Cause of Spiral Galaxy Rotation Rates: a Massive Graviton

Details Cause of Spiral Galaxy Rotation Rates: a Massive Graviton Cause of Spiral Galaxy Rotation Rates: a Massive Graviton

2011-10-17

arxiv.org/abs/1110.3697v1

ApJL, 741, L31 (2011)

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in ApJ Letters

Scientific paper

We attribute the observed rotational velocity profiles of spiral galaxy disks to a combination of Newtonian and exponential gravitational potentials. We offer a novel, yet perfectly plausible, Lagrangian from which the exponential potential is derived. The exponential potential is defined by two universal constants (corresponding to a coupling constant and a graviton mass) that we determine from our sample of 12 THINGS disks. All velocity profile fits are excellent.

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