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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

The first tidal disruption flare in ZTF: from photometric selection to multi-wavelength characterization

(2018)

Authors:

Sjoert van Velzen, Suvi Gezari, S Bradley Cenko, Erin Kara, James C Miller-Jones, Tiara Hung, Joe Bright, Nathaniel Roth, Nadejda Blagorodnova, Daniela Huppenkothen, Lin Yan, Eran Ofek, Jesper Sollerman, Sara Frederick, Charlotte Ward, Matthew J Graham, Rob Fender, Mansi M Kasliwal, Chris Canella, Robert Stein, Matteo Giomi, Valery Brinnel, Jakob Santen, Jakob Nordin, Eric C Bellm, Richard Dekany, Christoffer Fremling, V Zach Golkhou, Thomas Kupfer, Shrinivas R Kulkarni, Russ R Laher, Ashish Mahabal, Frank J Masci, Adam A Miller, James D Neill, Reed Riddle, Mickael Rigault, Ben Rusholme, Maayane T Soumagnac, Yutaro Tachibana
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Identifying transient and variable sources in radio images

(2018)

Authors:

Antonia Rowlinson, Adam J Stewart, Jess W Broderick, John D Swinbank, Ralph AMJ Wijers, Dario Carbone, Yvette Cendes, Rob Fender, Alexander van der Horst, Gijs Molenaar, Bart Scheers, Tim Staley, Sean Farrell, Jean-Mathias Grießmeier, Martin Bell, Jochen Eislöffel, Casey J Law, Joeri van Leeuwen, Philippe Zarka
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SPIRITS 16tn in NGC 3556: A Heavily Obscured and Low-luminosity Supernova at 8.8 Mpc

The Astrophysical Journal American Astronomical Society 863:1 (2018) 20

Authors:

Jacob E Jencson, Mansi M Kasliwal, Scott M Adams, Howard E Bond, Ryan M Lau, Joel Johansson, Assaf Horesh, Kunal P Mooley, Robert Fender, Kishalay De, Dónal O’Sullivan, Frank J Masci, Ann Marie Cody, Nadia Blagorodnova, Ori D Fox, Robert D Gehrz, Peter A Milne, Daniel A Perley, Nathan Smith, Schuyler D Van Dyk

Abstract:

We present the discovery by the SPitzer InfraRed Intensive Transients Survey (SPIRITS) of a likely supernova (SN) in NGC 3556 (M108) at only 8.8 Mpc that was not detected by optical searches. A luminous infrared (IR) transient at M[4.5] = −16.7 mag (Vega), SPIRITS 16tn is coincident with a dust lane in the inclined, star-forming disk of the host. Using observations in the IR, optical, and radio, we attempt to determine the nature of this event. We estimate AV ≈ 8–9 mag of extinction, placing it among the three most highly obscured IR-discovered SNe. The [4.5] light curve declined at a rate of 0.013 mag day−1, and the [3.6]–[4.5] color increased from 0.7 to ≳1.0 mag by 184.7 days post discovery. Optical/IR spectroscopy shows a red continuum but no clearly discernible features, preventing a definitive spectroscopic classification. Radio observations constrain the radio luminosity of SPIRITS 16tn to Lν ≲ 1024 erg s−1 Hz−1 between 3 and 15 GHz, excluding many varieties of core-collapse SNe. An SN Ia is ruled out by the observed IR color and lack of spectroscopic features from Fe-peak elements. SPIRITS 16tn was fainter at [4.5] than typical stripped-envelope SNe by ≈1 mag. Comparison of the spectral energy distribution to SNe II suggests that SPIRITS 16tn was both highly obscured and intrinsically dim, possibly akin to the low-luminosity SN 2005cs. We infer the presence of an IR dust echo powered by an initial peak luminosity of the transient of 5 × 1040 erg s−1 ≲ Lpeak ≲ 4 × 1043 erg s−1, consistent with the observed range for SNe II. This discovery illustrates the power of IR surveys to overcome the compounding effects of visible extinction and optically subluminous events in completing the inventory of nearby SNe.
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Details from ArXiV

SKA-Athena Synergy White Paper

(2018)

Authors:

R Cassano, R Fender, C Ferrari, A Merloni, T Akahori, H Akamatsu, Y Ascasibar, D Ballantyne, G Brunetti, E Corbelli, J Croston, I Donnarumma, S Ettori, R Ferdman, L Feretti, J Forbrich, C Gheller, G Ghirlanda, F Govoni, A Ingallinera, M Johnston-Hollitt, M Markevitch, A Mesinger, V Moss, F Nicastro, P Padovani, F Panessa, L Piro, G Ponti, G Pratt, EM Rossi, E Sadler, M Sasaki, R Soria, I Stevens, R van Weeren, F Vazza, N Webb
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A wildly flickering jet in the black hole X-ray binary MAXI J1535-571

(2018)

Authors:

MC Baglio, DM Russell, P Casella, H Al Noori, A Al Yazeedi, T Belloni, DAH Buckley, M Cadolle Bel, C Ceccobello, S Corbel, F Coti Zelati, M Diaz Trigo, RP Fender, E Gallo, P Gandhi, J Homan, KII koljonen, F lewis, TJ Maccarone, J Malzac, S Markoff, JCA Miller-Jones, K O'Brien, TD Russell, P Saikia, T Shahbaz, GR Sivakoff, R Soria, V Testa, AJ Tetarenko, ME van den Ancker, FM Vincentelli
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