#  ITC Colloquium Eric Coughlin (Berkeley) 

 



####  calendar\_today Date and Time 

 **November 2, 2017** 

 11:00AM - 12:00PM EDT 

####  pin\_drop Location 

 **Pratt**  



 

 



 

"Failed Supernovae Unfailed" **Abstract:** 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.



 

 



 

 See also:- [ 2017-18 ](/academic-year/2017-18)
- [ Colloquium ](/event-type/colloquium)
 
 

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