Why do metal poor stars have the most elliptical orbits

Hi webweaverlady!
Apparently, metal-poor stars are the oldest ones:

"Walter Baade in 1944 finds stars fall into two basic groups: Young,
metal-rich stars (Pop. I) and old, metal-poor stars (Pop. II)...

"Population II--in spheroidal component (halo, bulge); [...] [have]
little overall rotation--stars have large random velocities with
highly elliptical orbits"

Galaxies
http://www.maa.mhn.de/Scholar/galaxies.html

Also, it has been observed that "...Population II stars (those in the
halo) have a spherical distribution and very elliptical orbits because
they formed during the time of inward fall of material."
http://www.missouri.edu/~physwww/astronomy_one/html/milky_way_galaxy.html

For more information, check:

Interstellar medium and the Mily Way
http://www.astronomynotes.com/ismnotes/s9.htm

Google search strategy:
"very elliptical orbits" metal poor stars


I hope this helps! If you have any doubt regarding my answer, please
don't hesitate to request a clarification.

Best wishes!
elmarto

Yes - this helps alot!!!! Thank you very much!