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BEGIN:VEVENT
DTSTAMP:20260628T201250Z
DTSTART;VALUE=DATE-TIME:20121009T150000
DTEND;VALUE=DATE-TIME:20121009T170000
SUMMARY:Pier-Emmanuel Tremblay (Heidelberg)
TZID:Europe/London
UID:20121009-094d43a23a02ed77013a14880d203c37@warwick.ac.uk
CREATED:20120930T001631Z
DESCRIPTION:Astronomy Seminar Pier-Emmanuel Tremblay (Zentrum für Astrono
 mie der Universität Heidelberg\, Germany) Title: 3D model atmospheres of
  white dwarfs Abstract: White dwarfs with hydrogen-rich atmospheres are 
 the most abundant of all degenerate objects. Their atmospheres are thoug
 ht to be relatively simple\, with a pure composition due to the gravitat
 ional settling\, and we rely on them as spectroscopic standards. Neverth
 eless\, a great deal of work has been done in recent years to increase t
 he accuracy of their model spectra. Most notably\, we improved the macro
 physics aspect of the models by using for the first time 3D radiation-hy
 drodynamics instead of the standard 1D models for the treatment of conve
 ctive motions. It will be shown that these 3D simulations now reach the 
 level of accuracy to be the main theoretical tool in spectroscopic analy
 zes of cool white dwarfs. Furthermore\, we demonstrate that our improved
  model spectra provide a much better characterization of the mass distri
 bution of white dwarfs.
LOCATION:P.523
CATEGORIES:Astronomy Seminar
LAST-MODIFIED:20120930T001631Z
ORGANIZER;CN="":
END:VEVENT
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