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

Judit Pérez Romero (Author), Saptashwa Bhattacharyya (Author), B. Marčun (Author), Samo Stanič (Author), Veronika Vodeb (Author), Serguei Vorobiov (Author), Gabrijela Zaharijas (Author), Marko Zavrtanik (Author), Danilo Zavrtanik (Author), Miha Živec (Author)

Abstract

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. OurDMmodelling 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.

Keywords

dark matter;gamma-ray astronomy;galaxy clusters;astroparticles;cosmic rays;

Data

Language:	English
Year of publishing:	2022
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	UNG - University of Nova Gorica
UDC:	539.1
COBISS:	139672835
ISSN:	1824-8039
Views:	560
Downloads:	12
Average score:	0 (0 votes)
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Other data

URN:	URN:SI:UNG
Type (COBISS):	Not categorized
Pages:	str. 1-22
Issue:	[Article no.] 546
Chronology:	2022
ID:	17852533