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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-4159
DTSTART:20160505T203000Z
DTEND:20160505T220500Z
DTSTAMP:20260419T075755Z
LAST-MODIFIED:20160404T195107Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30\, Talk begins 3:
 45 
SUMMARY:Precision Stellar Astrophysics: Asteroseismology and Large Spe
 ctroscopic Surveys\, Astronomy Colloquium\, Dr. Marc Pinsonneault\, Oh
 io State University
DESCRIPTION:Large time domain and spectroscopic surveys are revolution
 izing stellar astrophysics.  In this talk I will focus on the APOKASC 
 project\, involving a combination of asteroseismic and rotational data
  from the Kepler satellite and high-resolution H-band spectroscopy fro
 m APOGEE.  Asteroseismology gives precise surface gravities and evolut
 ionary state measurements\, and the frequency pattern combined with sp
 ectroscopic data can also be used to independently measure mass\, radi
 us\, and age.  I critically assess the performance of asteroseismology
  against independent measurements\, and  also discuss the prospects fo
 r detailed tests of stellar physics (helium\, convection zone depth\, 
 core mass and rotation.)  Insights into stellar populations\, such as 
 spectroscopic mass estimates and an unexpectedly large fraction of you
 ng alpha-rich stars\, will also be covered.  Future and ongoing missio
 ns will be reviewed\, and synergies with Gaia will be discussed. 
URL:https://www.physics.wisc.edu/events/?id=4159
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