Multi-Frequency, Multi-Epoch VLBA Polarization Observations of Mrk501

Details Multi-Frequency, Multi-Epoch VLBA Polarization Observations of Mrk501 Multi-Frequency, Multi-Epoch VLBA Polarization Observations of Mrk501

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..340..177c&link_type=abstract

Future Directions in High Resolution Astronomy: The 10th Anniversary of the VLBA, ASP Conference Proceedings, Vol. 340. Edited

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have analyzed 1+2+4+6 cm VLBA polarization data for the TeV BL Lac object Mrk501 obtained at three epochs separated by 3-4 weeks in March-April, 1998. These observations show no significant total-intensity or polarization variability over the interval covered by the observations, supporting previous claims that variability in the parsec-scale structure of this source (e.g. motions in its VLBI jet) is modest. The B field structure is complex, and shows a sheath-like structure. The rotation-measure distribution shows evidence for variations across the jet, suggesting the presence of a helical B field associated with the VLBI jet.

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