NOAO >   Observing Info >   Approved Programs >   2016B-0161

Small NOAO Logo

Program Information for 2016B-0161


PI: Ryan Foley, U. of Illinois Urbana-Champaign, foley@ucsc.edu
Address: Department of Astronomy, 103 Astronomy Building, 1002 West Green Street, Urbana, IL, 61801 USA

CoI: Michael Childress, University of Southampton
CoI: Luiz de Costa, LineA
CoI: Chris D'Andrea, University of Portsmouth
CoI: Tamara Davis, University of Queensland
CoI: Josh Frieman, FNAL
CoI: Richard Kessler, U. of Chicago
CoI: Alex Kim, Lawrence Berkeley National Laboratory
CoI: Chris Lidman, Australian Astronomical Observatory
CoI: Yen-Chen Pan, U. of Illinois Urbana-Champaign
CoI: Masao Sako, U. of Pennsylvania
CoI: Daniel Scolnic, U. of Chicago
CoI: R Chris Smith, NOAO
CoI: Mat Smith, University of Southampton
CoI: Mark Sullivan, University of Southampton
CoI: William Wester, FNAL
CoI: Fang Yuan, Australian National U.

Title: DES Supernova Cosmology

Abstract: For measuring the nature of dark energy, Type Ia supernovae (SN Ia) are currently limited by the poorly constrained redshift evolution of SN Ia intrinsic colors. Current constraints allow for a large, 10% bias in the measurement of the equation-of-state parameter for dark energy. Luckily, a SN's ejecta velocity is highly correlated with its intrinsic color, but uncorrelated with other properties such as luminosity. With Gemini spectroscopy, we can measure the ejecta velocity for a sample of high-z SNe Ia and determine if SN Ia intrinsic color evolves, on average, with redshift. With these data, we can correct for any potential bias to a subdominant level. This program is critical for the success of both the SN component and the entirety of DES.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 2 (2016B):  GEM-SQ/GMOSS -- 19.9hrs band 2 (GS-2016B-Q-41)


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2016B-0161

noaoprop-help@noao.edu

Small NOAO Logo