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Article #1059

Re: The Speed of Gravity Waves

#1059
From: Jonathan M. Gilligan
Date: Fri, 10 Apr 1992 22:33
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In article <22642@dog.ee.lbl.gov> sichase@csa2.lbl.gov writes:
>There recently was a discussion of gravity waves and I asserted that 
>the speed of such waves must necessarily be Cem, the speed of electromagnetic
>waves, by virtue of the masslessness of the graviton.  I have since learned
>that my answer was not complete.  Here is as better explanation:

(discussion of Brans-Diske models omitted)

>A definitive test would be produced by LIGO in coincidence with optical 
>measurements of some catastrophic event which generates enough gravitational
>radiation to be detected.  Then the "time of flight" of both gravitons and
>photons from the source to the Earth could be measured, and strict direct
>limits could be set on Cgw. 

I would think that some information could be gleaned from the spindown
of pulsars due to gravitational radiation. But I'm ignorant of such things.
Can someone who knows comment?

---Jon
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Path: arc1-ca.pugleaf.net!sparky!news.UU.NET!dove!gilligan
From: gilligan@bldrdoc.gov (Jonathan M. Gilligan)
Newsgroups: sci.physics,alt.sci.physics.new-theories
Subject: Re: The Speed of Gravity Waves
Message-ID: <2736@dove.nist.gov>
Date: 10 Apr 92 22:33:23 GMT
References: <22642@dog.ee.lbl.gov>
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Organization: National Institute of Standards and Technology
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