Cosmological two-stream instability
Cosmological two-stream instability
Two-streaminstability requires, essentially, two things to operate: a relative flow between two fluids and some type of interaction between them. In this Letter we provide the first demonstration that this mechanism may be active in a cosmological context. Building on a recently developed formalism for cosmological models with two, interpenetrating fluids with a relative flow between them, we show that two-streaminstability may be triggered during the transition from one fluid domination to the other. We also demonstrate that the cosmological expansion eventually shuts down the instability by driving to zero the relative flow and the coupling between the two fluids
289-292
Comer, G.L.
f2c1746c-8638-4268-94f0-e5d4375f0358
Peter, P.
704de2e8-9df9-428a-9e72-bc9bacda8cf1
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
10 September 2012
Comer, G.L.
f2c1746c-8638-4268-94f0-e5d4375f0358
Peter, P.
704de2e8-9df9-428a-9e72-bc9bacda8cf1
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Abstract
Two-streaminstability requires, essentially, two things to operate: a relative flow between two fluids and some type of interaction between them. In this Letter we provide the first demonstration that this mechanism may be active in a cosmological context. Building on a recently developed formalism for cosmological models with two, interpenetrating fluids with a relative flow between them, we show that two-streaminstability may be triggered during the transition from one fluid domination to the other. We also demonstrate that the cosmological expansion eventually shuts down the instability by driving to zero the relative flow and the coupling between the two fluids
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Published date: 10 September 2012
Organisations:
Applied Mathematics
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Local EPrints ID: 342538
URI: http://eprints.soton.ac.uk/id/eprint/342538
ISSN: 0370-2693
PURE UUID: c1d2246f-71f5-48db-8d67-e7f0b5a9a338
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Date deposited: 06 Sep 2012 07:58
Last modified: 15 Mar 2024 02:59
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Author:
G.L. Comer
Author:
P. Peter
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