The mass, spin and rotational energy of the remnant black holes from compact binary mergers

TL;DR

This paper introduces unified models to accurately predict the final mass, spin, and rotational energy of black hole remnants from compact binary mergers, aiding in understanding their astrophysical and electromagnetic signatures.

Contribution

The paper presents novel unified models for predicting remnant black hole properties, including rotational energy, with high accuracy across relevant parameters.

Findings

Models achieve good accuracy in predictions.

Rotational energy distribution varies by merger type.

Characteristics of rotational energy may help identify electromagnetic counterparts.

Abstract

Recently, many gravitational wave events from compact binary mergers have been detected by LIGO. Determining the final mass and spin of the remnant black holes (RBHs) is a fundamental issue and is also important in astrophysics. In this paper, unified models for predicting the final mass and spin of the RBHs from compact binary mergers is proposed. The models achieve a good accuracy within the parameter range of interest. In addition, the rotational energy of the RBHs is also studied which is relevant to the electromagnetic counterparts of the mergers. It is found the distribution of the rotational energy of the RBHs from different types of mergers of compact binary has its own characteristics, which might help identify the electromagnetic counterparts associated with the mergers.