Mathematics – Logic
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.1612s&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #16.12; Bulletin of the American Astronomical Society, Vol. 33, p.1333
Mathematics
Logic
1
Scientific paper
Distant type Ia supernovae have been used as calibrated standard candles out to z=0.8 (\bar{z} ~= 0.55) to measure the combination ~ Ω M - Ω Λ using the classical magnitude-redshift relation. Extending the redshift range will reduce and eventually break the (Ω M,Ω Λ ) degeneracy, and also discriminate between a non-zero cosmological constant and models of hypothetical intergalactic grey dust. We present here preliminary results from the most recent very high-redshift (z ~ 1) Type Ia supernova searches of the Supernova Cosmology Project. The supernovae were discovered at the CFHT 3.6-m telescope using the CFH12k camera (run in queue mode), the CTIO 4-m telescope using the MOSAIC camera and the Subaru 8.2-m telescope using SuprimeCam. The observations were coordinated with spectroscopic follow-up at Keck, VLT, and Subaru. The optical photometric follow-up was obtained at WIYN, WHT, and TNG for the brighter supernovae, and at HST for the faintest supernovae. The VLT and Gemini made possible the near-IR photometric follow up. This work was supported in part by the NASA Space Telescope Science Institute.
Aldering Greg
Amanullah Rahman
Antilogus Pierre
Astier Pierre
Balland Christophe
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