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[11.15] New Limits on \Omega_M and \Omega_\Lambda From High Redshift Supernovae With High Quality Color Measurements

S. Perlmutter (Lawrence Berkeley National Laboratory), Supernova Cosmology Project Collaboration

We present the final analysis of a set of Type Ia supernovae observed by the Supernova Cosmology Project with the Hubble Space Telescope. These supernova provide new, more precise limits on \Omega_M and \Omega_\Lambda. As an independent set of high-redshift supernovae, these data provide an important confirmation of the previous accelerating universe results from supernovae. Moreover, these events have much higher quality color measurements than was previously available, allowing direct host galaxy extinction corrections of each individual event without the need to resort to a biasing extinction prior. These color corrections show that the cosmological results are robust.

This work is supported by the U.S. Dept. of Energy, Office of Science, under contract DE-AC03-76SF00098.

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.