Mapping dark matter in the Milky Way

Abstract

Mapping the dark matter distribution across our Galaxy represents a central challenge for the near future as a new generation of space-borne and ground-based astronomical surveys swiftly comes online. Here we present a synopsis of the present status of the field, reviewing briefly the baryonic content and the kinematics of the Milky Way and outlining the methods used to infer the dark matter component. The discussion then proceeds with some of the latest developments based on our own work. In particular, we present a new compilation of kinematic measurements tracing the rotation curve of the Galaxy and an exhaustive array of observation-based baryonic models setting the contribution of stellar bulge, stellar disc and gas to the total gravitational potential. The discrepancy between these two components is then quantified to derive the latest constraints on the dark matter distribution and on modified Newtonian dynamics. We shall end with an overview of future directions to improve our mapping of the dark matter distribution in the Milky Way.

Fate of an accretion disc around a black hole when both the viscosity and dark energy is in effect

“…Besides we will like to mention again Ref. [54] where the presence of the dark matter or, more broadly, exotic matters can be found near the central regions of a galaxy. Now as the accretion rates are very prominent there, we can take our results to be a better modelling of dark energy accretion with a viscous nature towards a black hole.…”

Dark Matter in γ lines: Galactic Center vs. dwarf galaxies

“…However, precise agreement on the above quantities is still lacking, for recent studies see e.g. [51][52][53] for ρ , and [53][54][55][56] for the DM mass within a given radius. The purpose of this study is not to quantify the impact of the latter uncertainties, so we remain for definiteness with the procedure of [42], fitting the profiles of eqs.…”