The first resolved imaging of milliarcsecond-scale jets in Circinus X-1
We present the first resolved imaging of the milliarcsecond-scale jets in the neutron star X-ray binary Circinus X-1, made using the Australian Long Baseline Array. The angular extent of the resolved jets is ~20 mas, corresponding to a physical scale of ~150 au at the assumed distance of 7.8 kpc. Th...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing Ltd.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/8935 |
| _version_ | 1848745804409339904 |
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| author | Miller-Jones, James Moin, Aquib Tingay, Steven Reynolds, Cormac Phillips, C. Tzioumis, A. Fender, R. McCallum, J. Nicolson, G. Tudose, V. |
| author_facet | Miller-Jones, James Moin, Aquib Tingay, Steven Reynolds, Cormac Phillips, C. Tzioumis, A. Fender, R. McCallum, J. Nicolson, G. Tudose, V. |
| author_sort | Miller-Jones, James |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present the first resolved imaging of the milliarcsecond-scale jets in the neutron star X-ray binary Circinus X-1, made using the Australian Long Baseline Array. The angular extent of the resolved jets is ~20 mas, corresponding to a physical scale of ~150 au at the assumed distance of 7.8 kpc. The jet position angle is relatively consistent with previous arcsecond-scale imaging with the Australia Telescope Compact Array. The radio emission is symmetric about the peak, and is unresolved along the minor axis, constraining the opening angle to be <20°. We observe evidence for outward motion of the components between the two halves of the observation. Constraints on the proper motion of the radio-emitting components suggest that they are only mildly relativistic, although we cannot definitively rule out the presence of the unseen, ultrarelativistic (G > 15) flow previously inferred to exist in this system. |
| first_indexed | 2025-11-14T06:23:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-8935 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:23:11Z |
| publishDate | 2012 |
| publisher | Wiley-Blackwell Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-89352017-09-13T14:37:52Z The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 Miller-Jones, James Moin, Aquib Tingay, Steven Reynolds, Cormac Phillips, C. Tzioumis, A. Fender, R. McCallum, J. Nicolson, G. Tudose, V. stars: individual: Circinus X-1 radio continuum: stars X-rays: binaries ISM: jets and outflows We present the first resolved imaging of the milliarcsecond-scale jets in the neutron star X-ray binary Circinus X-1, made using the Australian Long Baseline Array. The angular extent of the resolved jets is ~20 mas, corresponding to a physical scale of ~150 au at the assumed distance of 7.8 kpc. The jet position angle is relatively consistent with previous arcsecond-scale imaging with the Australia Telescope Compact Array. The radio emission is symmetric about the peak, and is unresolved along the minor axis, constraining the opening angle to be <20°. We observe evidence for outward motion of the components between the two halves of the observation. Constraints on the proper motion of the radio-emitting components suggest that they are only mildly relativistic, although we cannot definitively rule out the presence of the unseen, ultrarelativistic (G > 15) flow previously inferred to exist in this system. 2012 Journal Article http://hdl.handle.net/20.500.11937/8935 10.1111/j.1745-3933.2011.01176.x Wiley-Blackwell Publishing Ltd. fulltext |
| spellingShingle | stars: individual: Circinus X-1 radio continuum: stars X-rays: binaries ISM: jets and outflows Miller-Jones, James Moin, Aquib Tingay, Steven Reynolds, Cormac Phillips, C. Tzioumis, A. Fender, R. McCallum, J. Nicolson, G. Tudose, V. The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title | The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title_full | The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title_fullStr | The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title_full_unstemmed | The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title_short | The first resolved imaging of milliarcsecond-scale jets in Circinus X-1 |
| title_sort | first resolved imaging of milliarcsecond-scale jets in circinus x-1 |
| topic | stars: individual: Circinus X-1 radio continuum: stars X-rays: binaries ISM: jets and outflows |
| url | http://hdl.handle.net/20.500.11937/8935 |