Growth in Galaxies from the center.



 Bar of Stars in Galaxy formation and connection to spiral arms in growth.

Some processes in Galaxy evolution suggests a general movement of stars, like in the Bar, as away from the Core in spiraling orbit. This suggests the Bar is produced by the expelling of matter or outflow, that forge stars, from around the Central Object in two continuous jet like structures. 
As I have suggested ( see -The Bar of stars and the Spiral Arms in Galaxy Evolution.) the Bar and the Spiral Arms are connected physically and may be the same structure as matter migrates from the Bar to become a spiral outside the Bulge as the same double jet.


APOGEE observations have measured the velocities for nearly 5,000 stars near the Galactic centre. With these velocities they assembled a picture of how these stars orbit the centre of the Milky Way. However, quite unexpectedly, they found that a substantial amount of stars in the inner Galaxy associated with the Bar are moving away from us quickly.
This may be evidence for outward spiraling.

Fast outward movement of stars from galaxy centre in the Bar and direct connection with central object.