SPACE AND COSMIC RAY PHYSICS SEMINAR

University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, March 27, 2017
Coffee, Tea & Snacks 4:15-4:30 PM

Ke Fang
University of Maryland
Perspectives of finding the sources of high-energy astrophysical neutrinos

The origin of astrophysical neutrinos remains a mystery. Growing statistics from the IceCube Observatory at TeV-PeV energies starts to reveal important features of the sources, yet the isotropic spacial distribution of the observed events implies that to detect point sources, both order-of-magnitude more statistics and more advanced search tools are needed. In light of these observational constraints and implications, we investigate the perspectives of finding the sources of high-energy neutrinos from both theoretical and experimental aspects. We first discuss the potential source classes of the IceCube neutrinos, with an emphasis on black hole jets in clusters of galaxies. Then from the analysis point of view we introduce a maximum-likelihood method for search of point-like sources utilizing event pairs. We show that when a decent angular resolution is available, this method is capable of reducing the statistical errors significantly comparing to the traditional search method using individual events. Finally by applying the new method we predict the ability of a future high-energy neutrino detector to identify the first neutrino point sources.


Sponsored by: Department of Physics and the Institute for Physical Science and Technology, University of Maryland. For information call Catha Stewart at (301) 405-4811 or go to the UMD Space Physics group seminar web site.

There is free parking after 4:00 PM in lot B (the big parking garage across the street from the ATL building). There are a limited number of spaces in lot Q next to the new ATL wing with free parking after 4PM even when there is a basketball game on campus.