home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!think.com!spool.mu.edu!agate!darkstar.UCSC.EDU!gross
- From: gross@maxwell.ucsc.edu (Mike Gross)
- Newsgroups: sci.physics
- Subject: Re: Searching gravity info:
- Date: 21 Dec 1992 17:26:26 GMT
- Organization: University of California, Santa Cruz
- Lines: 58
- Message-ID: <1h4uo2INNph2@darkstar.UCSC.EDU>
- References: <swarner.02ur@bbs1984.chi.il.us>
- NNTP-Posting-Host: maxwell.ucsc.edu
-
- In <swarner.02ur@bbs1984.chi.il.us> swarner@bbs1984.chi.il.us (Steve Warner) writes:
-
- > Good morning all...
- > Some friends and I have a running interest in matter physics, and
- >we are in the process of gathering information on current gravity
- >theory. We are intrigued by the notion of "Dark Matter" and the role
- >it plays in both Cosmology and Physics.
- > In a recent article written by Corey S. Powell, entitled, "Machos
- >or Wimps; Astronomers stalk the invisible cosmic majority" (Scientific
- >American, January 1993, pg 27)....John A Bahcall of the Institute for
- >Advanced Study in Princeton, writes; "the dark matter problem may be a
- >sign that some fundamental aspect of physics, such as the theory of
- >gravity, demands revision."
- > A statement such as this, tends to heighten ones interest and
- >thirst for follow-up information....which of course, I'm hoping someone
- >"out there" can supply reference to. Has anyone seen published information on
- > current trends in gravity theory, from books, periodicals, journals or
- >letters? Any help would be greatly appreciated.
- >Thanks in advance....
- >
- >Steve Warner Swarner.@bbs1984.chi.il.us
- >------------------------------------------
- >Get your facts ft, and then you can distort
- >them as much as you please. -Mark Twain-
-
- Dark matter is now a very hot field, so you're not likely to find any correct
- books out there. The COBE measurement announced last year sent all the
- theorists back to the drawing board. The latest theory people are playing
- with is a mixture of cold, hot and baryonic dark matter, with contributions
- of around 60%, 30%, and 10%, respectively. Much of the research is still
- underway, so it won't be published for several months. Watch for Ma &
- Bertschinger, and Klypin, Holzmann, Primack, & Regos, both in the
- Astrophysical Journal (KHPR is further along now).
-
- The competing theory is called "Tilted CDM," and it comes from mucking around
- with the inflation potential. The COBE group likes this one (though I'm not
- sure offhand if Smoot et al talks about this).
-
- You might wish to get started by looking for a review article in Annual
- Reviews of Astronomy and Astrophysics. That should give you background, and
- then you can attack the Citation Index. Good places to look for other
- references are Monthly Notices of the Royal Astronomical Society and Physical
- Review D. Be *very* careful to take statements about why CDM is better than
- HDM with a grain of salt. You can find the original minimal CDM theory in
- books -- my favorites are Kolb & Turner and Linde -- but be wary of old
- information.
-
- There was a lot of talk on this topic in the Texas/PASCOS meeting in Berkeley
- last week, so the meeting proceedings might be useful. However, it takes lots
- of months for these things to get published.
-
- Good luck.
-
- Mike Gross
- Physics Board
- Univ of California GO SLUGS!!!!!!
- Santa Cruz, CA 95064
- gross@lick.ucsc.edu
-