Upcoming Events

Dark Energy and First Pan-STARRs Results

December 11, 2013 11:00AM to 12:00PM
Presenter 
Dan Scolnic, John Hopkins University
Location 
Building 362, Room F108
Type 
Seminar
Series 
Abstract:
The Pan-STARRs supernova survey has discovered one of the largest samples of Type Ia supernovae. Measurements of the distances to these supernovae allow us to probe some of the most fundamental questions about the properties of the universe like what is dark energy. When combining measurements from various astrophysical probes, we find interesting tension with the Lambda-CDM model. I discuss the various combinations of astrophysical probes and the source of this tension. It is possible that this tension is due to systematic uncertainties in the various measurements, and I show how we analyze these uncertainties in the Pan-STARRs sample. The Pan-STARRs survey has now discovered 20x more supernovae than those examined in our first analysis. I elaborate on how problems that we are currently tackling with the Pan-STARRs analysis will be faced by the DES survey and I present ways that joint efforts between these collaborations can overcome these difficult challenges.