Journal Article

A decade of high-resolution radio observations of GRS 1915+105

A. Rushton, R. E. Spencer, G. Pooley and S. Trushkin

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 4, pages 2611-2621
Published in print February 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI:
A decade of high-resolution radio observations of GRS 1915+105

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The radio emitting X-ray binary GRS 1915+105 shows a wide variety of X-ray and radio states. We present a decade of monitoring observations, with the Rossi X-ray Timing Explorer–All Sky Monitor and the Ryle Telescope, in conjunction with high-resolution radio observations using Multi-Element Radio-Linked Interferometer Network and the The Very Long Baseline Array. Linear polarization at 1.4 and 1.6 GHz has been spatially resolved in the radio jets, on a scale of ∼150 mas and at flux densities of a few mJy. Depolarization of the core occurs during radio flaring, associated with the ejection of relativistic knots of emission. We have identified the ejection at four epochs of X-ray flaring. Assuming no deceleration, proper motions of 16.5 to 27 mas per day have been observed, supporting the hypothesis of a varying angle to the line of sight per ejection, perhaps in a precessing jet.

Keywords: ISM: jets and outflows; X-ray: binaries; X-ray: individual (GRS 1915+105)

Journal Article.  7100 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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