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Cosmological two-stream instability

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
0370-2693
289-292
Comer, G.L.
f2c1746c-8638-4268-94f0-e5d4375f0358
Peter, P.
704de2e8-9df9-428a-9e72-bc9bacda8cf1
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Comer, G.L.
f2c1746c-8638-4268-94f0-e5d4375f0358
Peter, P.
704de2e8-9df9-428a-9e72-bc9bacda8cf1
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304

Comer, G.L., Peter, P. and Andersson, N. (2012) Cosmological two-stream instability. Physics Letters B, 715 (4-5), 289-292. (doi:10.1016/j.physletb.2012.07.069).

Record type: Article

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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More information

Published date: 10 September 2012
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 342538
URI: http://eprints.soton.ac.uk/id/eprint/342538
ISSN: 0370-2693
PURE UUID: c1d2246f-71f5-48db-8d67-e7f0b5a9a338
ORCID for N. Andersson: ORCID iD orcid.org/0000-0001-8550-3843

Catalogue record

Date deposited: 06 Sep 2012 07:58
Last modified: 15 Mar 2024 02:59

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Contributors

Author: G.L. Comer
Author: P. Peter
Author: N. Andersson ORCID iD

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