The Nature of Dark Energy from Type Ia Supernovae

Details The Nature of Dark Energy from Type Ia Supernovae The Nature of Dark Energy from Type Ia Supernovae

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..111h&link_type=abstract

NOAO Proposal ID #2007B-0111

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Type Ia supernovae (SNe Ia) currently provide the most direct evidence for an accelerating Universe and the existence of an unknown "dark energy". We are now entering the final year of the Supernova Legacy Survey (SNLS), whch is generating a definitive dataset with well-sampled g'r'i'z' light curves and spectroscopic confirmation. With the full sample we expect to determine the cosmological equation of state parameter to a statistical precision better than +/-0.05, testing theories for the nature of dark energy. Spectroscopy is central to the survey's success. Approximately 500 SNe Ia will be spectroscopically confirmed in a coherent program involving Gemini, VLT and Keck. This is the continuation of our core SNLS proposal, and aims to obtain types and redshifts for 30 SN Ia candidates with redshifts 0.6-0.9. A companion proposal (PI Howell) aims to increase the legacy value of the entire survey. This is a quick response proposal for GMOS-N.

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