Mass loss and longevity of gravitationally bound oscillating scalar lumps (oscillatons) in D-dimensions

Understand

Spherically symmetric oscillatons (also referred to as oscillating soliton stars) i.e.

• gravitationally bound oscillating scalar lumps are considered in theories containing a massive self-interacting real scalar field coupled to Einstein's gravity in 1+D dimensional spacetimes.
• Oscillations are known to decay by emitting scalar radiation with a characteristic time scale which is, however, extremely long, it can be comparable even to the lifetime of our universe.
• In the limit when the central density (or amplitude) of the oscillaton tends to zero (small-amplitude limit) a method is introduced to compute the transcendentally small amplitude of the outgoing waves.