@article{871b7cfa0f8344938786323b60a2ad3a,
title = "Rapid compact jet quenching in the Galactic black hole candidate X-ray binary MAXI J1535−571",
abstract = "We present results from six epochs of quasi-simultaneous radio, (sub-)millimetre, infrared, optical, and X-ray observations of the black hole X-ray binary MAXI J1535−571. These observations show that as the source transitioned through the hard-intermediate X-ray state towards the soft-intermediate X-ray state, the jet underwent dramatic and rapid changes. We observed the frequency of the jet spectral break, which corresponds to the most compact region in the jet where particle acceleration begins (higher frequencies indicate closer to the black hole), evolves from the infrared band into the radio band (decreasing by ≈3 orders of magnitude) in less than a day. During one observational epoch, we found evidence of the jet spectral break evolving in frequency through the radio band. Estimating the magnetic field and size of the particle acceleration region shows that the rapid fading of the high-energy jet emission was not consistent with radiative cooling; instead, the particle acceleration region seems to be moving away from the black hole on approximately dynamical time-scales. This result suggests that the compact jet quenching is not caused by local changes to the particle acceleration, rather we are observing the acceleration region of the jet travelling away from the black hole with the jet flow. Spectral analysis of the X-ray emission shows a gradual softening in the few days before the dramatic jet changes, followed by a more rapid softening ∼1-2 d after the onset of the jet quenching.",
keywords = "Acceleration of particles, Accretion, Accretion discs, ISM: jets and outflows, Submillimetre: general, X-rays: binaries, X-rays: individual (MAXI J1535−571)",
author = "Russell, {T. D.} and M. Lucchini and Tetarenko, {A. J.} and Miller-Jones, {J. C.A.} and Sivakoff, {G. R.} and F. Krau{\ss} and W. Mulaudzi and Baglio, {M. C.} and Russell, {D. M.} and D. Altamirano and C. Ceccobello and S. Corbel and N. Degenaar and {van den Eijnden}, J. and R. Fender and S. Heinz and Koljonen, {K. I.I.} and D. Maitra and S. Markoff and S. Migliari and Parikh, {A. S.} and Plotkin, {R. M.} and M. Rupen and C. Sarazin and R. Soria and R. Wijnands",
note = "Funding Information: We thank the anonymous referee for their helpful comments. We also thank Jamie Stevens and staff from the Australia Telescope National Facility for scheduling the ATCA radio observations, as well as the Swift team for the scheduling of the X-ray observations. AJT thanks Gerald Schieven for his help configuring and scheduling the ALMA observations reported in this work. TDR acknowledges support from the Netherlands Organisation for Scientific Research (NWO) Veni Fellowship, grant number 639.041.646. ML and SM are thankful for support from an NWO VICI award, grant number 639.043.513. JCAM-J is the recipient of an Australian Research Council Future Fellowship (FT140101082), funded by the Australian government. AJT acknowledges support for this work through a Natural Sciences and Engineering Research Council of Canada (NSERC) Post-Graduate Doctoral Scholarship (PGSD2-490318-2016). GRS and AJT acknowledge support from an NSERC Discovery Grant (RGPIN-06569-2016). FK was supported as an Eberly Research Fellow by the Eberly College of Science at the Pennsylvania State University. KIIK was supported by the Academy of Finland project 320085. JvdE, ASP, and ND were supported by an NWO Vidi grant, awarded to ND. This research has made use of ISIS functions (ISISscripts) provided by ECAP/Remeis Observatory and MIT (http://www.sternwarte.uni-erlangen.de/isis/). We thank J. E. Davis for the development of the slxfig module that was used to prepare some of the figures in this work. The ATCA is part of the Australia Telescope National Facility, which is funded by the Australian Government for operation as a National Facility managed by CSIRO. We acknowledge the Gomeroi people as the traditional owners of the ATCA Observatory site. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2016.1.00925.T. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Publisher Copyright: {\textcopyright} 2020 The Author(s) Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = nov,
day = "1",
doi = "10.1093/mnras/staa2650",
language = "English (US)",
volume = "498",
pages = "5772--5785",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",
}