Cosmological gravitational wave background from primordial density perturbations

Journal Article

2007

Permanent link to this Item
http://hdl.handle.net/11427/34629
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AnandaKishoreN_Cosmological_gr_2007.pdf (920.11 KB)
Authors
Ananda, Kishore N
Clarkson, Chris
Wands, David
Journal Title

Physical Review D - Particles and Fields

Link to Journal
https://dx.doi.org/10.1103/PhysRevD.75.123518
Journal ISSN
Volume Title
Publisher
Publisher
Department
Department of Mathematics and Applied Mathematics
Faculty
Faculty of Science
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Series
Abstract
We discuss the gravitational wave background generated by primordial density perturbations evolving during the radiation era. At second order in a perturbative expansion, density fluctuations produce gravitational waves. We calculate the power spectra of gravitational waves from this mechanism, and show that, in principle, future gravitational wave detectors could be used to constrain the primordial power spectrum on scales vastly different from those currently being probed by a large-scale structure. As examples we compute the gravitational wave background generated by both a power-law spectrum on all scales, and a delta-function power spectrum on a single scale
Description
Keywords
physics of elementary particles and fields
cosmology
delta function
energy spectra
expansion
fluctuations
gravitational wave detectors
gravitational waves
perturbation theory

Reference:

Ananda, K.N., Clarkson, C. & Wands, D. 2007. Cosmological gravitational wave background from primordial density perturbations. Physical Review D - Particles and Fields. 75(12):174 - 177. http://hdl.handle.net/11427/34629

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