Sub-mm jet properties of the X-ray binary swift J1745–26

Download
  1. (PDF, 673 KB)
  2. Get@NRC: Sub-mm jet properties of the X-ray binary swift J1745–26 (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1088/0004-637X/805/1/30
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleThe Astrophysical Journal
ISSN1538-4357
Volume805
Issue1
Subjectblack hole physics; ISM: jets and outflows; radio continuum: stars; stars: individual (Swift J1745-26); submillimeter: stars; X-rays: binaries
AbstractWe 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 Vbreak ≳ 1 x 10^14 Hz or the combination of jet emission with a lower jet spectral break frequency of Vbreak ≳ 2 x 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.
Publication date
PublisherIOP Publishing
LanguageEnglish
AffiliationNRC Herzberg Astronomy and Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number23001632
Export citationExport as RIS
Report a correctionReport a correction
Record identifier23293461-9188-4617-aa8c-1728c434dada
Record created2017-03-13
Record modified2017-03-30
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)