Disk-Jet Coupling in the 2017/2018 Outburst of the Galactic Black Hole Candidate X-Ray Binary MAXI J1535-571

T. D. Russell, A. J. Tetarenko, J. C.A. Miller-Jones, G. R. Sivakoff, A. S. Parikh, S. Rapisarda, R. Wijnands, S. Corbel, E. Tremou, D. Altamirano, M. C. Baglio, C. Ceccobello, N. Degenaar, J. van den Eijnden, R. Fender, I. Heywood, H. A. Krimm, M. Lucchini, S. Markoff, D. M. RussellR. Soria, P. A. Woudt

Research output: Contribution to journalArticlepeer-review


MAXI J1535-571 is a Galactic black hole candidate X-ray binary that was discovered going into outburst in 2017 September. In this paper, we present comprehensive radio monitoring of this system using the Australia Telescope Compact Array, as well as the MeerKAT radio observatory, showing the evolution of the radio jet during its outburst. Our radio observations show the early rise and subsequent quenching of the compact jet as the outburst brightened and then evolved toward the soft state. We constrain the compact jet quenching factor to be more than 3.5 orders of magnitude. We also detected and tracked (for 303 days) a discrete, relativistically moving jet knot that was launched from the system. From the motion of the apparently superluminal knot, we constrain the jet inclination (at the time of ejection) and speed to ≤45° and ≥0.69 c, respectively. Extrapolating its motion back in time, our results suggest that the jet knot was ejected close in time to the transition from the hard intermediate state to soft intermediate state. The launching event also occurred contemporaneously with a short increase in X-ray count rate, a rapid drop in the strength of the X-ray variability, and a change in the type-C quasi-periodic oscillation (QPO) frequency that occurs >2.5 days before the first appearance of a possible type-B QPO.

Original languageEnglish (US)
Article number198
JournalAstrophysical Journal
Issue number2
StatePublished - Oct 1 2019


  • ISM: Jets and outflows
  • X-rays: Binaries
  • accretion, accretion disks
  • black hole physics
  • radio continuum: Stars
  • stars: Individual (MAXI J1535-571)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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