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Multi-frequency polarization properties of Blazars

Jorstad, S. G., Marscher, A. P., Stevens, J. A., Robson, E. I., Lister, J. L., Stirling, A. M., Smith, P. S., Cawthorne, T. V., Gomez, J. L., Gabuzda, D. C. and Gear, Walter Kieran 2005. Multi-frequency polarization properties of Blazars. Presented at: Astronomical Polarimetry: Current Status and Future Directions, Waikoloa, HI, USA, 15-19 March 2004. Published in: Adamson, Andy, Aspin, Colin, Davis, Chris J. and Fujiyoshi, Takuya eds. Astronomical Polarimetry: Current Status and Future Directions. ASP Conference Series , vol. 343. San Francisco, CA: Astronomical Society of the Pacific, pp. 469-473.

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Abstract

We have obtained total and polarized intensity images of 15 AGNs with the VLBA at 7 mm at 17 epochs, accompanied at many epochs by nearly simultaneous measurements of polarization at 1.35/0.85 mm and at optical wavelengths. Analysis of the data shows an obvious connection between the polarized emission at high frequencies and the most strongly polarized features in parsec-scale jets. The largest deviations between polarization parameters at different frequencies are detected when a new compact knot emerges from the core, and are likely caused by very short time-scale (<1 week) polarization variability during the events.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: Q Science > QB Astronomy
Additional Information: Proceedings of conference held at Waikoloa, Island of Hawaii, Hawaii, USA 15-19 March 2004
Publisher: Astronomical Society of the Pacific
ISBN: 1583812105
Related URLs:
Last Modified: 04 Jun 2017 04:18
URI: http://orca-mwe.cf.ac.uk/id/eprint/36550

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