9–15 Oct 2022
Africa/Johannesburg timezone

Detection forecasts for annihilating DM in M31 and M33 galaxies with the Cherenkov Telescope Array

12 Oct 2022, 14:15
15m
Contributed Talk Parallel 7

Speaker

Miltiadis Michailidis

Description

M31 and M33 are the closest spiral galaxies and the largest members (together with the Milky Way) of the Local group, which makes them interesting targets for indirect dark matter searches. In this paper we present studies of the expected sensitivity of the Cherenkov Telescope Array (CTA) to an annihilation signal from weakly interacting massive particles from M31 and M33. We show that a 100 h long observation campaign will allow CTA to probe annihilation cross-sections up to συ51025 cm3s1 for the τ+τ annihilation channel (for M31, at a DM mass of 0.3 TeV), improving the current limits derived by HAWC by up to an order of magnitude.
We present a robust estimate of the expected CTA sensitivity, by also taking into account the contributions of the astrophysical background and other possible sources of systematic uncertainty.
We show that CTA might be able to detect the extended emission from the bulge of M31, detected at lower energies by the Fermi/LAT.

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Primary authors

Miltiadis Michailidis Lorenzo Marafatto (SIF italian physics society) Denys Malyshev (Tubingen University) Fabio Iocco (Università di Napoli "Federico II") Gabrijela Zaharijas (University of Nova Gorica)

Co-authors

Olga Sergijenko (Ivan Franko National University of Lviv) Dr Maria Isabel Bernardos (Dipartimento di Fisica e Astronomia dell?Università and Sezione INFN, Padova, Italy) Christopher Eckner (University of Nova Gorica) Alexey Boyarsky (Leiden University (NL)) Anastasia Sokolenko Andrea Santangelo

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