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- Xref: sparky sci.astro:13397 sci.physics:21705
- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!jvnc.net!princeton!lyman!bscott
- From: bscott@lyman.pppl.gov (Bruce Scott)
- Newsgroups: sci.astro,sci.physics
- Subject: Re: Detecting Second-Order GR Effects in Binary Pulsars
- Message-ID: <1529@lyman.pppl.gov>
- Date: 23 Dec 92 23:39:10 GMT
- References: <1992Dec11.225138.8045@s1.gov> <BzD29o.G43@well.sf.ca.us> <MATT.92Dec16162533@physics2.berkeley.edu> <1528@lyman.pppl.gov> <1992Dec23.072226.18595@sfu.ca>
- Reply-To: bscott@lyman.UUCP (Bruce Scott)
- Followup-To: sci.astro
- Organization: Princeton University, Plasma Physics Laboratory
- Lines: 26
-
- palmer@sfu.ca (Leigh Palmer) writes:
-
- > [...] My question relates to wave solutions with a symmetry appropriate
- >to the problem under examination here, radiation from the PSR 1913+16
- >system (I'm not sure I've got that number right, but you know the one
- >I mean). The radiation from that system cannot be plane waves.
-
- Any more than EM radiation from orbiting charges (in the *classical*
- theory) can be plane waves. How you get from the one to the other in
- EM is clear, and it works the same way in GR. That is, as long as lineari-
- isation of the theory is appropriate.
-
- The GR system of outgoing waves emanating from two masses in orbit
- is exactly analogous to the EM system of outgoing waves emanating from
- two charges in orbit (again, classical EM). The usual argument against
- incoming waves in this problem is causality. Once you've done that the
- linear problem should be asymptotically solvable (wavelength >> orbit
- radius as the other small parameter).
-
- Sorry to beg off more detail--I don't have access to Misner, Thorne,
- Wheeler for at least another month.
- --
- Gruss,
- Dr Bruce Scott The deadliest bullshit is
- Max-Planck-Institut fuer Plasmaphysik odorless and transparent
- bds at spl6n1.aug.ipp-garching.mpg.de -- W Gibson
-