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X-WR-CALNAME;VALUE=TEXT:ITC Colloquium  Eric Coughlin (Berkeley)
PRODID:-//Harvard events data//EN
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SUMMARY:ITC Colloquium  Eric Coughlin (Berkeley)
DESCRIPTION:"Failed Supernovae Unfailed"<p>	<strong>Abstract: </strong>During the core collapse of a massive star, the formation of the protoneutron star is accompanied by the emission of a significant amount of mass-energy (a few tenths of a Solar mass) in the form of neutrinos. This mass loss generates an outward-propagating pressure wave that steepens into a shock near the stellar surface, potentially powering a weak transient if the core collapse itself does not produce a successful supernovae. I will discuss a general formalism for analyzing this mass-loss-induced shock formation in otherwise-failed supernovae. I will then apply this formalism to polytropic stellar models, and make predictions for the energy contained in the shock as it erupts from the stellar surface. I will show that these predictions are in good agreement with numerical simulations -- both of polytropes and of more general stellar models -- and heuristic estimates. Our findings have important implications for the appearance and detectability of failed supernovae.</p>
LOCATION:Pratt
STATUS:CONFIRMED
DTSTART:20171102T150000Z
DTEND:20171102T160000Z
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