Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-16
Astron.Astrophys.447:63-70,2006
Astronomy and Astrophysics
Astrophysics
17 pages, 6 figures, matches the version printed in Astronomy & Astrophysics
Scientific paper
10.1051/0004-6361:20053996
The so-called HYbrid MOrphology Radio Sources (HYMORS) are a class of objects that appear to have a mixed Fanaroff-Riley (FR) morphology in a single object; i.e. a HYMORS has an FR I-type lobe on one side of its nucleus and an FR II-type lobe on the other side. Because of this unique feature and given that the origin of the FR morphological dichotomy is still unclear, HYMORS may possibly play a crucial role in our understanding of the FR-dichotomy. As the number of known HYMORS is quite small, we aimed to increase that number by inspecting a few areas of the sky covered by the VLA FIRST survey and by selecting 21 HYMORS candidates based on the morphology shown in the FIRST images. They were observed with the VLA in B-conf. at 4.9 GHz. Three objects from the initial sample turned out to be actual HYMORS and two others very likely to fulfill the criteria. These five were subsequently re-observed with the VLA in A-conf. at 1.4 GHz. Our results provide strong support to the findings of Gopal-Krishna & Wiita (2000), namely that there are two different kinds of jets in HYMORS; consequently, the existence of FR-dichotomy as a whole is difficult to reconcile with the class of explanations that posit fundamental differences in the central engine.
Gawronski Marcin P.
Kunert-Bajraszewska Magdalena
Kus Andrzej J.
Marecki Andrzej
No associations
LandOfFree
Hybrid morphology radio sources from FIRST survey 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 Hybrid morphology radio sources from FIRST survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid morphology radio sources from FIRST survey will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-553708