PI: Peter Garnavich, University of Notre Dame, firstname.lastname@example.org
Address: Physics Department, 225 Nieuwland Hall, Notre Dame, IN 46556, US
CoI: Howie Marion, University of Texas, Austin
CoI: Peter Hoeflich, University of Texas, Austin
Title: Type Ia Supernovae: The Collision of Theory and Observation
Abstract: Type Ia supernovae can be reliable probes of cosmology if their explosion mechanism is better understood. Optical spectra of these events have provided important clues, but near-infrared wavelengths open a unique window with a number of key diagnostic features which provide direct estimates of progenitor metallicity and the density of transition from deflagration to detonation. Models are now sophisticated and predict subtle features that require good signal-to-noise spectra achievable in the IR only with a large telescope like Gemini . We propose obtaining JHK NIR spectra of a single SN Ia with NIRI and Gemini North on three epochs around maximum light. We have shown that there are enough local SN Ia events discovered over a month that this program can be queue scheduled and avoid the problems involved in `targets of opportunity'.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360