Colloquia and PhD Talks Schedule Summer 2014
Qualifying Exam/2nd Year Defense "Outflows and Chemical Enrichment from Clustered Supernovae in the First Galaxies" University of Texas at Austin Qualifying Exam Committee Meeting follows at 4 PM in RLM 15.216A |
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Qualifying Exam/2nd Year Defense "The Lyman-alpha Signature of the First Galaxies" University of Texas at Austin Qualifying Exam Committee Meeting follows at 3 PM in RLM 15.216A |
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Qualifying Exam/2nd Year Defense "Formation of Massive Star Clusters - an Application of Monte Carlo Radiation Hydrodynamics" University of Texas at Austin Qualifying Exam Committee Meeting follows at 3 PM in RLM 15.202A |
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Special Seminar "Fragmentation in Primordial Gas: Improving H2 Cooling and Self-Shielding" University of Heidelberg, Germany (host: Volker Bromm) |
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Special Visiting Speaker Presentation (visiting: 7-14 June 2014) "Pre-supernova Convection in Massive Stars" The interior of a massive star in the final years prior to core-collapse supernova is in a state of violent unrest.
Vigorous convective shell burning of silicon, oxygen and carbon drives large scale plume motions that can
interact with each other and significantly alter the structure of the progenitor star. Under such conditions
the star departs from perfect hydrostatic equilibrium and spherical symmetry and may experience dynamical pulses
that, in some cases, can lead to episodic mass-loss. I will present preliminary results from
multidimensional simulations of convection in massive stars in the few seconds to hours preceding the supernova
explosion. The proper, dynamical multidimensional treatment of convection will be bench-marked against
parametrized one-dimensional mixing length theory predictions and the implications for realistic
core-collapse supernova progenitor models will be discussed. I will also present a new method
to characterize pre-supernova convection, the method of Vector Spherical Harmonics decomposition, and
discuss how it can be used to make realizations of core-collapse models in future simulations. University of Chicago host: Crag Wheeler |
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PhD Defense Presentation "Creating and Measuring White Dwarf Photospheres in a Terrestrial Laboratory" University of Texas at Austin PhD Committee Meeting follows at 12 Noon in RLM 15.216A |
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PhD Defense Presentation "Study of Galactic Clumps with Millimeter/Submillimeter Continuum and Molecular Emission: Early Stages of Massive Star Formation" University of Texas at Austin PhD Committee Meeting follows at 4 PM in RLM 15.216A |
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PhD Defense Presentation "Simulating the Formation, Properties, and Impact of Stellar Systems in the First Galaxies" University of Texas at Austin PhD Committee Meeting follows at 12 Noon in RLM 15.216A |
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Special Presentation "The Violent Early Lives of Stars and Planets" University of Texas at Austin |
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PhD Defense Presentation "The Chemical Abundances of Stars in the Halo" University of Texas at Austin PhD Committee Meeting follows at 12 Noon in RLM 15.202A |
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PhD Defense Presentation "Radiation Hydrodynamics and Simulations of Astrophysical Phenomena" University of Texas at Austin PhD Committee Meeting follows at 4 PM in RLM 15.202A |
Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.
Please report omissions/corrections to: G. Orris at argus@astro.as.utexas.edu.
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