Radio Lobe of MG0248+0641 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 Ring-Like Structure in the Radio Lobe of MG0248+0641, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring-Like Structure in the Radio Lobe of MG0248+0641 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-630206