Radio polarimetry as a probe of unresolved jets: the 2013 outburst of XTE J1908+094

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DOIResolve DOI: http://doi.org/10.1093/mnras/stv1252
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TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
1365-2966
Volume451
Issue4
Pages39753985
Subjectbinaries: close; stars: individual: XTE J1908+094; X-rays: binaries; X-rays: bursts
AbstractXTE 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.
Publication date
PublisherOxford University Press
LanguageEnglish
AffiliationNRC Herzberg Astronomy and Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number23001593
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Record identifier162155b8-be48-4858-8795-fc50f86bd310
Record created2017-03-09
Record modified2017-03-30
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