The origin of the Bar of stars that passes through the Galactic centre is difficult to connect to the merger process in the Standard Model. Yet most galaxies have this feature as a huge line of stars stretching across the Bulge and passing through the vicinity of the central SM Black Hole.

Any relationship between this bar and the galaxy core is destructive as the movement of stars will be generally inward. This requires the replacement of matter at the outer edge of the Bar, to remain an unbroken line, which is a scenario that appears unlikely.

Matter forming the Bar must be moving (in association with the Galaxy Core) one of three ways; falling in, maintaining the same distance or moving away.

Falling in is unlikely, so is retaining the same distance, as the powerful gravity of the central object will attract matter, in both cases, destroying the Bar and so won’t be continuous across the Bulge.

The only scenario that fits is outward drift from the midpoint. This will give the Bar the correct construction and helps to explain the two Spiral Arms that connect to either end. If the general movement is away from the Galaxy Centre the Bar becomes the Spiral Arms once leaving the Bulge. When the rotation of the Galaxy is unwound the Spiral Arms and bar will form one continuous stream of matter from galactic centre to dark halo.

In this model the Bar is formed at the Galactic centre by two huge jets of matter from the equator not the poles (which is not possible with a Black Hole). In fact many features are better explained, through the outward drift of stars, right across the Galaxy. Like a correlation in mass of the Galaxy with the central object; the often symmetrical and circular nature of galaxies, the general association between galaxies sizes called Freeman’s Law and stars within the Galaxy that generally seem to be moving away from the core.

            SM object in Galaxy centre connection to jetting from poles and equator.
Categorising this as a SM Black Hole suggests it should have a huge accretion disc, be very bright in the x-ray and flare as whole stars are accreted. It has none of these characteristics but is generally dull, discreet and mysterious.There are Black Holes of very large size called quasars which are the brightest objects in the Universe, which should associate in characteristics, that description will not fit Sgr A*.

The adoption of the central object as a Black Hole is partly because there’s nothing else it could be - which is not totally true. In the same place Black Holes are described (Relativity) also suggest an associated object of unknown properties called a White Hole. If this is a White Hole it would link the evolution of Galaxies to Relativity and not haphazard and unlikely merger in the Standard Model.