PreprintCC BY 4.0arXiv
Comment on "Fermi-LAT Galactic Center Excess Morphology of Dark Matter in Simulations of the Milky Way Galaxy"
Abstract
Muru et al. [Phys. Rev. Lett. 135, 161005 (2025)] conclude from the HESTIA constrained simulations that the γ-ray morphologies of the Galactic Center Excess predicted by dark matter annihilation and by an old stellar population are essentially indistinguishable. Their "quadratic dark matter" maps, however, show the square of the mass projected along the line of sight, [∫ρ s2 ds]2, rather than the annihilation integral ∫ρ2 ds. Squaring a nonnegative map preserves its isophote shapes at corresponding intensity levels, as confirmed by the reported contour axis ratios. The corrected calculation on the same simulations does not support their conclusion.
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BibTeX
@misc{abazajian2026comment,
title = {{Comment on "Fermi-LAT Galactic Center Excess Morphology of Dark Matter in Simulations of the Milky Way Galaxy"}},
author = {Kevork N. Abazajian and Jason Kumar and Oscar Macias},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.34155},
eprint = {2609.34155},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.34155},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Comment on "Fermi-LAT Galactic Center Excess Morphology of Dark Matter in Simulations of the Milky Way Galaxy"
AU - Kevork N. Abazajian
AU - Jason Kumar
AU - Oscar Macias
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.34155
UR - https://arxiv.org/abs/2609.34155
AB - Muru et al. [Phys. Rev. Lett. 135, 161005 (2025)] conclude from the HESTIA constrained simulations that the γ-ray morphologies of the Galactic Center Excess predicted by dark matter annihilation and by an old stellar population are essentially indistinguishable. Their "quadratic dark matter" maps, however, show the square of the mass projected along the line of sight, [∫ρ s^2 ds]^2, rather than the annihilation integral ∫ρ^2 ds. Squaring a nonnegative map preserves its isophote shapes at corresponding intensity levels, as confirmed by the reported contour axis ratios. The corrected calculation on the same simulations does not support their conclusion.
ER -