Horizon news function and quasi-local energy-momentum flux near black hole

TL;DR

This paper introduces a method to analyze quasi-local energy-momentum flux near black hole horizons using horizon news functions derived from asymptotic expansions, enhancing understanding of black hole mass change.

Contribution

It presents a novel approach to compute quasi-local energy-momentum flux near horizons through horizon news functions based on frame alignment.

Findings

Derived horizon news function from asymptotic expansion

Described gravitational flux near black holes

Linked news function to black hole mass change

Abstract

From the 'quasi-local' definition of horizons, e.g. isolated horizon and dynamical horizon, the consequence quasi-local energy-momentum near horizons can be observed by using the idea of frame alignment. In particular, we find the horizon news function from the asymptotic expansion near horizons and use this to describe the gravitational flux and change of mass of a black hole.