Astrophysical Accretion as an Analogue Gravity Phenomena

Understand

In recent years, strong analogies have been established between the physics of acoustic perturbations in an inhomogeneous dynamical fluid system, and some kinematic features of space-time in general relativity.

• An effective metric, referred to as the `acoustic metric', which describes the geometry of the manifold in which acoustic perturbations propagate, can be constructed.
• This effective geometry can capture the properties of curved space-time in general relativity.
• Physical models constructed utilizing such analogies are called `analogue gravity models'.