On Tuesday, 31 March 2015 01:28:57 UTC+1, Craig Markwardt wrote:
On Wednesday, March 25, 2015 at 5:00:34 AM UTC-4, Jan Panteltje wrote:

not whole stars ejected from a black hole.

If 'black holes' exist or not, apart from the purely theoretical fact
that nothing can escape when escape velocity is greater than C,
the 'inner part' of galaxies often looks like a bar, where the ends leave a trace of stars
while it (the bar) rotates, that trace being the spiral arms.
I think the processes at the center of a galaxy (this galaxy) are far more complicated
than just 'black hole'.

I think that's quite true, but I also don't think you will find anybody in astronomy who claims that galactic dynamics are "just black hole."

You claimed that the paper supported your idea that stars were being "spit out" by a black hole. But in fact the paper showed that what was happening was star formation from gas, not stars being spit out.


Also, the orbits of stars =
around Sgr A* have been measured and they are pretty normal Keplerian ellipses,

It is funny, as observations of the orbits of stars in galaxies has shown that those are indeed not 'in orbit'
as in the sense of Newtonian orbit, and that caused people to come up with MOND,
dark matter, and what not.

Please don't confuse the issue. The stars in orbit within a few hundred AU of Sgr A* are dominated by the gravity of a single compact (but invisible object). This is evident because the detailed orbits of individual stars can be measured, and they are consistent with a central point mass of ~4 million solar masses. And they are closed, non-escaping, elliptical orbits. No sprinkler hose.

Its absurd to suggest that just because you cant do an n3 body calculation
for all the stars/mass in the central halo (assuming no central BH). That
somehow this can only mean that the only correct calculation is a keplerian
one assuming a centrally located (Black hole) mass. That's not logical.
Not being able to do a calculation does not invalidate its potential
conclusion.
I have seen simulations of n body calculations where n3 and although crude
in their limitations they do show orbits near the center that appear elliptical.