$G$ Objects and primordial black holes

TL;DR

This paper proposes that $G$ objects in the Galactic Center are gas clouds bound to stellar-mass black holes formed from primordial black holes captured by neutron stars, explaining their observed properties.

Contribution

It introduces a novel model linking primordial black holes to $G$ objects, suggesting they are stellar-mass black holes with gaseous atmospheres formed via dark matter interactions.

Findings

$G$ objects can be explained as gas clouds bound to black holes.

Primordial black holes can be captured by neutron stars in the Galactic Center.

The model reproduces observed luminosities and resilience to tidal disruption.

Abstract

We suggest that "$G$ objects" recently discovered in the Galactic Center may be clouds of gas bound by the gravitational field of stellar-mass black holes produced in the interactions of sublunar primordial black holes with neutron stars. If dark matter is composed of primordial black holes with masses $(10^{-16} - 10^{-10}) M_\odot$, these black holes can be captured by neutron stars in the Galactic Center, where the dark matter density is high. After the capture, the neutron star is consumed by the black hole, resulting in a population of $(1-2) M_\odot $ black holes. These stellar-mass black holes, accompanied by gaseous atmospheres, can account for the observed properties of the $G$ objects, including their resilience to tidal disruption by the supermassive black hole in the Galactic Center while also producing emission consistent with inferred luminosities.