|Jul9-12, 11:50 AM||#1|
Dark Matter - How strong is it at a galaxy periphery?
How strong is the influence of dark matter typically at the periphery (50.000 LY away from the center) for example in the Milky Way
I mean is the Acceleration Due to Gravity (due to dark matter) (typically) 80% - 85% - 90% - 95 % - or 97% stronger as the Acceleration Due to Gravity caused by visible matter.
|Jul10-12, 01:30 PM||#2|
Here is a website I found which discusses this. v^2 is proportional to the mass inside divided by the radius, and the mass inside is proportinal to the gravitational force and the stars acceleration due to gravity.
1pc = 3,3 ly.
Compared to the Milky Way, other galaxies are easier to observe, but I think the situation is similar here. At ~50kly, dark and visible matter have a similar influence, further away from the center dark matter dominates - the presented fit indicates a distribution of 25%/75% at 50kpc.
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