CfA Colloquium Schedule Fall 2012
 27 September 2012

27 September 2012

Speaker: Robert Kirshner (CfA)

Title:Exploding Stars: from the LMC to the Accelerating Universe

Abstract:Supernova explosions mark the violent end of stars. A long series of Hubble Space Telescope observations of SN 1987A, discovered 25 years ago in the Large Magellanic Cloud, provides a detailed look at the mechanism for core collapse and the origin of supernova remnants. Type Ia supernovae provide reliable standard candles for measuring the history of cosmic expansion and demonstrated that we live in an accelerating universe. I will give a brief sketch of ongoing work in both these fields, and describe the RAISIN program to use 100 orbits of Cycle 20 HST time to improve the constraints on dark energy by exploiting the infrared properties of SN Ia.

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