PI: Ginger Bryngelson, Clemson University, email@example.com
Address: Physics Department, 118 Kinard Laboratory, Clemson, South Carolina 29634-0978, USA
CoI: Mark Leising, Clemson University
CoI: Peter Milne, Steward Observatory
Title: Physics of Supernovae Type Ia at Late Epochs
Abstract: We continue and extend studies of the late light curves of nearby Type Ia supernovae in the optical and near-infrared. Our goal is to measure the color evolution and UBVRIJHK power to late epochs (up to 600 days post explosion). With these observations, we can explore the thermodynamics of the ejecta, and investigate what appears to be excess power output at late times - possibly from the trapping of 56 Co positrons or interaction with circumstellar material. Our observations will also hint at the explosion mechanism and allow us to connect late time behavior to luminosity class. These late studies probe the intrinsic variations in SN Ia physics, which are vital to understanding to what extent they can be relied upon for cosmological studies.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360