8-12 juin, 2014

Résumé

A New Perspective on Relativistic Jets in Galactic Black Hole X-ray Binaries: Bridging the Gap Between Radio and IR Regimes

Alex Tetarenko (University of Alberta)

G.R. Sivakoff (University of Alberta), J.C.A. Miller-Jones (Curtin Univeristy- ICRAR), P.A. Curran (Curtin Univeristy- ICRAR), T.D. Russell (Curtin Univeristy- ICRAR) and the JACPOT XRB Team (http://www.astro.virginia.edu/xrb_jets)

Accreting astrophysical sources are one of the important end-results of intricate stellar dynamics. A particularly puzzling aspect of this accretion process is the production and evolution of plasma outflows (or jets). Although astrophysical jets have been studied for decades in accreting sources, the underlying physics that governs jet behaviour is still poorly understood. Since black hole X-ray binary (BHXRB) systems evolve on short timescales, the steady, compact relativistic plasma jet that is present at the onset of a BHXRB outburst serves as an important probe of jet physics and analogue for the universal process of jet production in other astrophysical systems. The detailed properties of BHXRB jets are encoded in the broad-band spectral energy distribution (SED). However, we could only recently begin to fill in a large void in our broad-band coverage, the sub-mm/mm regime. We discuss surprising results obtained from the 2012 outburst of the new transient BHXRB, Swift J1745-26; the first-ever measured sub-mm/mm spectral index from a relativistic BHXRB jet explains their shockingly high brightness in the sub-mm/mm regime. We explore the implications this result may have on our understanding of the jet spectrum in BHXRBs, and thus the inner workings of these jets.
(doit être confirmé par le SOC)