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

Modelling oscillations in the jet emission from microquasar GRS 1915+105
Modelling oscillations in the jet emission from microquasar GRS 1915+105
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.
non-thermal radiation mechanisms, close binaries, GRS 1915+105, ISM, jets, outflows, infrared, radio continuum, stars
1365-2966
331-339
Collins, R.S.
2c4ddc9e-d9a9-40fa-a14f-7304ee06c196
Kaiser, C.R.
a486973d-799c-401e-aa99-47dddd3972f7
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
Collins, R.S.
2c4ddc9e-d9a9-40fa-a14f-7304ee06c196
Kaiser, C.R.
a486973d-799c-401e-aa99-47dddd3972f7
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55

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 Society, 338 (2), 331-339. (doi:10.1046/j.1365-8711.2003.06100.x).

Record type: Article

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.

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More information

Published date: 2003
Keywords: non-thermal radiation mechanisms, close binaries, GRS 1915+105, ISM, jets, outflows, infrared, radio continuum, stars

Identifiers

Local EPrints ID: 22373
URI: http://eprints.soton.ac.uk/id/eprint/22373
ISSN: 1365-2966
PURE UUID: 20be4fa2-eee5-43f4-8b34-8792aa0930a1

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Date deposited: 24 Mar 2006
Last modified: 15 Mar 2024 06:37

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Contributors

Author: R.S. Collins
Author: C.R. Kaiser
Author: S.J. Cox

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