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Dainis Dravins

Dainis Dravins

Professor emeritus

Dainis Dravins

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

Author

  • Judit Pérez-Romero
  • H. Abdalla
  • C. Carlile
  • D. Dravins
  • A. Zmija

Summary, in English

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.

Department/s

  • Lund Observatory - Has been reorganised

Publishing year

2022

Language

English

Publication/Series

Proceedings of Science

Volume

395

Document type

Conference paper

Topic

  • Astronomy, Astrophysics and Cosmology

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

Conference name

37th International Cosmic Ray Conference

Conference date

2021-07-12 - 2021-07-23

Conference place

Berlin, Germany

Status

Published

ISBN/ISSN/Other

  • ISSN: 1824-8039