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Eruptions, disruptions and (repeated) explosions: massive stars at the end of their life

Event Details

Event Dates: 

Monday, December 9, 2013 - 4:00pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

Raffaella Margutti

Speaker Affiliation(s): 

Harvard Smithsonian Center for Astrophysics
Seminar Type/Subject

Scientific Seminar Type: 

  • Astrophysical & Planetary Sciences Seminar

Event Details & Abstract: 

Observations are drawing a complex picture of the latest stages of massive stars evolution and their explosions. In this seminar I concentrate on two among the least understood aspects, adopting an observational perspective: (i) How do massive stars loose a significant fraction of their mass in the years preceding the explosion? (ii) What is the role of central-engines in explosions originating from progenitors that managed to loose their entire hydrogen envelope? I address these questions taking advantage from panchromatic observations of two remarkable explosions: the puzzling, double explosion of SN2009ip in 2012, and the mildly relativistic, engine-driven SN2010bh, that bridges the gap between ordinary explosions and fully relativistic gamma-ray bursts.