9-14 October 2017
Guadalajara, Mexico
Mexico/General timezone

Fermi LAT studies of cosmic-ray anisotropy at the 100 GeV scale

11 Oct 2017, 17:40
30m
Guadalajara, Mexico

Guadalajara, Mexico

Hotel Krystal Urban Guadalajara Av. López Cotilla No. 2077 Col. Arcos Vallarta Guadalajara, Jalisco, 44130
Invited Talk Session VI

Speaker

Prof. Justin Vandenbroucke (University of Wisconsin)

Description

The Fermi Large Area Telescope (LAT) is optimized for gamma-ray measurements, but most of the events it records are protons. Compared to ground-based air shower arrays, the LAT provides complementary capabilities regarding cosmic-ray anisotropy. It is sensitive in the ~100 GeV energy range and above, views the entire sky using a single instrument with no holes in exposure, and can efficiently discriminate protons from heavier nuclei as well as from leptons and gamma rays. Moreover, while ground-based instruments are only sensitive to the right ascension component of cosmic-ray anisotropy, the LAT is sensitive to all orientations of anisotropy. I will present a search for cosmic-ray proton anisotropy with eight years of LAT data, the largest all-sky cosmic-ray proton data set ever collected in this energy range (80 GeV to 10 TeV). I will also review recent LAT results on cosmic-ray electron and positron anisotropy.

Primary authors

Prof. Justin Vandenbroucke (University of Wisconsin) Mr Matthew Meehan (University of Wisconsin)

Presentation Materials