Multi-wavelength Polarimetry and Variability Study of M87 Jet
  We present a high resolution polarimetry and variability study of the M87 jet using VLA and HST data taken during 2002 to 2008. Both data-sets have an angular resolution as high as 0.06$"$, which is 2-3 times better than previous observations. New morphological details are revealed in both the optical and radio, which can help to reveal the energetic and magnetic field structure of the jet. By comparing the data with previously published HST and VLA observations, we show that the jet$'$s morphology in total and polarized light is changing significantly on timescales of $\sim$a decade. We compare the evolution of the inner jet (particularly the nucleus and knot HST-1), when our observations overlap with the multi-wavelength monitoring campaigns conducted with HST and Chandra. We use these data to comment on particle acceleration and main emission processes. 
Sayali S Avachat, Eric S Perlman, William B Sparks, Mihai Cara, Frazer   N Owen
astro-ph.HE