Radio polarimetry as a probe of unresolved jets: The 2013 outburst of XTE J1908+094
|dc.identifier.citation||Curran, P. and Miller-Jones, J. and Rushton, A. and Pawar, D. and Anderson, G. and Altamirano, D. and Krimm, H. et al. 2015. Radio polarimetry as a probe of unresolved jets: The 2013 outburst of XTE J1908+094. Monthly Notices of the Royal Astronomical Society. 451 (4): pp. 3975-3985.|
XTE J1908+094 is an X-ray transient black hole candidate in the Galactic plane that was observed in outburst in 2002 and 2013. Here we present multifrequency radio and X-ray data, including radio polarimetry, spanning the entire period of the 2013 outburst. We find that the X-ray behaviour of XTE J1908+094 traces the standard black hole hardness–intensity path, evolving from a hard state, through a soft state, before returning to a hard state and quiescence. Its radio behaviour is typical of a compact jet that becomes quenched before discrete ejecta are launched during the late stages of X-ray softening. The radio and X-ray fluxes, as well as the light-curve morphologies, are consistent with those observed during the 2002 outburst of this source. The polarization angle during the rise of the outburst infers a jet orientation in agreement with resolved observations but also displays a gradual drift, which we associate with observed changes in the structure of the discrete ejecta. We also observe an unexpected 90° rotation of the polarization angle associated with a second component.
|dc.publisher||Oxford University Press|
|dc.title||Radio polarimetry as a probe of unresolved jets: The 2013 outburst of XTE J1908+094|
|dcterms.source.title||Monthly Notices of the Royal Astronomical Society|
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
|curtin.department||Department of Physics and Astronomy|