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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4828
DTSTART:20180420T194500Z
DURATION:PT1H0M0S
DTSTAMP:20260414T225346Z
LAST-MODIFIED:20180416T191705Z
LOCATION:2241 Chamberlin Hall
SUMMARY:A Fresh Look at Abundances of Iron-group Elements in Very Meta
 l-Poor Stars\, JIMFEST 2018\, Chris Sneden\, University of Texas\, Aus
 tin
DESCRIPTION:Studies of very metal-poor stars have focused attention on
  the neutron-capture (Z > 30) elements\, whose dramatic star-to-star v
 ariations give us insights to element production in extreme\, explosiv
 e nucleosynthesis environments.  Neglected in this fascinating exotic 
 element concentration is that the Fe group (Z = 21-30) often have inad
 equate abundances to say much of anything useful to massive star evolu
 tion theorists.  Major improvements are ongoing in treatment of radiat
 ive transfer and stellar atmosphere structure.  But these modeling imp
 rovements will completely wasted if the basic atomic data cannot be tr
 usted.  Jim Lawler's Wisconsin atomic physics group is nearly completi
 on of lab work on neutrals and first ions of nearly all of the Fe-grou
 p elements.  This talk will describe them and show how they are being 
 used to overturn prevailing notions of early synthesis of the most abu
 ndant heavy elements in our Galaxy. 
URL:https://www.physics.wisc.edu/events/?id=4828
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