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Annihilating Dark Matter Search with 12 Years of Fermi LAT Data in Nearby Galaxy Clusters

by C. Thorpe-Morgan, D. Malyshev, C-A. Stegen, A. Santangelo, J. Jochum

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Submission summary

Authors (as registered SciPost users): Andrea Santangelo · Charles Thorpe-Morgan
Submission information
Preprint Link: scipost_202210_00037v1  (pdf)
Date accepted: 2023-04-28
Date submitted: 2022-10-04 11:01
Submitted by: Thorpe-Morgan, Charles
Submitted to: SciPost Physics Proceedings
Proceedings issue: 14th International Conference on Identification of Dark Matter (IDM2022)
Ontological classification
Academic field: Astronomy
  • High Energy Astrophysical Phenomena


Galaxy clusters contain an abundance of dark matter making them attractive laboratories for indirect DM searches. This work details a search for signals of pair annihilation from WIMP dark matter in the GeV gamma ray regime in five low z and high galactic latitude galaxy clusters (Centaurus, Coma, Virgo, Perseus and Fornax); undertaken using nearly 12 years of Fermi/LAT data. Through the non-detection of this characteristic signal, we derive constraints on the annihilation cross-section of DM pair annihilation into the b b, W +W − and γγ channels. The limits obtained are of a comparable magnitude to those of recently derived from Fermi/LAT observations of dwarf spheroidal galaxies.

Published as SciPost Phys. Proc. 12, 071 (2023)

Reports on this Submission

Anonymous Report 1 on 2022-10-22 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:scipost_202210_00037v1, delivered 2022-10-22, doi: 10.21468/SciPost.Report.5955


1. The paper tries to derive limits on WIMP-scale DM annihilations, based on gamma-ray observations from galaxy clusters.

2. While the derived limits are relatively weak, this is independent, and thus appealing for velocity-dependent annihilations.


There are typos, such as "In addition to to", "the best strongest limits", and "we also adopt a ... and followed ...", that need to be corrected in later editing.


The submission is clearly written to demonstrate the method, as well as the results. It does meet the criteria of SciPost Physics Proceedings, and should be accepted for publication.

  • validity: high
  • significance: high
  • originality: high
  • clarity: top
  • formatting: excellent
  • grammar: good

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