Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
Langue
en
Article de revue
Ce document a été publié dans
Mon.Not.Roy.Astron.Soc.. 2023, vol. 523, n° 4, p. 5353-5387
Résumé en anglais
A deep survey of the Large Magellanic Cloud at ~0.1-100TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the emission of the galaxy, comprising the ...Lire la suite >
A deep survey of the Large Magellanic Cloud at ~0.1-100TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the emission of the galaxy, comprising the four known TeV emitters, mock populations of sources, and interstellar emission on galactic scales. We also assess the detectability of 30 Doradus and SN 1987A, and the constraints that can be derived on the nature of dark matter. The survey will allow for fine spectral studies of N157B, N132D, LMC P3, and 30 Doradus C, and half a dozen other sources should be revealed, mainly pulsar-powered objects. The remnant from SN 1987A could be detected if it produces cosmic-ray nuclei with a flat power-law spectrum at high energies, or with a steeper index 2.3-2.4 pending a flux increase by a factor >3-4 over ~2015-2035. Large-scale interstellar emission remains mostly out of reach of the survey if its >10GeV spectrum has a soft photon index ~2.7, but degree-scale 0.1-10TeV pion-decay emission could be detected if the cosmic-ray spectrum hardens above >100GeV. The 30 Doradus star-forming region is detectable if acceleration efficiency is on the order of 1-10% of the mechanical luminosity and diffusion is suppressed by two orders of magnitude within <100pc. Finally, the survey could probe the canonical velocity-averaged cross section for self-annihilation of weakly interacting massive particles for cuspy Navarro-Frenk-White profiles.< Réduire
Mots clés en anglais
photon, energy
acceleration, efficiency
energy, high
photon, emission
nucleus, cosmic radiation
cosmic radiation, spectrum
Cherenkov Telescope Array
cloud
galaxy
TeV
spectral
diffusion
dark matter
sensitivity
WIMP
flux
suppression
Navarro-Frenk-White profile
Origine
Importé de halUnités de recherche