Modelling oscillations in the jet emission from microquasar GRS 1915+105


Collins, R.S., Kaiser, C.R. and Cox, S.J. (2003) Modelling oscillations in the jet emission from microquasar GRS 1915+105. Monthly Notices of the Royal Astronomical Socity, 338, (2), 331-339. (doi:10.1046/j.1365-8711.2003.06100.x).

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Description/Abstract

The variability in the infrared to millimetre emission from microquasar GRS 1915+105 is believed to be dominated by the system's relativistic jet. In this paper we develop a time-dependent version of the jet emission model of Blandford & Königl and apply it to the oscillations in the infrared and millimetre emission from GRS 1915+105 observed recently by Fender & Pooley. The resulting model provides a reasonable description of the observed flux oscillations from GRS 1915+105. From a fit of the observed time lag between the flux peaks in the infrared and millimetre emission together with the flux normalization, we were able to determine the model parameters for the GRS 1915+105 jet. We find that to achieve the observed flux levels with the model requires an unphysically large electron density within the jet. We therefore conclude that the Blandford & Königl model cannot explain these observations, either because it does not provide the correct description of the emission from microquasar jets, or because the observed emission variations do not originate in the jet.

Item Type: Article
ISSNs: 0035-8711 (print)
Related URLs:
Keywords: non-thermal radiation mechanisms, close binaries, GRS 1915+105, ISM, jets, outflows, infrared, radio continuum, stars
Subjects: Q Science > QB Astronomy
Q Science > QA Mathematics
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Electronics and Computer Science
University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 22373
Date Deposited: 24 Mar 2006
Last Modified: 27 Mar 2014 18:11
URI: http://eprints.soton.ac.uk/id/eprint/22373

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