An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data
Using high-precision astrometric optical observations from the Walter Baade Magellan Telescope in conjunction with high-resolution very long baseline interferometric (VLBI) radio imaging with the Very Long Baseline Array (VLBA), we have located the core of the X-ray binary system XTE J1752-223. Comp...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing Ltd.
2011
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| Online Access: | http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18704.x/abstract http://hdl.handle.net/20.500.11937/8748 |
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| author | Miller-Jones, James Jonker, P. Ratti, E. Torres, M. Brocksopp, C. Yang, J. Morrell, N. |
| author_facet | Miller-Jones, James Jonker, P. Ratti, E. Torres, M. Brocksopp, C. Yang, J. Morrell, N. |
| author_sort | Miller-Jones, James |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Using high-precision astrometric optical observations from the Walter Baade Magellan Telescope in conjunction with high-resolution very long baseline interferometric (VLBI) radio imaging with the Very Long Baseline Array (VLBA), we have located the core of the X-ray binary system XTE J1752-223. Compact radio emission from the core was detected following the state transition from the soft to the hard X-ray state. Its position to the south-east of all previously detected jet components mandated a re-analysis of the existing VLBI data. Our analysis suggests that the outburst comprised at least two ejection events prior to 2010 February 26. No radio-emitting components were detected to the south-east of the core at any epoch, suggesting that the receding jets were Doppler-deboosted below our sensitivity limit. From the ratio of the brightness of the detected components to the measured upper limits for the receding ejecta, we constrain the jet speed ß > 0.66 and the inclination angle to the line of sight ? < 49°. Assuming that the initial ejection event occurred at the transition from the hard intermediate state to the soft intermediate state, an initial period of ballistic motion followed by a Sedov phase (i.e. self-similar adiabatic expansion) appears to fit the motion of the ejecta better than a uniform deceleration model. The accurate core location can provide a long time baseline for a future proper motion determination should the system show a second outburst, providing insights into the formation mechanism of the compact object. |
| first_indexed | 2025-11-14T06:22:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-8748 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:22:18Z |
| publishDate | 2011 |
| publisher | Wiley-Blackwell Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-87482019-02-19T04:25:52Z An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data Miller-Jones, James Jonker, P. Ratti, E. Torres, M. Brocksopp, C. Yang, J. Morrell, N. astrometry radio continuum: stars stars: individual: XTE J1752-223 X-rays: binaries ISM: jets and outflows Using high-precision astrometric optical observations from the Walter Baade Magellan Telescope in conjunction with high-resolution very long baseline interferometric (VLBI) radio imaging with the Very Long Baseline Array (VLBA), we have located the core of the X-ray binary system XTE J1752-223. Compact radio emission from the core was detected following the state transition from the soft to the hard X-ray state. Its position to the south-east of all previously detected jet components mandated a re-analysis of the existing VLBI data. Our analysis suggests that the outburst comprised at least two ejection events prior to 2010 February 26. No radio-emitting components were detected to the south-east of the core at any epoch, suggesting that the receding jets were Doppler-deboosted below our sensitivity limit. From the ratio of the brightness of the detected components to the measured upper limits for the receding ejecta, we constrain the jet speed ß > 0.66 and the inclination angle to the line of sight ? < 49°. Assuming that the initial ejection event occurred at the transition from the hard intermediate state to the soft intermediate state, an initial period of ballistic motion followed by a Sedov phase (i.e. self-similar adiabatic expansion) appears to fit the motion of the ejecta better than a uniform deceleration model. The accurate core location can provide a long time baseline for a future proper motion determination should the system show a second outburst, providing insights into the formation mechanism of the compact object. 2011 Journal Article http://hdl.handle.net/20.500.11937/8748 http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18704.x/abstract Wiley-Blackwell Publishing Ltd. restricted |
| spellingShingle | astrometry radio continuum: stars stars: individual: XTE J1752-223 X-rays: binaries ISM: jets and outflows Miller-Jones, James Jonker, P. Ratti, E. Torres, M. Brocksopp, C. Yang, J. Morrell, N. An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title | An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title_full | An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title_fullStr | An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title_full_unstemmed | An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title_short | An accurate position for the black hole candidate XTE J1752-223: re-interpretation of the VLBI data |
| title_sort | accurate position for the black hole candidate xte j1752-223: re-interpretation of the vlbi data |
| topic | astrometry radio continuum: stars stars: individual: XTE J1752-223 X-rays: binaries ISM: jets and outflows |
| url | http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18704.x/abstract http://hdl.handle.net/20.500.11937/8748 |