RT Journal Article
T1 Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
A1 Alvarez-Crespo, N.
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Láinez, M.
A1 López Moya, Marcos
A1 Martinez, O.
A1 Mas-Aguilar, A.
A1 Miener, Tjark
A1 Miranda, J.M.
A1 Morcuende Parrilla, Daniel
A1 Nieto Castaño, Daniel
A1 Rosado Vélez, Jaime
A1 Sinha, Atreyee
A1 Tejedor Álvarez, Luis Ángel
A1 Zamanillo, V.M.
AB Galaxy clusters are expected to be both dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster’s formation history. Accordingly, they are excellent targets to search for signals of DM annihilation and decay at γ-ray energies and are predicted to be sources of large-scale γ-ray emission due to hadronic interactions in the intracluster medium (ICM). In this paper, we estimate the sensitivity of the Cherenkov Telescope Array (CTA) to detect diffuse γ-ray emission from the Perseus galaxy cluster. We first perform a detailed spatial and spectral modelling of the expected signal for both the DM and the CRp components. For each case, we compute the expected CTA sensitivity accounting for the CTA instrument response functions. The CTA observing strategy of the Perseus cluster is also discussed. In the absence of a diffuse signal (non-detection), CTA should constrain the CRp to thermal energy ratio X500 within the characteristic radius R500 down to about X500 < 3 × 10−3, for a spatial CRp distribution that follows the thermal gas and a CRp spectral index αCRp = 2.3. Under the optimistic assumption of a pure hadronic origin of the Perseus radio mini-halo and depending on the assumed magnetic field profile, CTA should measure αCRp down to about ∆αCRp ≃ 0.1 and the CRp spatial distribution with 10% precision, respectively. Regarding DM, CTA should improve the current ground-based γ-ray DM limits from clusters observations on the velocity-averaged annihilation cross-section by a factor of up to ∼ 5, depending on the modelling of DM halo substructure. In the case of decay of DM particles, CTA will explore a new region of the parameter space, reaching models with τχ > 1027 s for DM masses above 1 TeV. These constraints will provide unprecedented sensitivity to the physics of both CRp acceleration and transport at cluster scale and to TeV DM particle models, especially in the decay scenario.
PB IOP Publishing
YR 2024
FD 2024-10-01
LK https://hdl.handle.net/20.500.14352/135181
UL https://hdl.handle.net/20.500.14352/135181
LA eng
NO Abe, K., et al. «Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array». Journal of Cosmology and Astroparticle Physics, vol. 2024, n.o 10, octubre de 2024, p. 004. DOI.org (Crossref), https://doi.org/10.1088/1475-7516/2024/10/004.
NO Firman 264 autores.Centro de Excelencia Severo Ochoa (SEV-2017-0709, CEX2019-000920-S, CEX2020-001007-S,  SEV-2016-0597-17-2)Unidad de Excelencia María de Maeztu (CEX2019-000918-M, CEX2020-001058-M)Ramón y Cajal (RYC-2017-22665)Juan de la Cierva-Incorporación ( IJC2018-037195-I, IJC2019-040315-I)Beca Postdoctorado La Caixa (LCF/BQ/PI21/11830030)
NO State Committee of Science of Armenia
NO Australian Research Council
NO Astronomy Australia Limited
NO The University of Adelaide
NO Australian National University
NO Monash University
NO The University of New South Wales
NO The University of Sydney
NO Western Sydney University
NO Federal Ministry of Education, Science and Research, and Innsbruck University (Austria)
NO Consejo Nacional de Desarrollo Científico y Tecnológico (Brasil)
NO Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
NO Fundação de Amparo à Pesquisa do Estado de São Paulo
NO Fundação de Apoio à Ciência, Tecnologia e Inovação do Paraná — Fundação Araucária
NO Ministerio de Ciencia, Tecnología e Innovación (Brasil)
NO Ministerio de Educación y Ciencia (Bulgaria)
NO The Natural Sciences and Engineering Research Council of Canada
NO Canadian Space Agency
NO Comisión Nacional de Investigación Científica y Tecnológica (Chile)
NO Fondo Nacional de Desarrollo Científico y Tecnológico (Chile)
NO Croatian Science Foundation
NO Rudjer Boskovic Institute
NO University of Osijek
NO University of Rijeka
NO University of Split
NO University of Zagreb
NO Ministerio de Educación, Juventud y Deporte (República Checa)
NO Academy of Finland
NO Regional Council Ile de France
NO Ministère de l’Enseignement supérieur et de la Recherche (France)
NO Centre National de la Recherche Scientifique (France)
NO Agence Nationale de la Recherche (France)
NO Max Planck Society
NO Federal Ministry of Education and Research (Germany)
NO Deutsches Elektronen-Synchrotron
NO Helmholtz Association
NO TU Dortmunt University
NO Department of Atomic Energy (India)
NO Department of Science and Technology (India)
NO Istituto Nazionale di Astrofisica
NO Istituto Nazionale di Fisica Nucleare
NO Ministero dell'Istruzione, dell'Università e della Ricerca
NO University of Tokyo
NO Japan Society for the Promotion of Science
NO Ministry of Education, Culture, Sports, Science and Technology (Japan)
NO Netherlands Research School for Astronomy
NO Netherlands Organization for Scientific Research
NO University of Oslo
NO Ministry of Science and Higher Education (Poland)
NO National Centre for Research and Development and the National Science Centre (Poland)
NO Slovenian Research Agency
NO Ministerio de Ciencia e Innovación (España)
NO Fundación La Caixa
NO Junta de Andalucía
NO Universidad de Jaén
NO Gobierno de Canarias
NO Generalitat de Catalunya
NO European Commission
NO Swedish Research Council
NO Royal Physiographic Society of Lund
NO Royal Swedish Academy of Sciences
NO The Swedish National Infrastructure for Computing
NO State Secretariat for Education, Research and Innovation  (Switzerland)
NO Swiss National Science Foundation
NO Durham University
NO Leverhulme Trust
NO Liverpool University
NO University of Leicester
NO University of Oxford
NO Royal Society (UK)
NO , Science and Technology Facilities Council (UK)
NO National Science Foundation (US)
NO Department of Energy (US)
NO Argonne National Laboratory
NO Barnard College
NO University of California
NO University of Chicago
NO Columbia University
NO Georgia Institute of Technology
NO Institute for Nuclear and Particle Astrophysics
NO Iowa State University
NO Smithsonian Institution
NO Washington University McDonnell Center for the Space Sciences
NO The University of Wisconsin
NO Wisconsin Alumni Research Foundation
NO Comunidad de Madrid
DS Docta Complutense
RD 30 abr 2026