Tachyonic models of dark matter

TL;DR

This paper proposes a model where tachyonic matter flows around black holes in General Relativity, creating gravitational effects similar to dark matter halos and explaining flat galactic rotation curves.

Contribution

It introduces a novel tachyonic matter flow model in General Relativity that reproduces dark matter effects without requiring new particles.

Findings

Tachyonic flows around black holes can mimic dark matter halos.

The model reproduces flat galactic rotation curves.

Gravitational effects match observations in the weak field limit.

Abstract

We consider a spherically symmetric stationary problem in General Relativity, including a black hole, inflow of normal and tachyonic matter and outflow of tachyonic matter. Computations in a weak field limit show that the resulting concentration of matter around the black hole leads to gravitational effects equivalent to those associated with dark matter halo. In particular, the model reproduces asymptotically constant galactic rotation curves, if the tachyonic flows of the central supermassive black hole in the galaxy are considered as a main contribution.