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SUMMARY:Probing the cosmic dawn and the epoch of reionization with the 21c
 m Hydrogen line
DTSTART:20161121T161500
DTEND:20161121T171500
DTSTAMP:20260919T032412Z
UID:10d466efc94d5b16612523db36e878ca8c15bc72526e04954a303e0d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Jacqueline Hewitt\, Professor of Physics\, Director Kavl
 i Institute for Astrophysics & Space Research\nBio: Prof. Hewitt is an Ame
 rican astrophysicist.\n\nHewitt was appointed with a postdoctoral fellowsh
 ip at MIT as part of the Very-long-baseline interferometry unit from 1986-
 1988. While analyzing the data from her graduate studies\, she found a rin
 g on her computer screen. This ring\, located in the Leo\, ended up being 
 the very first Einstein ring discovered. Since Hewitt's groundbreaking dis
 covery\, many other Einstein rings have been discovered\, and were found t
 o be far more common than astronomers thought. Einstein rings are importan
 t because they can help answer questions about the size and the fate of ou
 r universe. Hewitt worked as a researcher at Princeton University's Depart
 ment of Astrophysical Sciences in 1988. After one year of researching at P
 rinceton\, she returned to MIT as an assistant physics professor\, working
  as a full-time professor since 1989.\n\nHewitt is also the principal inve
 stigator for the Radio Astronomy Group of the Research Laboratory of Elect
 ronics at MIT. Since 2002\, Hewitt has been appointed Director of the MIT 
 Kavli Institute for Astrophysics and Space Research.\nMeasurements of the 
 cosmic microwave background at redshift 1100 give us information about th
 e initial density fluctuations that seeded structure formation. Observati
 ons of galaxies at redshift 7 give us information about the outcome of th
 is structure formation.    Between those redshifts lies a new frontier 
 of cosmology -- the cosmic dawn -- the formation of the first stars and
  the reionization of the intergalactic medium.   Several recently comple
 ted low frequency radio arrays provide us with an early glimpse into the 
 Epoch of Rionization through the redshifted neutral hydrogen 21cm radio l
 ine.  \n\nA new instrument\, the Hydrogen Epoch of Reionization Array (H
 ERA) is beginning construction.  HERA will be significantly more capable
 \, and presents interesting opportunities and challenges.
LOCATION:Auditoire CE3
STATUS:CONFIRMED
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