Optical Polarization Variability of the M87 Jet; An In-Depth Look at the HST-1 Component

Details Optical Polarization Variability of the M87 Jet; An In-Depth Look at the HST-1 Component Optical Polarization Variability of the M87 Jet; An In-Depth Look at the HST-1 Component

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jsara...4...45b&link_type=abstract

Journal of the Southeastern Association for Research in Astronomy, vol. 4, p. 45-51

Astronomy and Astrophysics

Astronomy

1

Galaxies: Individual: M87, Galaxies: Active, Galaxies: Jets, Nuclei

Scientific paper

We present HST V band polarimetry observations of the M87 jet, ranging from 1995 to 2007 with greater sampling occurring during the 2005 flux outburst of innerknot HST-1. Our objective was the measure the fractional polarization of light emitted from the knot regions of the jet to check for variability. Our results showed that there was significant polarization variability in the core and the HST-1 knot. However, the magnetic field position angle of the core showed drastic changes whereas the PA of HST-1 was mostly constant. Large Polarization variability in the jet suggests a changing magnetic field that could indicate that jet dynamics or the addition of particles play a role in the giant 2005 flare of HST-1.

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