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dc.contributor.authorTetarenko, A.J.
dc.contributor.authorSivakoff, G.R.
dc.contributor.authorMiller-Jones, James
dc.contributor.authorBremer, M.
dc.contributor.authorMooley, K.P.
dc.contributor.authorFender, R.P.
dc.contributor.authorRumsey, C.
dc.contributor.authorBahramian, Arash
dc.contributor.authorAltamirano, D.
dc.contributor.authorHeinz, S.
dc.contributor.authorMaitra, D.
dc.contributor.authorMarkoff, S.B.
dc.contributor.authorMigliari, S.
dc.contributor.authorRupen, M.P.
dc.contributor.authorRussell, D.M.
dc.contributor.authorRussell, T.D.
dc.contributor.authorSarazin, C.L.
dc.date.accessioned2020-07-22T14:03:51Z
dc.date.available2020-07-22T14:03:51Z
dc.date.issued2019
dc.identifier.citationTetarenko, A.J. and Sivakoff, G.R. and Miller-Jones, J.C.A. and Bremer, M. and Mooley, K.P. and Fender, R.P. and Rumsey, C. et al. 2019. Tracking the variable jets of V404 Cygni during its 2015 outburst. Monthly Notices of the Royal Astronomical Society. 482 (3): pp. 2950-2972.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/80177
dc.identifier.doi10.1093/mnras/sty2853
dc.description.abstract

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We present multifrequency monitoring observations of the black hole X-ray binary V404 Cygni throughout its 2015 June outburst. Our data set includes radio and mm/sub-mm photometry, taken with the Karl G. Jansky Very Large Array, Arc-Minute MicroKelvin Imager Large Array, Sub-millimeter Array, James Clerk Maxwell Telescope, and the Northern Extended Millimetre Array, combined with publicly available infrared, optical, UV, and X-ray measurements. With these data, we report detailed diagnostics of the spectral and variability properties of the jet emission observed during different stages of this outburst. These diagnostics show that emission from discrete jet ejecta dominated the jet emission during the brightest stages of the outburst. We find that the ejecta became fainter, slower, less frequent, and less energetic, before the emission transitioned (over 1-2 d) to being dominated by a compact jet, as the outburst decayed towards quiescence. While the broad-band spectrum of this compact jet showed very little evolution throughout the outburst decay (with the optically thick to thin synchrotron jet spectral break residing in the near-infrared/optical bands; ∼2-5 × 1014 Hz), the emission still remained intermittently variable at mm/sub-mm frequencies. Additionally, we present a comparison between the radio jet emission throughout the 2015 and previous 1989 outbursts, confirming that the radio emission in the 2015 outburst decayed significantly faster than in 1989. Lastly, we detail our sub-mm observations taken during the 2015 December mini-outburst of V404 Cygni, which demonstrate that, similar to the main outburst, the source was likely launching jet ejecta during this short period of renewed activity.

dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FT140101082
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectAstronomy & Astrophysics
dc.subjectblack hole physics
dc.subjectstars: individual (V404 Cygni, GS 2023+338)
dc.subjectISM: jets and outflows
dc.subjectradio continuum: stars
dc.subjectsubmillmetre: stars
dc.subjectX-rays: binaries
dc.subjectX-RAY BINARIES
dc.subjectTRANSIENT GS 2023+338
dc.subjectBROAD-BAND SPECTRUM
dc.subjectHARD STATE
dc.subjectSYNCHROTRON EMISSION
dc.subjectMULTIPLE EJECTIONS
dc.subjectRELATIVISTIC JETS
dc.subjectACCRETION DISC
dc.subjectRADIO-EMISSION
dc.subjectMINI-OUTBURSTS
dc.titleTracking the variable jets of V404 Cygni during its 2015 outburst
dc.typeJournal Article
dcterms.source.volume482
dcterms.source.number3
dcterms.source.startPage2950
dcterms.source.endPage2972
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
dc.date.updated2020-07-22T14:03:49Z
curtin.note

Copyright © 2019 The American Astronomical Society. All rights reserved.

curtin.departmentSchool of Elec Eng, Comp and Math Sci (EECMS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidBahramian, Arash [0000-0003-2506-6041]
curtin.contributor.orcidMiller-Jones, James [0000-0003-3124-2814]
curtin.contributor.researcheridMiller-Jones, James [B-2411-2013]
dcterms.source.eissn1365-2966
curtin.contributor.scopusauthoridMiller-Jones, James [10044231400]


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