| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Polarization Limits in Compact Symmetric Objects | A.B. Peck
; G.B. Taylor
; | Date: |
22 Sep 2000 | Subject: | astro-ph | Affiliation: | MPIfR) and G.B. Taylor (NRAO | Abstract: | We present results of multifrequency polarimetric VLBA observations of 34 compact radio sources. The observations are part of a large survey undertaken to identify CSOs Observed in the Northern Sky (COINS). Based on VLBI continuum surveys of ~2000 compact radio sources, we have defined a sample of 52 CSOs and CSO candidates. Positive identification of CSOs is contingent upon acquiring multi-frequency observations in order to correctly identify the core of the source, which is expected to have a strongly inverted spectrum. We also expect CSOs to exhibit very little polarized flux. Despite the fact that synchrotron emission is intrinsically highly polarized, less than 0.5% fractional polarization is seen in low resolution studies of CSOs at frequencies up to 5 GHz. One possible explanation for the low observed linear polarization from CSOs is that their radiation is depolarized as it passes through a magnetized plasma associated with a circumnuclear torus. This interpretation is consistent with the unified scheme of AGN, and also with the recent detections of free-free and HI absorption in CSOs. Here we present limits on the polarized flux density at 8.4 GHz and ~1 mas resolution for 21 CSOs and candidates in the COINS sample. | Source: | arXiv, astro-ph/0009372 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |