Professor Rob Fender: Publications

An artist's impression of a relativistic jet propagating away from a black hole at close to the speed of light. Such jets are formed by the inner regions of the accretion flow: matter flowing inwards towards the black hole, via processes which are not yet fully understood. The accretion flow emits primarily in X-rays, the relativistic jet in the radio band: by combing observations in each band we can try and understand how such jets form and how much energy they carry away from the black hole.

Extreme Jet Ejections from the Black Hole X-ray Binary V404 Cygni

(2017)

Authors:

AJ Tetarenko, GR Sivakoff, JCA Miller-Jones, EW Rosolowsky, G Petitpas, M Gurwell, J Wouterloot, R Fender, S Heinz, D Maitra, SB Markoff, S Migliari, MP Rupen, AP Rushton, DM Russell, TD Russell, CL Sarazin

Resolved, expanding jets in the Galactic black hole candidate XTE J1908+094

(2017)

Authors:

AP Rushton, JCA Miller-Jones, PA Curran, GR Sivakoff, MP Rupen, Z Paragi, RE Spencer, J Yang, D Altamirano, T Belloni, RP Fender, HA Krimm, D Maitra, S Migliari, DM Russell, TD Russell, R Soria, V Tudose

iPTF16fnl: a faint and fast tidal disruption event in an E+A galaxy

(2017)

Authors:

N Blagorodnova, S Gezari, T Hung, SR Kulkarni, SB Cenko, DR Pasham, L Yan, I Arcavi, S Ben-Ami, BD Bue, T Cantwell, Y Cao, AJ Castro-Tirado, R Fender, C Fremling, A Gal-Yam, AYQ Ho, A Horesh, G Hosseinzadeh, MM Kasliwal, AKH Kong, RR Laher, G Leloudas, R Lunnan, FJ Masci, K Mooley, JD Neill, P Nugent, M Powell, AF Valeev, PM Vreeswijk, R Walters, P Wozniak

Measuring the expansion velocity of the outflows of LS I +61 303 through low-frequency radio observations

AIP Conference Proceedings AIP Publishing 1792:1 (2017) 040018

Authors:

B Marcote, M Ribó, JM Paredes, CH Ishwara-Chandra, JD Swinbank, JW Broderick, S Markoff, R Fender, RAMJ Wijers, GG Pooley, AJ Stewart, ME Bell, RP Breton, D Carbone, S Corbel, J Eislöffel, H Falcke, J-M Grießmeier, M Kuniyoshi, M Pietka, A Rowlinson, M Serylak, AJ van der Horst, J van Leeuwen, MW Wise, P Zarka

Rapid radio flaring during an anomalous outburst of SS Cyg

Monthly Notices of the Royal Astronomical Society: Letters 91̽�� University Press 467:1 (2017) L31-L35

Authors:

Kunal P Mooley, James CA Miller-Jones, Robert Fender, Gregory R Sivakoff, Clare Rumsey, Yvette Perrott, David Titterington, Keith Grainge, Thomas D Russell, Steven H Carey, Jack Hickish, Nima Razavi-Ghods, Anna Scaife, Paul Scott, Elisabeth O Waagen

Abstract:

The connection between accretion and jet production in accreting white dwarf binary systems, especially dwarf novae, is not well understood. Radio wavelengths provide key insights into the mechanisms responsible for accelerating electrons, including jets and outflows. Here we present densely-sampled radio coverage, obtained with the Arcminute MicroKelvin Imager Large Array, of the dwarf nova SS Cyg during its February 2016 anomalous outburst. The outburst displayed a slower rise (3 days mag^-1) in the optical than typical ones, and lasted for more than 3 weeks. Rapid radio flaring on timescales <1 hour was seen throughout the outburst. The most intriguing behavior in the radio was towards the end of the outburst where a fast, luminous (“giant”), flare peaking at ~20 mJy and lasting for 15 minutes was observed. This is the first time that such a flare has been observed in SS Cyg, and insufficient coverage could explain its non-detection in previous outbursts. These data, together with past radio observations, are consistent with synchrotron emission from plasma ejection events as being the origin of the radio flares. However, the production of the giant flare during the declining accretion rate phase remains unexplained within the standard accretion-jet framework and appears to be markedly different to similar patterns of behavior in X-ray binaries.

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