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Relativistic Jet from Black Hole

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.

Professor Rob Fender

Professor of Astrophysics

Research theme

  • Astronomy and astrophysics

Sub department

  • Astrophysics

Research groups

  • Hintze Centre for Astrophysical Surveys
  • MeerKAT
  • Pulsars, transients and relativistic astrophysics
  • Rubin-LSST
  • The Square Kilometre Array (SKA)
  • Gamma-ray astronomy
Rob.Fender@physics.ox.ac.uk
Telephone: 01865 (2)73435
Denys Wilkinson Building, room 712
  • About
  • Publications

Observing pulsars and fast transients with LOFAR

Astronomy and Astrophysics 530 (2011)

Authors:

BW Stappers, JWT Hessels, A Alexov, K Anderson, T Coenen, T Hassall, A Karastergiou, VI Kondratiev, M Kramer, J Van Leeuwen, JD Mol, A Noutsos, JW Romein, P Weltevrede, R Fender, RAMJ Wijers, L Bähren, ME Bell, J Broderick, EJ Daw, VS Dhillon, J Eislöffel, H Falcke, J Griessmeier, C Law, S Markoff, JCA Miller-Jones, B Scheers, H Spreeuw, J Swinbank, S Ter Veen, MW Wise, O Wucknitz, P Zarka, J Anderson, A Asgekar, IM Avruch, R Beck, P Bennema, MJ Bentum, P Best, J Bregman, M Brentjens, RH Van De Brink, PC Broekema, WN Brouw, M Brüggen, AG De Bruyn, HR Butcher, B Ciardi, J Conway, RJ Dettmar, A Van Duin, J Van Enst, M Garrett, M Gerbers, T Grit, A Gunst, MP Van Haarlem, JP Hamaker, G Heald, M Hoeft, H Holties, A Horneffer, LVE Koopmans, G Kuper, M Loose, P Maat, D McKay-Bukowski, JP McKean, G Miley, R Morganti, R Nijboer, JE Noordam, M Norden, H Olofsson, M Pandey-Pommier, A Polatidis, W Reich, H Röttgering, A Schoenmakers, J Sluman, O Smirnov, M Steinmetz, CGM Sterks, M Tagger, Y Tang, R Vermeulen, N Vermaas, C Vogt, M De Vos, SJ Wijnholds, S Yatawatta, A Zensus

Abstract:

Low frequency radio waves, while challenging to observe, are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric "radio window": 10-240 MHz, that will greatly facilitate observing pulsars at low radio frequencies. Through the huge collecting area, long baselines, and flexible digital hardware, it is expected that LOFAR will revolutionize radio astronomy at the lowest frequencies visible from Earth. LOFAR is a next-generation radio telescope and a pathfinder to the Square Kilometre Array (SKA), in that it incorporates advanced multi-beaming techniques between thousands of individual elements. We discuss the motivation for low-frequency pulsar observations in general and the potential of LOFAR in addressing these science goals. We present LOFAR as it is designed to perform high-time-resolution observations of pulsars and other fast transients, and outline the various relevant observing modes and data reduction pipelines that are already or will soon be implemented to facilitate these observations. A number of results obtained from commissioning observations are presented to demonstrate the exciting potential of the telescope. This paper outlines the case for low frequency pulsar observations and is also intended to serve as a reference for upcoming pulsar/fast transient science papers with LOFAR. © 2011 ESO.
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Rapid variations of polarization in low-mass X-ray binaries

Sissa Medialab Srl (2011) 009

Authors:

David M Russell, Piergiorgio Casella, Rob Fender, Paolo Soleri, Magaretha PRETORIUS, Fraser Lewis, M van der Klis
More details from the publisher

Observing pulsars and fast transients with LOFAR

(2011)

Authors:

BW Stappers, JWT Hessels, A Alexov, K Anderson, T Coenen, T Hassall, A Karastergiou, VI Kondratiev, M Kramer, J van Leeuwen, JD Mol, A Noutsos, JW Romein, P Weltevrede, R Fender, RAMJ Wijers, L Bähren, ME Bell, J Broderick, EJ Daw, VS Dhillon, J Eislöffel, H Falcke, J Griessmeier, C Law, S Markoff, JCA Miller-Jones, B Scheers, H Spreeuw, J Swinbank, S ter Veen, MW Wise, O Wucknitz, P Zarka, J Anderson, A Asgekar, IM Avruch, R Beck, P Bennema, MJ Bentum, P Best, J Bregman, M Brentjens, RH van de Brink, PC Broekema, WN Brouw, M Brüggen, AG de Bruyn, HR Butcher, B Ciardi, J Conway, R-J Dettmar, A van Duin, J van Enst, M Garrett, M Gerbers, T Grit, A Gunst, MP van Haarlem, JP Hamaker, G Heald, M Hoeft, H Holties, A Horneffer, LVE Koopmans, G Kuper, M Loose, P Maat, D McKay-Bukowski, JP McKean, G Miley, R Morganti, R Nijboer, JE Noordam, M Norden, H Olofsson, M Pandey-Pommier, A Polatidis, W Reich, H Röttgering, A Schoenmakers, J Sluman, O Smirnov, M Steinmetz, CGM Sterks, M Tagger, Y Tang, R Vermeulen, N Vermaas, C Vogt, M de Vos, SJ Wijnholds, S Yatawatta, A Zensus
More details from the publisher

Rapid variations of polarization in low-mass X-ray binaries

(2011)

Authors:

David M Russell, Piergiorgio Casella, Rob Fender, Paolo Soleri, Magaretha L Pretorius, Fraser Lewis, Michiel van der Klis
More details from the publisher

e-VLBI observations of Circinus X-1: monitoring of the quiescent and flaring radio emission on AU scales

(2011)

Authors:

A Moin, C Reynolds, JCA Miller-Jones, SJ TIngay, CJ Phillips, AK Tzioumis, GD Nicolson, RP Fender
More details from the publisher

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