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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260921T044628Z
LAST-MODIFIED:20181026T202155Z
DTSTART:20181031T150000Z
DTEND:20181031T160000Z
UID:event1972@bu.edu
URL:http://physics.bu.edu/internal/events/show/1972
SUMMARY:The Galactic Center Gamma-Ray Excess
DESCRIPTION:Featuring Tim Linden\, Ohio State University\n\nPart of the HET
	 Seminar Series.\n\nOver the last seven years\, Fermi-LAT observations have
	 convincingly found an excess in gamma-ray emission emanating from the cent
	er of the Milky Way galaxy. The excess has three definitive properties: (1)
	 it has a hard spectrum that peaks at an energy of ~2 GeV\, (2) it extends 
	from within 0.1 degrees to more than 10 degrees from Sgr A* with a three-di
	mensional intensity that falls roughly as r^{-2}\, (3) it is approximately 
	spherically symmetric. Several models for this excess have been formulated\
	, including the collective emission from a population of individually dim g
	amma-ray pulsars\, outbursts of cosmic-ray electrons from the central molec
	ular zone\, or potentially even dark matter annihilation. In this overview\
	, I will discuss the observational data\, and the arguments for and against
	 each theoretical model. Additionally\, I will discuss significant improvem
	ents in gamma-ray diffuse emission modeling that enhance our understanding 
	of high energy astrophysics near the Galactic center\, and will describe th
	e impact of these models on our understanding of the gamma-ray excess\, and
	 on the prospects for dark matter annihilation.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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