Diffuse $\gamma$-ray emission in Cygnus X: Comments to Yan & Pavaskar

TL;DR

This paper addresses concerns about the diffusion coefficient calculations in a previous study of gamma-ray emission in Cygnus X, providing detailed equations and clarifying the modeling assumptions to ensure transparency and accuracy.

Contribution

The authors clarify the diffusion coefficient calculation method and explicitly describe the modeling assumptions, correcting potential misunderstandings from prior critiques.

Findings

No ad hoc parameterization used in the model

Explicit description of injection mechanisms included

Discussion on key factors affecting diffusion coefficient

Abstract

It has been pointed out in arXiv:2211.17057 that our recent (published) paper might be revised, due to an incorrect evaluation of the diffusion coefficients, $D(E)$, employed in the calculations. Unfortunately, there is no indication as to where the incorrectness might be. Here we offer the opportunity to be more specific, by providing the community with the whole description of the equations involved in the calculation of $D(E)$, which is missing in the {\tt arXiv} note. In this context, we mention that no \textit{ad hoc} parameterisation has been used in our paper. Furthermore, any assumption on the injection mechanisms is explicitly described in the paper as an input factor and is obviously part of the modelisation procedure, hence the final outcome is subject to it. Finally, we discuss in a more broad context what, in this calculation of the diffusion coefficient, we believe is the key message.