Contribution of Stellar Flares to the Diffuse Component of Galactic Gamma-Rays

TL;DR

This paper estimates how stellar flares contribute to the low-energy diffuse gamma-ray background in our galaxy, considering the cosmic rays produced by these flares and their potential impact on observed gamma-ray spectra.

Contribution

It introduces a method to quantify the contribution of stellar flares to galactic diffuse gamma-rays, focusing on cosmic rays from flares in the 100 MeV to 1 TeV range.

Findings

Stellar flares can significantly contribute to the low-energy diffuse gamma-ray component.

The cosmic rays from flares have a power-law spectrum with gamma=-3.75.

Flares may account for a notable fraction of the observed diffuse gamma-ray background.

Abstract

It is well known that the diffuse gamma-rays are produced by the collisions between the galactic cosmic rays with the stellar matter (Hayakawa-Morrison Hypothesis). In this paper the author tries to estimate the contribution of star flares in the low energy component of the diffuse component of the galactic gamma-rays. It is expected that high energy part of the disuse component of the galactic gamma-rays reflects the power spectrum of galactic cosmic rays with gamma= -2.75 (in differential). In the galactic disk and bulge, there are more than 100 billion stars. They might often make flare and produce high energy cosmic rays by the flare in the energy range from 100 MeV to 1 TeV with the power index gamma= -3.75 (in differential). In this paper the author tries to estimate the contribution of the star flares to the diffuse component of gamma-rays.