Constraining the spectral age of very asymmetric CSOs

Details Constraining the spectral age of very asymmetric CSOs Constraining the spectral age of very asymmetric CSOs

2006-10-12

arxiv.org/abs/astro-ph/0610359v1

Astronomy and Astrophysics

Astrophysics

8 pages, 1 figure; accepted for pubblication in A&A

Scientific paper

10.1051/0004-6361:20066122

We constrain the spectral ages for two very asymmetric Compact Symmetric Objects (CSO) from the B3-VLA-CSS sample, and we investigate the role of the ambient medium potentially able to influence the individual source evolution. Multi-frequency VLBA observations have been carried out to study the distribution of the break frequency of the spectra across different regions of each source. From the analysis of synchrotron spectra and assuming an equipartition magnetic field, we find radiative ages of about 2x10^3 and 10^4 years for B0147+400 and B0840+424, respectively. The derived individual hot-spot advance speed is in the range between 0.03c and 0.3c, in agreement with kinematic studies carried out on other CSOs. The very asymmetric morphology found in both sources is likely related to an inhomogeneous ambient medium in which the sources are growing, rather than to different intrinsic hot-spot pressures on the two sides.

Affiliated with

Also associated with

No associations

Rating

Constraining the spectral age of very asymmetric CSOs 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 Constraining the spectral age of very asymmetric CSOs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the spectral age of very asymmetric CSOs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-442486