Abstract

Transient and Time Domain Astronomy: Robotic telescopes, surveys and the evolution of transient phenomena
Super-Chadrasekhar Type Ia Supernovae
Michael Childress
University of Southampton
Type Ia supernovae (SNe Ia) are widely believed to arise from the thermonuclear disruption of a carbon-oxygen white dwarf (WD) which has reached some instability condition due to interaction with a binary companion. Historically astronomers believed this was most like to result from steady accretion of material from a non-degenerate companion onto the WD until it reached the critical Chandrasekhar mass. A decade ago, a new rare subclass of SNe Ia with exceptionally high luminosities challenged this scenario: a handful of SNe Ia were deemed to be candidates for arising from "super-Chadrasekhar" progenitor systems exceeding (sometimes significantly) the Chandrasekhar mass. In this talk I will give an update on recent developments for this sub-class of SNe Ia, including new data from recent very nearby super-Chandra SNe Ia. I will also discuss the potential yield of super-Chandra SNe Ia in the LSST era and what this could tell us about the diversity of possible SN Ia progenitor systems.

Schedule

Friday
09:00 - 10:30
09:18
EX - LT3 (320)

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