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Nuclear PhysicsB237(1984)226-236 North-Holland PublishingCompany
 

Summary: Nuclear PhysicsB237(1984)226-236
©North-Holland PublishingCompany
GAUGE-INVARIANT COSMOLOGICAL FLUCTUATIONS OF
UNCOUPLED FLUIDS*
L.F. ABBOTT
Physics Department, Brandeis University, Waltham, MA 02254, USA
Mark B. WISE
California Institute of Technology, Pasadena, CA 91125, USA
Received25 July 1983
(Revised17 October1983)
The gauge-invariantapproach to cosmologicalperturbations introduced by Bardeen is ex-
tended to the case of multiple fluids which are uncoupled, except for gravitationalinteractions.
The most generalscalar,vector,and tensorfluctuationsare considered.The resultingequationsare
applied to fluctuations involving axions and radiation and axions and baryons in the early
universe.
1. Introduction
There is considerable evidence [1] that the energy density of the universe contains
a large dark matter component along with the ordinary luminous component we see.
Massive neutrinos [2], photinos [3], gravitinos [4] and axions [5] have all been
proposed as candidates for the dark matter. The luminous and dark matter appear to

  

Source: Abbott, Laurence - Center for Neurobiology and Behavior & Department of Physiology and Cellular Biophysics, Columbia University

 

Collections: Biology and Medicine