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Session 95 - Cosmological Parameters and Large Scale Structure Formation.
Oral session, Friday, January 09
International Ballroom Center,

[95.01] Measurements of the Cosmological Parameters Ømega and \Lambda from High-Redshift Supernovae

R. A. Knop, G. Aldering, S. Deustua, S. Fabbro, G. Goldhaber, D. E. Groom, A. G. Kim, M. Y. Kim, P. Nugent, C. R. Pennypacker, S. Perlmutter (LBNL/CfPA, Berkeley), M. Della Valle (U. Padova), R. S. Ellis, R. G. McMahon, N. Walton (IoA), A. Fruchter, N. Panagia (STScI), A. Goobar (U. Stockholm), I. M. Hook, C. Lidman (ESO), R. Pain (CRNS-IN2P3), P. Ruiz-Lapuente (U. Barcelona), B. Schaefer (Yale)

High-redshift supernovae are a significant new tool for measuring the cosmological parameters Ømega_0 and \Lambda that describe our expanding universe. We have shown that the rare, random, and transient supernovae can be systematically detected and studied at high redshifts. So far, we have discovered and studied \sim50 supernovae at redshifts z = 0.18 -- 0.83, and identified most of these as Type Ia supernovae. Using these supernovae as ``calibrated candles,'' we can perform measurements of the cosmological parameters. Our first seven supernovae produced a confidence strip on the Ømega-\Lambda plane. Recent results with supernovae at higher redshifts, coupled with high quality light curves measured by the HST, allow us to close the contours in this confidence region, providing independent measurements of Ømega_M and \Lambda.

Program listing for Friday