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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3170
DTSTART:20131212T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T212143Z
LAST-MODIFIED:20131125T183702Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Newborn Pulsars as sources of Ultrahigh Energy Cosmic Rays\, N
 PAC (Nuclear/Particle/Astro/Cosmo) Forum\, Ke Fang\, U. Chicago
DESCRIPTION:The workings of the most energetic astrophysical accelerat
 ors in the Universe are encoded in the origin of ultrahigh energy cosm
 ic rays (UHECRs). Current observations by the Auger Observatory\, the 
 largest UHECR observatory\, show a spectrum that agrees with an extrag
 alactic origin\, as well as an interesting transition in chemical comp
 osition from light element to heavier element as energy increases. Can
 didate sources range from young neutron stars to gamma-ray bursts and 
 events in active galaxies. In this talk\, we will discuss newborn puls
 ars as the sources of ultrahigh energy cosmic rays.  We will show that
  a newborn pulsar model naturally injects heavier elements and can fit
  the observed spectrum once propagation in the supernova remnant is ta
 ken into account. With the proper injection abundances\, integrated co
 smic rays from the extragalactic pulsar population can match observati
 on in all aspects - energy spectrum\, chemical composition\, and aniso
 tropy. We will also examine the fingerprints of their Galactic counter
 parts on cosmic ray spectrum . Lastly\, we will discuss the multi-mess
 enger smoking gun of this scenario - the detectability of high energy 
 neutrinos from pulsars and magnetars. 
URL:https://www.physics.wisc.edu/events/?id=3170
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