On Wed, 19 Dec 2001, paul v****** wrote:
> Hi, PLease could you help me with a Question of Black Hole
> classification? Galaxies are classed by Hubble,according to their
> Shape's.
> Could the evolution of Galaxies be infact an evolution of Black holes at
> the centre of Galaxies?
> Are Rotataing Black Holes, = to Rotating Galaxies,and likewise Spherical
> galaxies = Spherical Black Holes
> Is there an equivelence of Black Holes to Galactic Shapes? Thanks in
> advance,PV.


This is a very interesting idea.  As far as we know,
there is no such connection, however.  There are indeed
believed to be black holes at the center of many/most
galaxies.  However, the dominant force in galactic structure
and evolution is the dark matter distribution and the history
of mergers and collisions with other galaxies.  Galaxies are
mostly made of dark matter (not stars or star dust).  The dark
matter is distributed throughout the galaxy and its density does
indeed peak in the center of the galaxy.  This may be enhanced
by a black hole, but the rotation of the black hole is not a
dominant contributor to the rotation of the mass of the galaxy.

But, please keep the ideas rolling and keep watching the
press for further developments.

Scott Armel-Funkhouser
Berkeley