TITLE:
Dark Matter Distribution in the Vicinity of Stars
AUTHORS:
Daniel E. Friedmann
KEYWORDS:
Galaxy: Structure—Solar Neighborhood, Galaxies: Dark Matter, Mass and Mass Distribution, Kinematics and Dynamics
JOURNAL NAME:
Open Access Library Journal,
Vol.3 No.3,
March
3,
2016
ABSTRACT: It is generally accepted that dark matter must be found throughout
galaxies. The observed motion of stars demands that galaxies contain large
amounts of dark matter distributed throughout according to a particular density
function. However, it is argued in this paper that this assumed density
function should apply to all matter in the galaxy, not just dark matter. This
paper reasons that in a region where a strong concentration of visible matter
is observed, an absence of dark matter ought to be expected. In particular,
calculations show that the dark matter density in the expanded solar
neighbourhood (a kiloparsec radial extent from the Sun) should be as expected,
in agreement with kinematic measurements; however, the immediate solar
neighbourhood (within a few parsecs radial extent from the Sun) should be
mostly devoid of dark matter, in accordance with the lack of success in finding
dark matter using direct detection experiments on Earth.