Amplification of perpendicular and parallel magnetic fields by cosmic ray currents
(2017)
Evidence that particle acceleration in hotspots of FR II galaxies is not constrained by synchrotron cooling
(2017)
Deep 230-470 MHz VLA Observations of the mini-halo in the Perseus Cluster
(2017)
Fast launch speeds in radio flares, from a new determination of the intrinsic motions of SS 433's jet bolides
Monthly Notices of the Royal Astronomical Society Oxford University Press 461:1 (2016) 312-320
Abstract:
We present new high-resolution, multi-epoch, VLBA radio images of the Galactic microquasar SS 433. We are able to observe plasma knots in the milliarcsecond-scale jets more than 50 days after their launch. This unprecedented baseline in time allows us to determine the bulk launch speed of the radio-emitting plasma during a radio flare, using a new method which we present here, and which is completely independent of optical spectroscopy. We also apply this method to an earlier sequence of 39 short daily VLBA observations, which cover a period in which SS 433 moved from quiescence into a flare. In both datasets we find, for the first time at radio wavebands, clear evidence that the launch speeds of the milliarcsecondscale jets rise as high as 0.32c during flaring episodes. By comparing these images of SS 433 with photometric radio monitoring from the RATAN telescope, we explore further properties of these radio flares.Fast launch speeds in radio flares, from a new determination of the intrinsic motions of SS 433's jet bolides
(2016)