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dc.contributor.authorMacquart, Jean-pierre
dc.date.accessioned2017-01-30T15:26:07Z
dc.date.available2017-01-30T15:26:07Z
dc.date.created2010-03-23T20:02:56Z
dc.date.issued2004
dc.identifier.citationMacquart, J. P. 2004. Scattering of gravitational radiation: Second order moments of the wave amplitude*. Astronomy and Astrophysics. 422: pp. 761-775.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/46265
dc.identifier.doi10.1051/0004-6361:20034512
dc.description.abstract

Gravitational radiation that propagates through an inhomogeneous mass distribution is subject to random gravitational lensing, or scattering, causing variations in the wave amplitude and temporal smearing of the signal. A statistical theory is constructed to treat these effects. The statistical properties of the wave amplitude variations are a direct probe of the power spectrum of the mass distribution through which the waves propagate. Scattering temporally smears any intensity variationsintrinsic to a source emitting gravitational radiation, rendering variability on time scales shorter than the temporal smearing time scale unobservable, and potentially making the radiation much harder to detect. Gravitational radiation must propagate out through the mass distribution of its host galaxy before it can be detected at the Earth. Plausible models for the distribution of matter in an L* host galaxy suggest that the temporal smearing time scale is at least several milliseconds due to the gas content alone, and may be as large as a second if dark matter also scatters the radiation. The smearing time due to scattering by any galaxy interposed along the line of sight is a factor ~105 times larger. Gravitational scattering is an excellent probe of matter on parsec and sub-parsec scales, and has the potential to elucidate the nature of dark matter.

dc.publisherEDP Sciences
dc.subjectgravitational waves
dc.subjectdark matter
dc.subjectgravitational lensing
dc.subjectcosmology
dc.subjectscattering galaxies
dc.titleScattering of gravitational radiation: Second order moments of the wave amplitude*
dc.typeJournal Article
dcterms.source.volume422
dcterms.source.startPage761
dcterms.source.endPage775
dcterms.source.issn0004-6361
dcterms.source.titleAstronomy and Astrophysics
curtin.note

© INRA, EDP Sciences, 2004

curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.facultyCurtin Institute of Radio Astronomy


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