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Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation

Abdalla H.
•
Abe H.
•
Acero F.
altro
Zivec M.
2021
  • journal article

Periodico
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Abstract
The Cherenkov Telescope Array (CTA), the new-generation ground-based observatory for γ astronomy, provides unique capabilities to address significant open questions in astrophysics, cosmology, and fundamental physics. We study some of the salient areas of γ cosmology that can be explored as part of the Key Science Projects of CTA, through simulated observations of active galactic nuclei (AGN) and of their relativistic jets. Observations of AGN with CTA will enable a measurement of γ absorption on the extragalactic background light with a statistical uncertainty below 15% up to a redshift z=2 and to constrain or detect γ halos up to intergalactic-magnetic-field strengths of at least 0.3 pG . Extragalactic observations with CTA also show promising potential to probe physics beyond the Standard Model. The best limits on Lorentz invariance violation from γ astronomy will be improved by a factor of at least two to three. CTA will also probe the parameter space in which axion-like particles could constitute a significant fraction, if not all, of dark matter. We conclude on the synergies between CTA and other upcoming facilities that will foster the growth of γ cosmology.
DOI
10.1088/1475-7516/2021/02/048
WOS
WOS:000625299600006
Archivio
http://hdl.handle.net/11390/1206498
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85103064424
Diritti
metadata only access
Soggetti
  • active galactic nucle...

  • gamma ray experiment

  • axion

  • extragalactic magneti...

Scopus© citazioni
17
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
42
Data di acquisizione
Mar 27, 2024
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