Circular polarization in PKS 1519-273
MetadataShow full item record
The intra-day variable BL Lac PKS 1519-273 exhibits variations at centimeter wavelengths in total intensity, linear polarization, and circular polarization. The variability is caused by scintillation due to the interstellar medium. PKS 1519-273 displays 4% circular polarization at 4.8 GHz and the variability has persisted as long as the source has been observed. We present observations of this source over several years, showing that the circularly polarized emission is highly variable on micro-arcsecond scales. We determine structural properties of the emission by examining the light curves and associated scintillation theory.
Showing items related by title, author, creator and subject.
Bennett, Wendy; Madland, Mark; Weinzirl, Timothy; Nelson, Charles H. (2007-06-01)Recent searches for massive black holes in galactic nuclei show that they are common if not ubiquitous. Furthermore, there are important relationships between black hole mass and properties characterizing the size and ...
Weinzirl, Timothy; Bennett, Wendy; Madland, Mark (2007-05-29)Seyfert galaxies, in which accretion onto a massive nuclear black hole acts as a powerful energy source, allegedly have bulges more luminous per unit mass than those in normal galaxies. We have tested this claim through ...
Nelson, Charles H.; Green, Richard; Bower, Gary; Gebhardt, Karl; Weistrop, Donna (2003)Bulge stellar velocity dispersions, sigma, in Seyfert 1 galaxies are combined with the M_bh -- sigma relation to validate reverberation mapping as a means of determining nuclear black hole masses. Seyfert galaxies follow ...