Cosmic Chandlery with Thermonuclear Supernovae

Speaker Name: 
Professor Alan Calder
Start Time: 
Monday, November 7, 2016 - 4:00pm
End Time: 
Monday, November 7, 2016 - 5:00pm
Engineering 2, Room 180 (simularium)

Thermonuclear (Type Ia) supernovae are bright stellar explosions distinguished by light curves that can be calibrated to allow for their use as "standard candles" for measuring cosmological distances. Contemporary research investigates how properties of the progenitor system that follow from properties of the host galaxy such as composition and age influence the brightness of an event. The goals are to better understand systematic effects and to assess the intrinsic scatter in the brightness, thereby reducing uncertainties in cosmological studies. I will describe our flame capturing and energetics scheme for modeling these events and present results from simulations addressing the influence of age and composition on the brightness of an event. I will also present simulations from "hybrid" progenitor models that incorporate recent advances in stellar evolution.