Black Hole as Galaxy Core is Super Massive Mistake.

The properties of the object in the Galaxy Centre (Sgr A*) is said to be associated with a Super Massive Black Hole. There are several likely features of a black hole in a matter rich environment like the Galaxy Centre.
1. A large accretion disc. 
It has a disc but the matter seems to be spiralling away and not inward, so no accretion and not a black hole.
2. Bright in the x-ray.
It seems remarkably dull - may be it is obscured - yet these cores are no more odious in any other galaxy. There should be comparisons to similar really big black hole like entities called quasars - the brightest objects in the Universe. These galaxy cores have no association in emissions to quasars and are as different as black and white.
3. Flare with variations in accretion.
This object appears uniformly obscure and mysterious.
4. Compact.
All black holes are fully compact - it’s part of what they are. This thing is semi-compact and so not a black hole.
5. Rotation speed.
Black holes are the product of collapse which implants rotation. This galaxy core has been difficult to determine the rotation. Some calculate this to be very rapid from the speed of material around it. I suggest it’s hardly moving and that the object, the bar of stars and the whole bulge are going around at that slow rotation.
6. Mass.
The only entity we know that can become this massive are black holes. Which assumes we know about every object in the Universe which we don’t.

One object that is theorised by relativity to be a white hole, which have unknown properties, may better describe the Central Object and associations to galaxy evolution - being connected to a black hole elsewhere. Read more at: relativegalaxy.blogspot.com

Galaxy formation by Matter Transfer

The transfer of material to the centre of the Galaxy and resulting expansion, forming the Galactic Plane, better describe galaxy evolution - giving a Relative association. Powered by a Black Hole matter transfers through space time by a physical connection to a second object theorised as a White Hole.

Material passes through a connection between the two objects in a double channel with a gravitational association (one filament rotates clockwise the other anti-clockwise using the BH rotation). Evidence for these filaments come from detecting double helix structures that criss-cross the Universe. 

The rotation of the either object twist the filaments together forming a double helix which glows due to the possible interaction with antimatter during the transportation. These filaments are gravitational in formation giving a Relative connection as only a Black Hole has the necessary force to forge them.

Antimatter arriving at the Galaxy Centre, at great speed, around the Central Object form part of the outward drift process that creates galaxies. There are two huge jets of matter that blast from the White Giant forming the Bar of stars that become the Spiral Arms as part of this outward drift process.

The Time Bridge is a double; two huge jets form the Bar, these filaments form double helix and north - south connection at the Black Hole and galaxies are formed by growth not merger.

Creation of Ring Galaxy and the general movement of Stars

 Galaxies 'die' from the centre, creating an empty space that gets bigger and bigger, suggesting the general movement of matter is away from the Core forming Ring Galaxies. Dying from the middle indicates stars are spiralling from the central object, thought to be a Super Massive Black Hole, as matter close to this thing is generally moving away. For galaxies to remain active requires stars to be replaced at the centre were matter arrives around this central object forming concentrations of stars called the Torus - making it the fulcrum of galaxy evolution. When this system fails the stars moving away are not replaced and a hole appears which gets bigger. Thus, the movement of stars across the Galactic Plane is an outward spiral.
This process is impossible to associate to a Black Hole as the Core. It’s physical properties and connection to outward drift of matter may be better associated to a different object.