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SUMMARY:Extragalactic science with the CTAO
DTSTART:20260430T093000Z
DTEND:20260430T103000Z
DTSTAMP:20260511T070100Z
UID:indico-event-1807@indico.dfa.unipd.it
CONTACT:elisa.prandini@unipd.it
DESCRIPTION:Speakers: Jonathan Biteau (Université Paris-Saclay\, IJCLab -
 Institut universitaire de France)\n\n\nBeyond the Milky Way\, the universe
  has begun to reveal its mysteries in gamma rays thanks to current-generat
 ion imaging Cherenkov telescopes. The new generation of gamma-ray observat
 ories\, in particular the Cherenkov Telescope Array Observatory (CTAO)\, p
 romises to transform our understanding of the extragalactic ecosystem at t
 he frontier of the universe's electromagnetic spectrum. This observatory i
 s poised to provide information on non-thermal astrophysical processes occ
 urring up to cosmic noon (z ~ 2) and beyond. These processes include the a
 cceleration of hadrons and leptons in galaxies within the Local Volume (< 
 10 Mpc) and in nearby galaxy clusters (< 100 Mpc). They also include the e
 volution of jetted supermassive and stellar-sized black holes throughout t
 he cosmic history of accretion and star formation. Extragalactic gamma-ray
  observations probe dark-matter candidates\, including primordial black ho
 les\, weakly interacting particles\, and wave candidates like axions. Futu
 re gamma-ray observations will also enable key cosmological measurements. 
 These include the universe's thermal output\, large-scale magnetic fields\
 , and its expansion rate. Currently\, extragalactic gamma-ray astronomy pr
 ovides constraints on the Hubble constant with a precision comparable to t
 hat obtained with gravitational waves. In the coming years\, gamma-ray obs
 ervations may be able to contribute to resolving the current tensions rega
 rding this key cosmological parameter. Some phenomena probed by extragalac
 tic gamma-ray astronomy even touch on the foundations of the Standard Mode
 l\, promising constraints on Lorentz symmetry and cosmological phase trans
 itions. This presentation provides an overview of current research in extr
 agalactic gamma-ray astronomy and explores the expected precision measurem
 ents and groundbreaking discoveries in the coming years.\nJoin Zoom Meetin
 g  \n \nhttps://unipd.zoom.us/j/82482883288?pwd=MVvmMWSGaiVrGMyAFOdyQG61
 OAcI7D.1\nMeeting ID: 824 8288 3288 Passcode: 072472\n\n\nhttps://indico.
 dfa.unipd.it/event/1807/
LOCATION:Sala Jappelli (Osservatorio astronomico di Padova)
URL:https://indico.dfa.unipd.it/event/1807/
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