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White Dwarf Supernovae: Physics and Cosmology
  OKC colloquia

Tuesday 30 May 2017
from 13:15 to 14:15
at FB42
Speaker : Saurabh Jha (Rutgers University)
Abstract : Observations of type Ia supernovae (SN Ia), a class of exploding stars, ushered in a cosmological revolution: the expansion of the Universe is accelerating, driven by dark energy. I will describe how we are using these exploding white dwarf stars to study the expansion history of the Universe, and the prospects for precision cosmology with future supernova surveys through flagship projects like the Large Synoptic Survey Telescope (LSST) on the ground and the Wide-Field Infrared Survey Telescope (WFIRST) in space. Surprisingly, one of the major uncertainties in this field is linked to our lack of detailed understanding of the physics of these supernovae. Unusual objects, including a class we call "type-Iax" supernovae, provide a window into the progenitors, binary companions, and explosion mechanisms of white dwarf supernovae, and may yield imporant clues to the nature of SN Ia and the variety of systems that result in white dwarf explosions. [Host: Rahman Amanullah]

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