Probing Brownstein-Moffat Gravity via Numerical Simulations

Details Probing Brownstein-Moffat Gravity via Numerical Simulations Probing Brownstein-Moffat Gravity via Numerical Simulations

2010-06-04

arxiv.org/abs/1006.1000v1

ApJ v717 p849 (2010)

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

33 pages and 14 figures - To appear in The Astrophysical Journal

Scientific paper

10.1088/0004-637X/717/2/849

In the standard scenario of the Newtonian gravity, a late-type galaxy (i.e., a spiral galaxy) is well described by a disk and a bulge embedded in a halo mainly composed by dark matter. In Brownstein-Moffat gravity, there is a claim that late-type galaxy systems would not need to have halos, avoiding as a result the dark matter problem, i.e., a modified gravity (non-Newtonian) would account for the galactic structure with no need of dark matter. In the present paper, we probe this claim via numerical simulations. Instead of using a "static galaxy," where the centrifugal equilibrium is usually adopted, we probe the Brownstein-Moffat gravity dynamically via numerical $N$-body simulations.

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