Prospects for annihilating dark matter from M31 and M33 observations with the Cherenkov Telescope Array

Michailidis, Miltiadis; Marafatto, Lorenzo; Malyshev, Denys; Iocco, Fabio; Zaharijas, Gabrijela; Sergijenko, Olga; Bernardos, Maria Isabel; Eckner, Christopher; Boyarsky, Alexey; Sokolenko, Anastasia; Santangelo, Andrea

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Title:	Prospects for annihilating dark matter from M31 and M33 observations with the Cherenkov Telescope Array
Authors:	ID Michailidis, Miltiadis (Author) ID Marafatto, Lorenzo (Author) ID Malyshev, Denys (Author) ID Iocco, Fabio (Author) ID Zaharijas, Gabrijela (Author) ID Sergijenko, Olga (Author) ID Bernardos, Maria Isabel (Author) ID Eckner, Christopher (Author) ID Boyarsky, Alexey (Author) ID Sokolenko, Anastasia (Author) ID Santangelo, Andrea (Author)
Files:	https://iopscience.iop.org/article/10.1088/1475-7516/2023/08/073/pdf https://iopscience.iop.org/article/10.1088/1475-7516/2023/08/073 https://iopscience.iop.org/article/10.1088/1475-7516/2023/08/073/pdf This document has even more files. Complete list of files is available below.
Language:	English
Work type:	Unknown
Typology:	1.01 - Original Scientific Article
Organization:	UNG - University of Nova Gorica
Abstract:	Abstract M31 and M33 are the closest spiral galaxies and the largest members (together with the Milky Way) of the Local group, which makes them interesting targets for indirect dark matter searches. In this paper we present studies of the expected sensitivity of the Cherenkov Telescope Array (CTA) to an annihilation signal from weakly interacting massive particles from M31 and M33. We show that a 100 h long observation campaign will allow CTA to probe annihilation cross-sections up to 〈συ〉 ≈ 5·10-25 cm3 s-1 for the τ + τ - annihilation channel (for M31, at a DM mass of 0.3 TeV), improving the current limits derived by HAWC by up to an order of magnitude. We present an estimate of the expected CTA sensitivity, by also taking into account the contributions of the astrophysical background and other possible sources of systematic uncertainty. We also show that CTA might be able to detect the extended emission from the bulge of M31, detected at lower energies by the Fermi/LAT.
Keywords:	dark matter, gamma rays, Cherenkov Telescope Array, i
Publication date:	01.08.2023
Year of publishing:	2023
Number of pages:	str. 1-35
Numbering:	Vol. 2023, no. 8, [article no.] 073
PID:	20.500.12556/RUNG-9774
COBISS.SI-ID:	222008323
UDC:	52
ISSN on article:	1475-7516
DOI:	10.1088/1475-7516/2023/08/073
NUK URN:	URN:SI:UNG:REP:QHLCPTUE
Publication date in RUNG:	13.01.2025
Views:	558
Downloads:	10
Metadata:
:	MICHAILIDIS, Miltiadis, MARAFATTO, Lorenzo, MALYSHEV, Denys, IOCCO, Fabio, ZAHARIJAS, Gabrijela, SERGIJENKO, Olga, BERNARDOS, Maria Isabel, ECKNER, Christopher, BOYARSKY, Alexey, SOKOLENKO, Anastasia and SANTANGELO, Andrea, 2023, Prospects for annihilating dark matter from M31 and M33 observations with the Cherenkov Telescope Array. Journal of cosmology and astroparticle physics [online]. 2023. Vol. 2023, no. 8, 073, p. 1–35. [Accessed 21 April 2025]. DOI 10.1088/1475-7516/2023/08/073. Retrieved from: https://iopscience.iop.org/article/10.1088/1475-7516/2023/08/073/pdf Copy citation