期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 498, 期 4, 页码 5772-5785出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa2650
关键词
acceleration of particles; accretion, accretion discs; ISM: jets and outflows; submillimetre: general; X-rays: binaries; X-rays: individual (MAXI J1535-571)
资金
- Netherlands Organisation for Scientific Research (NWO) Veni Fellowship [639.041.646]
- NWO VICI award [639.043.513]
- Australian Research Council Future Fellowship - Australian government [FT140101082]
- Natural Sciences and Engineering Research Council of Canada (NSERC) Post-Graduate Doctoral Scholarship [PGSD2-490318-2016]
- NSERC Discovery Grant [RGPIN-06569-2016]
- Eberly College of Science at the Pennsylvania State University
- Academy of Finland [320085]
- NWO Vidi grant
- Australian Government
- Academy of Finland (AKA) [320085] Funding Source: Academy of Finland (AKA)
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 approximate to 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 similar to 1-2 d after the onset of the jet quenching.
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