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DTSTART;TZID=America/Los_Angeles:20170421T120000
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DTSTAMP:20260528T023623
CREATED:20170303T221606Z
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UID:180-1492776000-1492779600@inpa.lbl.gov
SUMMARY:Ken Chen (NAOJ) - Lighting up the Universe with Extreme Supernovae
DESCRIPTION:Recent all-sky transient searches have discovered new and unexpected explosion types that fall outside traditional SN classification schemes. These exotic outliers in many cases are due to the deaths of massive stars and therefore may have been prevalent in the primordial universe because the Pop III IMF is thought to be top-heavy. Depending on the mass of the progenitor\, these outliers may be faint\, magnetar-powered\, pair-instability\, or general relativistic instability SNe\, all of which have unique observational signatures. Some of these events are superluminous\, 10-100 times brighter than normal supernovae\, and may produce energetic UV\, X-ray\, or gamma-ray bursts. Their extreme luminosities enable their detection at z > 10 and they are ideal probes of the primordial universe at cosmic dawn\, prior to the advent of the first galaxies. Here\, we examine these exotic explosions with state of the art 3D radiation-hydro simulations that bridge all spatial scales from the central engine to breakout into the IGM\, where observational signatures can be computed. We discuss the coevolution of radiation and turbulent mixing in SN ejecta and present realistic light curves for these explosions for JWST and the coming generation of extremely large telescopes (ELTs). Detection rates for Pop III SNe can place useful constraints on the primordial IMF\, and their nucleosynthetic yields can be used to study the chemical compositions of extreme metal poor stars.
URL:https://inpa.lbl.gov/event/ken-chen-naoj/
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