Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Multifrequency polarization properties of blazars

Jorstad, S., Marscher, A., Stevens, J., Smith, P., Forster, J., Lister, M., Stirling, A., Gómez, J., Cawthorne, T., Gear, Walter Kieran and Robson, I. 2006. Multifrequency polarization properties of blazars. Chinese Journal of Astronomy and Astrophysics 6 (S1) , pp. 247-252. 10.1088/1009-9271/6/S1/31

Full text not available from this repository.

Abstract

We report preliminary results of a 3-year multifrequency polarization campaign of 15 AGNs of blazar type, including bimonthly total and polarized intensity imaging at 7 mm with the VLBA. We find that the sources have two different dependences of degree of polarization on wavelength: sub-mm peaked or straight ``polarization spectra''. The fractional polarization of the latter group increases with frequency. All sources with sub-mm peak polarization (6 objects) have similar degree of polarization in the optical region and in the VLBA core. In high-optically polarized sources (5 objects) the EVPAs at all frequencies align with the pc-scale jet direction within the 1σ uncertainties. This implies that the high frequency emission is co-spatial with the VLBI core and/or transverse shocks in the jet.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Institute of Physics Science
ISSN: 1009-9271
Last Modified: 04 Jun 2017 04:16
URI: http://orca.cf.ac.uk/id/eprint/35822

Citation Data

Cited 2 times in Google Scholar. View in Google Scholar

Actions (repository staff only)

Edit Item Edit Item