Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

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

Abstract

High-energy gamma rays are promising tools to constrain or reveal the nature of dark matter, in particular Weakly Interacting Massive Particles. Being well into its pre-construction phase, the Cherenkov Telescope Array (CTA) will soon probe the sky in the 20 GeV - 300 TeV energy range. Thanks to its improved energy and angular resolutions as well as significantly larger e˙ective area when compared to the current generation of Cherenkov telescopes, CTA is expected to probe heavier dark matter, with unprecedented sensitivity, reaching the thermal annihilation cross-section at 1 TeV. This talk will summarise the planned dark matter search strategies with CTA, focusing on the signal from the Galactic centre. As observed with the Fermi LAT at lower energies, this region is rather complex and CTA will be the first ground-based observatory sensitive to the large scale di˙use astrophysical emission from that region. We report on the collaboration e˙ort to study the impact of such extended astrophysical backgrounds on the dark matter search, based on Fermi-LAT data in order to guide our observational strategies, taking into account various sources of systematic uncertainty.

Keywords

very-high energy gamma-rays;Cherenkov Telescope Array;

Data

Language:	English
Year of publishing:	2022
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	UNG - University of Nova Gorica
UDC:	539.1
COBISS:	164768515
ISSN:	1824-8039
Views:	79
Downloads:	2
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