home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!uwm.edu!ogicse!news.u.washington.edu!stein.u.washington.edu!strobel
- From: strobel@stein.u.washington.edu (Nicolas Strobel)
- Newsgroups: sci.physics
- Subject: collision times in differentially rotating disk
- Summary: derivation of collision rates in galactic disk wanted
- Keywords: galaxy disk collisions
- Message-ID: <1ivcbmINNs9t@shelley.u.washington.edu>
- Date: 12 Jan 93 21:14:30 GMT
- Article-I.D.: shelley.1ivcbmINNs9t
- Organization: University of Washington
- Lines: 15
- NNTP-Posting-Host: stein.u.washington.edu
-
-
- Can anyone give me a derivation of the timescale between collisions of
- objects in the slightly less trivial case of a rotating galactic disk?
- I know the timescales for a spherically distributed system with no net
- rotation. The case of a flattened system whose rotation tends to keep
- objects from colliding as frequently as if there was no rotation should
- be a little trickier to find. The particular case I'm interested in is
- one for a flat rotation curve galactic disk with a given velocity
- dispersion ellipsoid (or epicyclic frequencies).
-
- Please email. If there is interest, I'll post what answers I receive.
-
- Thanks
- Nick Strobel
- strobel@dirac.phys.washington.edu
-