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- Newsgroups: sci.physics
- Path: sparky!uunet!spool.mu.edu!sdd.hp.com!caen!uvaarpa!murdoch!kelvin.seas.Virginia.EDU!crb7q
- From: crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass)
- Subject: Re: No big crunch?
- Message-ID: <1992Nov5.022306.25731@murdoch.acc.Virginia.EDU>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- References: <1992Nov4.203930.20410@murdoch.acc.Virginia.EDU> <1d9lptINN94@agate.berkeley.edu> <Nov.4.20.34.21.1992.1961@ruhets.rutgers.edu>
- Date: Thu, 5 Nov 1992 02:23:06 GMT
- Lines: 32
-
- In article <Nov.4.20.34.21.1992.1961@ruhets.rutgers.edu> bweiner@ruhets.rutgers.edu (Benjamin Weiner) writes:
- >Dale Bass and others object to the hypothesizing of loads of extra
- >dark matter lying about in order to fix up our various estimates
- >of the matter density, etc. I have sympathy for this, especially
- >when it comes to postulating Mystery Particles (tm) but one thing
- >is that there is good reason to believe in a fair amount of
- >baryonic dark matter.
-
- In turn, I am much more sympathetic to baryonic dark matter if
- it can be made to work. However, we seemed to be talking about
- 'pixie' matter, a quantity that can probably be invented to
- explain anything. About 'fixing up' omega, I am not sympathetic
- at all. There seems to be no compelling need from my perspective
- to have omega be one.
-
- I was under the impression, though, that such baryonic dark matter
- ran into trouble somewhere.
-
- >Somebody just quoted Jerry Ostriker to me: "In astronomy, the only
- >real mass determination is a dynamical determination." Just 'cause
- >we can't see it doesn't mean it's not there.
-
- Absolutely, but that is no real reason to invent large amounts
- of unknown matter with unknown properties. Unknown matter with
- known properties seems more reasonable.
-
- dale bass
- --
- C. R. Bass crb7q@virginia.edu
- Department of Mechanical and Aerospace Engineering
- University of Virginia
- Charlottesville, Virginia (804) 924-7926
-