[Triumf-seminars] TRIUMF Colloquium today at 14:00
TRIUMF Seminars
triumf-seminars at lists.triumf.ca
Thu May 1 05:00:04 PDT 2014
Date/Time: Thu 2014-05-01 at 14:00
Location: Auditorium
Speaker: David Hanna (McGill University)
Title: Gamma-ray Astronomy at the Highest Energies
Abstract: Gamma-ray astronomy at energies above 100 GeV is a young science where particle physics mixes with astrophysics. In addition to studying high-energy objects such as supernova remnants and active galactic nuclei, researchers look for evidence of dark-matter particle annihilation and violation of Lorentz invariance.
Detection of gamma rays from distant sources makes use of Cherenkov light generated by relativistic electrons and positrons in air showers caused by the impact of these gamma rays on the upper atmosphere. Apparatus and techniques very similar to those found in experiments at particle colliders.
In this talk I will go over the evolution of the field and present some recent results, emphasizing contributions from the VERITAS detector, an array of four 12-metre-diameter telescopes in southern Arizona that has been running since 2007.
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