AAS 207th Meeting, 8-12 January 2006
Session 176 Radio - Loud AGN
Poster, Thursday, 9:20am-4:00pm, January 12, 2006, Exhibit Hall

Previous   |   Session 176   |   Next  |   Author Index   |   Block Schedule

[176.08] Multi-Frequency Polarization Images of Extreme Radio Sources

S. Burke, B. Partridge (Haverford College), J. Marr (Union College)

Extragalactic radio sources with extreme spectra (e.g., emission increasing with frequency above 10 GHz) are a potentially troublesome source of foreground noise in searches for temperature and polarization fluctuations in the cosmic microwave background. They are also intrinsically interesting: such sources are likely to be the youngest or most recently activated AGN.

Maps of linear polarization at milli-arscec (roughly parsec) scales reveal physical properties and morphologies of the sources. Our multi-frequency polarization images allow us to disentangle morphological effects from Faraday depolarization, and hence to determine magnetic field alignment and rotation measure. We report preliminary results from 4 extreme sources, showing both polarization and spectral index images based on VLBA observations at 8, 15 and 22 GHz.

Previous   |   Session 176   |   Next

Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.