21-23 December 2020
Online meeting
Europe/Kiev timezone

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

22 Dec 2020, 10:30
Online meeting

Online meeting

Oral talk Astrophysics and Cosmology Astrophysics and Cosmology


Charles Thorpe-Morgan (Institut für Astronomie und Astrophysik - University of Tübingen)


Galaxy clusters are the largest virialised objects in the Universe, and as such, have a high dark matter (DM) concentration. This abundance of dark matter makes them promising targets for indirect DM searches. Here we report the details of a search, utilising almost 12 years of Fermi/LAT data, for gamma ray signatures from the pair annihilation of WIMP dark matter in the GeV energy band. From this, we present the constraints on the annihilation cross section for the bb, W+W- and γγ channels,derived from the non-detection of a characteristic signal from five nearby high galactic latitude galaxy clusters (Centaurus, Coma, Virgo, Perseus and Fornax). We discuss the potential of a boost to the signal due the presence of substructures in the DM halos of selected objects, as well as the impact of uncertainties in DM profiles on the presented results. We assert that the obtained limits are, within a small factor, comparable to the best available limits of those based on Fermi/LAT observations of dwarf spheroidal galaxies.

Primary author

Charles Thorpe-Morgan (Institut für Astronomie und Astrophysik - University of Tübingen)


Dr Denys Malyshev (IAAT- University of Tübingen) Mr Christoph-Alexander Stegen (IAAT - University of Tübingen ) Prof. Andrea Santangelo (IAAT- University of Tübingen) Prof. Josef Jochum (University of Tübingen )

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