Type Ia Supernovae in the Epoch of Deceleration

Details Type Ia Supernovae in the Epoch of Deceleration Type Ia Supernovae in the Epoch of Deceleration

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..300s&link_type=abstract

NOAO Proposal ID #2001B-0300

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We propose to find, and follow, 10-25 Type Ia supernovae in the redshift range 0.9< z< 1.2. These supernovae will be used to establish another point on the cosmological world line which will verify our results that Ω_(Lambda) > 0, or show that our technique is affected by systematic errors or unaccounted systematic effects. Such systematic effects, such as dust or a simple scale error which is linear in z, will make the distant supernovae too faint with respect to a Ω_(Lambda) > 0 cosmology. At z> 0.9, an (Ω_M,Ω_(Lambda))=(0.3,0.7) universe will be in deceleration, causing the supernovae to begin to brighten relative to an empty model. We will search for these SNe at Subaru and CFHT, obtain followup spectra at Keck and the VLT, and follow the optical photometry in U(R), B(I,Z), with HST, the Hawaii time, and with the Gemini-S Acquistion Camera. The most critical aspect of the proposal before you is to get V(J) data with Gemini-N NIRI, to allow us to measure colors of the supernovae near maximum light.

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