Sensitivity of CTA to gamma-ray emission from the Perseus galaxy cluster

Judit Pérez-Romero, H. Abdalla, C. Carlile, D. Dravins, A. Zmija, The CTA Consortium

    Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

    Abstract

    In these proceedings we summarize the current status of the study of the sensitivity of the Cherenkov Telescope Array (CTA) to detect diffuse gamma-ray emission from the Perseus galaxy cluster. Gamma-ray emission is expected in galaxy clusters both from interactions of cosmic rays (CR) with the intra-cluster medium, or as a product of annihilation or decay of dark matter (DM) particles in case they are weakly interactive massive particles (WIMPs). The observation of Perseus constitutes one of the Key Science Projects to be carried out by the CTA Consortium. In this contribution, we focus on the DM-induced component of the flux. Our DM modelling includes the substructures we expect in the main halo which will boost the annihilation signal significantly. We adopt an ON/OFF observation strategy and simulate the expected gamma-ray signals. Finally we compute the expected CTA sensitivity using a likelihood maximization analysis including the most recent CTA instrument response functions. In absence of signal, we show that CTA will allow us to provide stringent and competitive constraints on TeV DM, especially for the case of DM decay. © Copyright owned by the author(s) under the terms of the Creative Commons.
    Original languageEnglish
    Title of host publication37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
    Volume395
    DOIs
    Publication statusPublished - 2022
    Event37th International Cosmic Ray Conference - Online, Berlin, Germany
    Duration: 2021 Jul 122021 Jul 23
    Conference number: 37

    Publication series

    NameProceedings of Science
    PublisherSissa Medialab Srl
    ISSN (Print)1824-8039

    Conference

    Conference37th International Cosmic Ray Conference
    Abbreviated titleICRC2021
    Country/TerritoryGermany
    CityBerlin
    Period2021/07/122021/07/23

    Subject classification (UKÄ)

    • Astronomy, Astrophysics and Cosmology

    Free keywords

    • Cosmic rays
    • Cosmology
    • Galaxies
    • Gamma rays
    • Tellurium compounds
    • Cherenkov telescope arrays
    • Current status
    • Dark matter
    • Dark matter particles
    • Galaxies clusters
    • Gamma-ray emission
    • Induced component
    • Intracluster medium
    • Massive particles
    • Science projects
    • Annihilation

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