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dc.contributor.authorMiller-Jones, James
dc.contributor.authorMoin, Aquib
dc.contributor.authorTingay, Steven
dc.contributor.authorReynolds, Cormac
dc.contributor.authorPhillips, C.
dc.contributor.authorTzioumis, A.
dc.contributor.authorFender, R.
dc.contributor.authorMcCallum, J.
dc.contributor.authorNicolson, G.
dc.contributor.authorTudose, V.
dc.identifier.citationMiller-Jones, J. and Moin, A. and Tingay, S. and Reynolds, C. and Phillips, C. and Tzioumis, A. and Fender, R. et al. 2012. The first resolved imaging of milliarcsecond-scale jets in Circinus X-1. Monthly Notices of the Royal Astronomical Society: Letters. 419 (1): pp. L49-L53.

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.

dc.publisherWiley-Blackwell Publishing Ltd.
dc.subjectstars: individual: Circinus X-1
dc.subjectradio continuum: stars
dc.subjectX-rays: binaries
dc.subjectISM: jets and outflows
dc.titleThe first resolved imaging of milliarcsecond-scale jets in Circinus X-1
dc.typeJournal Article
dcterms.source.titleMonthly Notices of the Royal Astronomical Society: Letters

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, ©: 2011, the authors and the Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access

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