There are many papers about the Galaxy radial velocity distribution.

And the data is used for explaining the Dark Matter existence.

Then, How about the gravity distribution of the our Galaxy?

In the solar system almost all of the gravity is concentrated on the Sun.

As I recall the dark matter in our galaxy is distributed rather uniformly in a spherical shape centered on the center of our galaxy. Does anyone believe dark matter in our galaxy clumps around massive objects, like stars, black holes, and even planets?

Then the gravity distribution is the same as the Earth pattern?

Near the center area the difference of the radial velocity distribution is very big.

Does it have any relationship to the gravity?

Spherical shape but center region radial velocity difference is very big.

What's the problem?

Edited January 3, 201115 yr by alpha2cen

"This illustration shows the visible Milky Way galaxy surrounded by a “squashed beachball”-shaped dark matter halo." Source: UCLA

http://www.universetoday.com/49619/milky-way-has-a-squashed-beachball-shaped-dark-matter-halo/

 

We didn't mean the Dark Matter concept is not right.

The one we'd like to know is the gravity distribution of the Milky way by using Dark Matter concept.

And, how to we calculate the radial velocity distribution form the Dark Matter model?

Which Dark Matter parameter was estimated from the radial velocity distribution of the Milky way?