Axion Stars and Fast Radio Bursts

TL;DR

This paper proposes that fast radio bursts are caused by collisions between axion stars and neutron stars, linking observed frequencies and energies to axion properties and estimating axion star masses.

Contribution

It introduces a novel model connecting axion star collisions with neutron stars to explain fast radio bursts and derives related physical parameters.

Findings

FRBs originate from axion star-neutron star collisions

The model predicts burst frequencies based on axion mass

Estimated axion star mass is around 10^{-11} solar masses

Abstract

We show that fast radio bursts arise from collisions between axion stars and neutron stars. The bursts are emitted in the atmosphere of the neutron stars. The observed frequencies of the bursts are given by the axion mass $m_a$ such as $m_a/2\pi\simeq 1.4\,\mbox{GHz}\,\big(m_a/(6\times 10^{-6}\mbox{eV})\big)$. From the event rate $\sim 10^{-3}$ per year in a galaxy, we can determine the mass $\sim 10^{-11}M_{\odot}$ of the axion stars. Using these values we can explain short durations ( $\sim $ms ) and amount of radiation energies ( $\sim 10^{43}$GeV ) of the bursts.