Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
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 pred...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/222160 |
| Acceso en línea: | https://hdl.handle.net/2445/222160 |
| Access Level: | acceso abierto |
| Palabra clave: | Astronomia de raigs gamma Cúmuls de galàxies Gamma ray astronomy Clusters of galaxies |
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Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope ArrayThe CTA ConsortiumAguasca i Cabot, ArnauBordas Coma, PolParedes i Poy, Josep MariaRibó Gomis, MarcSanuy Charles, AndreuAstronomia de raigs gammaCúmuls de galàxiesGamma ray astronomyClusters of galaxiesGalaxy 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 X <sub>500</sub> within the characteristic radius R <sub>500</sub> down to about X <sub>500</sub> < 3 × 10<sup>-3</sup>, for a spatial CRp distribution that follows the thermal gas and a CRp spectral index α<sub>CRp</sub> = 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 α<sub>CRp</sub> down to about Δα<sub>CRp</sub> ≃ 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 τ <sub>χ</sub> > 10<sup>27</sup> 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.Institute of Physics (IOP)2025202520242025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion105 p.application/pdfhttps://hdl.handle.net/2445/222160Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1088/1475-7516/2024/10/004Journal of Cosmology and Astroparticle Physics, 2024, vol. 2024, num.10https://doi.org/10.1088/1475-7516/2024/10/004cc-by (c) The CTA Consortium, 2024http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2221602026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| title |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| spellingShingle |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array The CTA Consortium Astronomia de raigs gamma Cúmuls de galàxies Gamma ray astronomy Clusters of galaxies |
| title_short |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| title_full |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| title_fullStr |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| title_full_unstemmed |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| title_sort |
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array |
| dc.creator.none.fl_str_mv |
The CTA Consortium Aguasca i Cabot, Arnau Bordas Coma, Pol Paredes i Poy, Josep Maria Ribó Gomis, Marc Sanuy Charles, Andreu |
| author |
The CTA Consortium |
| author_facet |
The CTA Consortium Aguasca i Cabot, Arnau Bordas Coma, Pol Paredes i Poy, Josep Maria Ribó Gomis, Marc Sanuy Charles, Andreu |
| author_role |
author |
| author2 |
Aguasca i Cabot, Arnau Bordas Coma, Pol Paredes i Poy, Josep Maria Ribó Gomis, Marc Sanuy Charles, Andreu |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
Astronomia de raigs gamma Cúmuls de galàxies Gamma ray astronomy Clusters of galaxies |
| topic |
Astronomia de raigs gamma Cúmuls de galàxies Gamma ray astronomy Clusters of galaxies |
| description |
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 X <sub>500</sub> within the characteristic radius R <sub>500</sub> down to about X <sub>500</sub> < 3 × 10<sup>-3</sup>, for a spatial CRp distribution that follows the thermal gas and a CRp spectral index α<sub>CRp</sub> = 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 α<sub>CRp</sub> down to about Δα<sub>CRp</sub> ≃ 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 τ <sub>χ</sub> > 10<sup>27</sup> 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. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/222160 |
| url |
https://hdl.handle.net/2445/222160 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://doi.org/10.1088/1475-7516/2024/10/004 Journal of Cosmology and Astroparticle Physics, 2024, vol. 2024, num.10 https://doi.org/10.1088/1475-7516/2024/10/004 |
| dc.rights.none.fl_str_mv |
cc-by (c) The CTA Consortium, 2024 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by (c) The CTA Consortium, 2024 http://creativecommons.org/licenses/by/3.0/es/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
105 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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15,812429 |