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Title:Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Authors:ID Saturni, F. G. (Author)
ID Bhattacharyya, Saptashwa (Author)
ID Pérez Romero, Judit (Author)
ID Stanič, Samo (Author)
ID Vodeb, Veronika (Author)
ID Vorobiov, Serguei (Author)
ID Zavrtanik, Danilo (Author)
ID Zavrtanik, Marko (Author)
ID Živec, Miha (Author), et al.
Files:.pdf ICRC2023_1366.pdf (4,11 MB)
MD5: D8CE2D6E80623E89E77A1A29F4367436
 
URL https://pos.sissa.it/444
 
URL https://pos.sissa.it/444/1366/pdf
 
Language:English
Work type:Unknown
Typology:1.08 - Published Scientific Conference Contribution
Organization:UNG - University of Nova Gorica
Abstract:Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles can annihilate or decay, producing final-state Standard Model pairs that subsequently annihilate into high-energy �-rays. The dwarf spheroidal galaxies (dSphs) in the Milky Way DM halo have long been considered optimal targets to search for annihilating DM signatures in GeV-to-TeV �-ray spectra due to their high DM densities (hence high astrophysical factors), as well as the expected absence of intrinsic �-ray emission of astrophysical origin. For such targets, it is important to compute the amount of DM in their halos in a consistent way to optimize the �-ray data analysis. Such estimates directly affect the observability of DM signals in dSphs, as well as the DM constraints that can be derived in case of null detection. In this contribution, we present the results on the sensitivity of the Cherenkov Telescope Array (CTA) for DM annihilation and decay searches using planned observations of the Milky Way dSphs. We select the most promising targets among all presently known dwarf satellites, providing new determinations of their expected DM signal. This study shows an improvement of approximately an order of magnitude in sensitivity compared to current searches in similar targets. We also discuss the results in terms of cuspy and cored DM models, and investigate the sensitivity obtained by the combination of observations from different dSphs. Finally, we explore the optimal strategies for CTA observations of dSphs.
Keywords:Cherenkov Telescope Array, CTA, dark matter, standard model, dwarf spheroidal galaxies
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2023
Year of publishing:2023
Number of pages:str. 1-16
PID:20.500.12556/RUNG-8459-485fd3b3-d03e-54c3-fc9a-f3bec824526b New window
COBISS.SI-ID:165837571 New window
UDC:539.1
ISSN on article:1824-8039
NUK URN:URN:SI:UNG:REP:CIRPMCRP
Publication date in RUNG:26.09.2023
Views:2643
Downloads:15
Metadata:XML DC-XML DC-RDF
:
SATURNI, F. G., BHATTACHARYYA, Saptashwa, PÉREZ ROMERO, Judit, STANIČ, Samo, VODEB, Veronika, VOROBIOV, Serguei, ZAVRTANIK, Danilo, ZAVRTANIK, Marko and ŽIVEC, Miha, 2023, Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array. In : 38th International Cosmic Ray Conference [also] ICRC2023 [online]. Published Scientific Conference Contribution. 2023. p. 1–16. [Accessed 7 April 2025]. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=8459
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Record is a part of a proceedings

Title:38th International Cosmic Ray Conference [also] ICRC2023
COBISS.SI-ID:162195971 New window

Record is a part of a journal

Title:Proceedings of science
Shortened title:Pos proc. sci.
Publisher:Sissa
ISSN:1824-8039
COBISS.SI-ID:20239655 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0031
Name:Večglasniška astrofizika

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

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