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UID:UW-Physics-Event-3615
DTSTART:20150127T200000Z
DTEND:20150127T210000Z
DTSTAMP:20260308T233807Z
LAST-MODIFIED:20150123T224152Z
LOCATION:4274 Chamberlin Hall
SUMMARY:Chasing our Cosmic Dawn: Opening the 21cm cosmological window 
 on the universe\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Daniel C
 . Jacobs\, NSF Fellow\, Arizona State University
DESCRIPTION:The Epoch of Reionization (EoR) marks when the first stars
  ionized primordial hydrogen half a billion years after the big bang. 
  Direct observation of cosmological hydrogen is possible via the 21cm 
 line and is now being hotly pursued as a new cosmological probe. I am 
 a major contributor to new large-scale radio arrays including the Prec
 ision Array for Probing the Epoch of Reionization (PAPER)\, the Murchi
 son Widefield Array (MWA) and the upcoming Hydrogen Epoch of Reionizat
 ion Array (HERA).  PAPER currently holds the deepest limits on the epo
 ch of reionization power spectrum\, while the MWA is making major adva
 ncements in understanding foregrounds at a level necessary for imaging
  large scale structure. My group specializes in commissioning\, operat
 ing and delivering results with these new types of arrays. Current pro
 jects include digital modeling of instrumental response\, developing h
 igh level heuristics for data flagging\, accelerating imaging pipeline
 s\, pushing more analysis steps into real-time systems\, and in-situ c
 alibration with external drone-mounted transmitters.   Lessons learned
  and systems developed for PAPER and the MWA are being incorporated in
 to the design and operations model of the next generation HERA\, which
  will yield 20 times the sensitivity of first generation arrays and on
  into the regime of the upcoming Square Kilometer Array.
URL:https://www.physics.wisc.edu/events/?id=3615
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