SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26
MetadataShow full item record
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.
Showing items related by title, author, creator and subject.
Russell, D.; Markoff, S.; Casella, P.; Cantrell, A.; Chatterjee, R.; Fender, R.; Gallo, E.; Gandhi, P.; Homan, J.; Maitra, D.; Miller-Jones, James; O'Brien, K.; Shahbaz, T. (2013)In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to ?-ray energies, the contribution of the jet is debated. The total luminosity, and hence power of the ...
Callingham, J.; Gaensler, B.; Ekers, R.; Tingay, Steven; Wayth, Randall; Morgan, J.; Bernardi, G.; Bell, M.; Bhat, R.; Bowman, J.; Briggs, F.; Cappallo, R.; Deshpande, A.; Ewall-Wice, A.; Feng, L.; Greenhill, L.; Hazelton, B.; Hindson, L.; Hurley-Walker, N.; Jacobs, D.; Johnston-Hollitt, M.; Kaplan, D.; Kudrayvtseva, N.; Lenc, E.; Lonsdale, C.; McKinley, B.; McWhirter, S.; Mitchell, D.; Morales, M.; Morgan, E.; Oberoi, D.; Offringa, A.; Ord, S.; Pindor, B.; Prabu, T.; Procopio, P.; Riding, J.; Srivani, K.; Subrahmanyan, R.; Shankar, N.; Webster, R.; Williams, A.; Williams, C. (2015)We present broadband observations and spectral modeling of PKS B0008-421 and identify it as an extreme gigahertz-peaked spectrum (GPS) source. PKS B0008-421 is characterized by the steepest known spectral slope below the ...
Broad-band monitoring tracing the evolution of the jet and disc in the black hole candidate X-ray binary MAXI J1659-152van der Horst, A.; Curran, Peter; Miller-Jones, James; Linford, J.; Gorosabel, J.; Russell, D.; de Ugarte Postigo, A.; Lundgren, A.; Taylor, G.; Maitra, D.; Guziy, S.; Belloni, T.; Kouveliotou, C.; Jonker, P.; Kamble, A.; Paragi, Z.; Homan, J.; Kuulkers, E.; Granot, J.; Altamirano, D.; Buxton, M.; Castro-Tirado, A.; Fender, R.; Garrett, M.; Gehrels, N.; Hartmann, D.; Kennea, J.; Krimm, H.; Mangano, V.; Ramirez-Ruiz, E.; Romano, P.; Wijers, R.; Wijnands, R.; Yang, Y. (2013)MAXI J1659-152 was discovered on 2010 September 25 as a new X-ray transient, initially identified as a gamma-ray burst, but was later shown to be a new X-ray binary with a black hole as the most likely compact object. ...