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

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..193h&link_type=abstract

NOAO Proposal ID #2008A-0193

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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". 2008A is the final semester 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. At the end of the survey about 450 SNe Ia will be spectroscopically confirmed in a coherent program involving Gemini, VLT and Keck. This final real-time spectroscopy proposal aims to obtain types and redshifts for 22 SN Ia candidates with redshifts 0.6-0.9. This is a standard response ToO proposal.

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