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dc.contributor.authorTetarenko, A.
dc.contributor.authorSivakoff, G.
dc.contributor.authorMiller-Jones, James
dc.contributor.authorCurran, Peter
dc.contributor.authorRussell, T.
dc.contributor.authorCoulson, I.
dc.contributor.authorHeinz, S.
dc.contributor.authorMaitra, D.
dc.contributor.authorMarkoff, S.
dc.contributor.authorMigliari, S.
dc.contributor.authorPetitpas, G.
dc.contributor.authorRupen, M.
dc.contributor.authorRushton, A.
dc.contributor.authorRussell, D.
dc.contributor.authorSarazin, C.
dc.identifier.citationTetarenko, A. and Sivakoff, G. and Miller-Jones, J. and Curran, P. and Russell, T. and Coulson, I. and Heinz, S. et al. 2015. SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26. Astrophysical Journal. 805 (1): Article ID 30.

We present the results of our observations of the early stages of the 2012–2013 outburst of the transient black hole X-ray binary (BHXRB), Swift J1745–26, with the Very Large Array, Submillimeter Array, and James Clerk Maxwell telescope (SCUBA–2). Our data mark the first multiple-band mm and sub-mm observations of a BHXRB. During our observations the system was in the hard accretion state producing a steady, compact jet. The unique combination of radio and mm/sub-mm data allows us to directly measure the spectral indices in and between the radio and mm/sub-mm regimes, including the first mm/sub-mm spectral index measured for a BHXRB. Spectral fitting revealed that both the mm (230 GHz) and sub-mm (350 GHz) measurements are consistent with extrapolations of an inverted power law from contemporaneous radio data (1–30 GHz). This indicates that, as standard jet models predict, a power law extending up to mm/sub-mm frequencies can adequately describe the spectrum, and suggests that the mechanism driving spectral inversion could be responsible for the high mm/sub-mm fluxes (compared to radio fluxes) observed in outbursting BHXRBs. While this power law is also consistent with contemporaneous optical data, the optical data could arise from either jet emission with a jet spectral break frequency of ν break ≳1×10 14 Hz or the combination of jet emission with a lower jet spectral break frequency of ν break ≳2×10 11 Hz and accretion disk emission. Our analysis solidifies the importance of the mm/sub-mm regime in bridging the crucial gap between radio and IR frequencies in the jet spectrum, and justifies the need to explore this regime further.

dc.publisherInstitute of Physics Publishing
dc.titleSUB-mm Jet Properties of the X-Ray Binary Swift J1745-26
dc.typeJournal Article
dcterms.source.titleAstrophysical Journal
curtin.departmentDepartment of Physics and Astronomy
curtin.accessStatusOpen access

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