A Brief Review of Binary Driven Hypernova

TL;DR

The paper reviews the development and current status of the binary driven hypernova (BdHN) model, which explains long gamma-ray bursts through binary systems involving a CO core and a neutron star or black hole, integrating observational data and theoretical advances.

Contribution

It provides a comprehensive summary of the BdHN model's structure, physical processes, and classification scheme, highlighting its improvements over previous models and its success in explaining GRB observations.

Findings

BdHN model successfully explains all long GRB observables.

Refined classification of long GRBs based on progenitor properties.

Nearly complete theoretical framework for long GRBs within the BdHN model.

Abstract

Binary driven hypernova (BdHN) models long gamma-ray burst (GRBs) as occurring in the binary systems involving a carbon-oxygen core (CO$_{\rm core}$) and a companion neutron star (NS) or a black hole (BH). This model, first proposed in 2012, succeeds and improves upon the fireshell model and the induced gravitational collapse (IGC) paradigm. After nearly a decade of development, the BdHN model has reached a nearly complete structure, explaining all the observables of long bursts into its theoretical framework, and has given a refined classification of long GRBs according to the original properties of the progenitors. In this article, we present a summary of the BdHN model and the physical processes at work in each of the envisaged Episodes during its occurrence and lifetime, duly contextualized in the framework of GRB observations.