A Phase Space Diagram for Gravity

作者：Hernandez Xavier^*

来源：Entropy, 2012, 14(5): 848-855.

DOI：10.3390/e14050848

• modified theories of gravity
• dark energy
• cosmology

In modified theories of gravity including a critical acceleration scale a(0), a critical length scale r(M) = (GM/a(0))(1/2) will naturally arise with the transition from the Newtonian to the dark matter mimicking regime occurring for systems larger than r(M). This adds a second critical scale to gravity, in addition to the one introduced by the criterion upsilon %26lt; c of the Schwarzschild radius, r(S) = 2GM/c(2). The distinct dependencies of the two above length scales give rise to non-trivial phenomenology in the (mass, length) plane for astrophysical structures, which we explore here. Surprisingly, extrapolation to atomic scales suggests gravity should be at the dark matter mimicking regime there.

• 出版日期2012-5