Pulsars, transients and relativistic astrophysics

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Jet-dominated advective systems of all mass scales

(2006)

Authors:

Elmar Koerding, Rob Fender

A link between radio loudness and X-ray/optical properties of AGN

(2006)

Authors:

Sebastian Jester, Elmar Koerding, Rob Fender

The VLBA Imaging and Polarimetry Survey at 5 GHz

(2006)

Authors:

JF Helmboldt, GB Taylor, S Tremblay, CD Fassnacht, RC Walker, ST Myers, LO Sjouwerman, TJ Pearson, ACS Readhead, L Weintraub, N Gehrels, RW Romani, S Healey, PF Michelson, RG Blandford, G Cotter

The LOFAR Transients Key Project

(2006)

Authors:

Rob Fender, Robert Braun, Ben Stappers, Ralph Wijers, Michael Wise, Thijs Coenen, Heino Falcke, Jean-Mathias Griessmeier, Michiel van Haarlem, Peter Jonker, Casey Law, Sera Markoff, Joseph Masters, James Miller-Jones, Rachel Osten, Bart Scheers, Hanno Spreeuw, John Swinbank, Corina Vogt, Rudy Wijnands, Philippe Zarka

Clues from microquasars to the origin of radio-loudness of quasars

ArXiv astro-ph/0611166 (2006)

Authors:

Carlo Nipoti, Katherine M Blundell, James Binney

Abstract:

We analysed the long-term variability of four microquasars (GRS 1915+105, Cyg X-1, Cyg X-3, and Sco X-1) in radio and X rays. The results of our analysis indicate the existence of two distinct modes of energy output, which we refer to as the `coupled' mode and the `flaring' mode. The coupled mode is responsible for mildly fluctuating, flat-spectrum radio emission, coupled with the X-ray emission; the flaring mode produces powerful, steep-spectrum radio flares, with no significant counterpart in X rays. We find that the fraction of time spent by a typical microquasar in the flaring mode is similar to the fraction of quasars that are radio-loud. This is consistent with the hypothesis that radio-loudness of quasars is a function of the epoch at which the source is observed.