SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26
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...
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Institute of Physics Publishing
2015
|
| Online Access: | http://hdl.handle.net/20.500.11937/30675 |
| _version_ | 1848753155549954048 |
|---|---|
| author | Tetarenko, A. Sivakoff, G. Miller-Jones, James Curran, Peter Russell, T. Coulson, I. Heinz, S. Maitra, D. Markoff, S. Migliari, S. Petitpas, G. Rupen, M. Rushton, A. Russell, D. Sarazin, C. |
| author_facet | Tetarenko, A. Sivakoff, G. Miller-Jones, James Curran, Peter Russell, T. Coulson, I. Heinz, S. Maitra, D. Markoff, S. Migliari, S. Petitpas, G. Rupen, M. Rushton, A. Russell, D. Sarazin, C. |
| author_sort | Tetarenko, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T08:20:01Z |
| format | Journal Article |
| id | curtin-20.500.11937-30675 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:20:01Z |
| publishDate | 2015 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-306752017-09-13T15:10:07Z SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 Tetarenko, A. Sivakoff, G. Miller-Jones, James Curran, Peter Russell, T. Coulson, I. Heinz, S. Maitra, D. Markoff, S. Migliari, S. Petitpas, G. Rupen, M. Rushton, A. Russell, D. Sarazin, C. 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. 2015 Journal Article http://hdl.handle.net/20.500.11937/30675 10.1088/0004-637X/805/1/30 Institute of Physics Publishing fulltext |
| spellingShingle | Tetarenko, A. Sivakoff, G. Miller-Jones, James Curran, Peter Russell, T. Coulson, I. Heinz, S. Maitra, D. Markoff, S. Migliari, S. Petitpas, G. Rupen, M. Rushton, A. Russell, D. Sarazin, C. SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title | SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title_full | SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title_fullStr | SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title_full_unstemmed | SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title_short | SUB-mm Jet Properties of the X-Ray Binary Swift J1745-26 |
| title_sort | sub-mm jet properties of the x-ray binary swift j1745-26 |
| url | http://hdl.handle.net/20.500.11937/30675 |