Multi-epoch VLB Polarimetry of BL Lac

Details Multi-epoch VLB Polarimetry of BL Lac Multi-epoch VLB Polarimetry of BL Lac

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.2301d&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #23.01; Bulletin of the American Astronomical Society, Vol. 28, p.854

Astronomy and Astrophysics

Astronomy

Scientific paper

We present VLBA polarization maps of the radio core of BL Lac at 15 and 22 GHz at five epochs between 1995.4-1996.2. The maps show the ejection of a highly polarized ( ~ 25%) superluminal component (v/c ~ 2.5+/-1.4, H=100) starting in mid-1995. The new component is coeval with a large flux outburst. There is a 0.1-0.3 mas difference in core-knot separation between 15 and 22 GHz. The [putative] core component is only weakly polarized. An extended stationary tail extending SW is detected at all epochs. The tail has a remarkably high fractional polarization with a p.a. ~ 90deg rotated with respect to the superluminal knot polarization.

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