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Black Hole

Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Ian Heywood

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Research theme

  • Astronomy and astrophysics

Sub department

  • Astrophysics

Research groups

  • Galaxy formation and evolution
  • MeerKAT
  • Pulsars, transients and relativistic astrophysics
  • The Square Kilometre Array (SKA)
  • Breakthrough Listen
ian.heywood@physics.ox.ac.uk
  • About
  • Publications

The nature of sub-millimetre galaxies I: a comparison of AGN and star-forming galaxy SED fits

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 505:1 (2021) 1509-1529

Authors:

T Shanks, B Ansarinejad, RM Bielby, I Heywood, N Metcalfe, L Wang
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Multifrequency observations of SGR J1935+2154

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 503:4 (2021) 5367-5384

Authors:

M Bailes, CG Bassa, G Bernardi, S Buchner, M Burgay, M Caleb, AJ Cooper, G Desvignes, PJ Groot, I Heywood, F Jankowski, R Karuppusamy, M Kramer, M Malenta, G Naldi, M Pilia, G Pupillo, KM Rajwade, L Spitler, M Surnis, BW Stappers, A Addis, S Bloemen, MC Bezuidenhout, G Bianchi, DJ Champion, W Chen, LN Driessen, M Geyer, K Gourdji, JWT Hessels, VI Kondratiev, M Klein-Wolt, E Körding, R Le Poole, K Liu, ME Lower, AG Lyne, A Magro, V McBride, MB Mickaliger, V Morello, A Parthasarathy, K Paterson, BBP Perera, DLA Pieterse, Z Pleunis, A Possenti, A Rowlinson, M Serylak, G Setti, M Tavani, RAMJ Wijers, S ter Veen, V Venkatraman Krishnan, P Vreeswijk, PA Woudt
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The VLA Frontier Field Survey: A Comparison of the Radio and UV/Optical Size of 0.3 ≲ z ≲ 3 Star-forming Galaxies

The Astrophysical Journal American Astronomical Society 910:2 (2021) 106

Authors:

EF Jiménez-Andrade, EJ Murphy, I Heywood, I Smail, K Penner, E Momjian, M Dickinson, L Armus, TJW Lazio
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The VLA Frontier Fields Survey: Deep, High-resolution Radio Imaging of the MACS Lensing Clusters at 3 and 6 GHz

The Astrophysical Journal American Astronomical Society 910:2 (2021) 105

Authors:

I Heywood, EJ Murphy, EF Jiménez-Andrade, L Armus, WD Cotton, C DeCoursey, M Dickinson, TJW Lazio, E Momjian, K Penner, I Smail, OM Smirnov
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The black hole transient MAXI J1348-630: evolution of the compact and transient jets during its 2019/2020 outburst

Monthly Notices of the Royal Astronomical Society Oxford University Press 504:1 (2021) 444-468

Authors:

F Carotenuto, S Corbel, E Tremou, Td Russell, A Tzioumis, Robert Fender, Pa Woudt, Sara Motta, Jca Miller-Jones, J Chauhan, Aj Tetarenko, Gr Sivakoff, Ian Heywood, A Horesh, Aj van der Horst, E Koerding, Kunal Mooley

Abstract:

We present the radio and X-ray monitoring campaign of the 2019/2020 outburst of MAXI J1348-630, a new black hole X-ray binary (BH XRB) discovered in 2019 January. We observed MAXI J1348-630 for ∼14 months in the radio band with MeerKAT and the Australia Telescope Compact Array, and in the X-rays with MAXI and Swift/XRT. Throughout the outburst, we detected and tracked the evolution of compact and transient jets. Following the main outburst, the system underwent at least four hard-state-only re-flares, during which compact jets were again detected. For the major outburst, we observed the rise, quenching and reactivation of compact jets, as well as two single-sided discrete ejecta travelling away from the BH, launched ∼2 months apart. These ejecta displayed the highest proper motion (≳100 mas d-1) ever measured for an accreting BH binary. From the jet motion, we constrain the ejecta inclination and speed to be ≤46° and ≥0.69 c, and the opening angle and transverse expansion speed of the first component to be ≤6° and ≤0.05 c. We also infer that the first ejection happened at the hard-to-soft state transition, before a strong radio flare, while the second ejection was launched during a short excursion from the soft to the intermediate state. After travelling with constant speed, the first component underwent a strong deceleration, which was covered with unprecedented detail and suggested that MAXI J1348-630 could be located inside a low-density cavity in the interstellar medium, as already proposed for XTE J1550-564 and H1743-322.
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