Initial Hubble Diagram Results from the Nearby Supernova Factory

Details Initial Hubble Diagram Results from the Nearby Supernova Factory Initial Hubble Diagram Results from the Nearby Supernova Factory

2008-10-20

arxiv.org/abs/0810.3499v2

Astronomy and Astrophysics

Astrophysics

Short version of proceedings for ICHEP08, Philadelphia PA, July 2008; see v1 for full-length version

Scientific paper

The use of Type Ia supernovae as distance indicators led to the discovery of the accelerating expansion of the universe a decade ago. Now that large second generation surveys have significantly increased the size and quality of the high-redshift sample, the cosmological constraints are limited by the currently available sample of ~50 cosmologically useful nearby supernovae. The Nearby Supernova Factory addresses this problem by discovering nearby supernovae and observing their spectrophotometric time development. Our data sample includes over 2400 spectra from spectral timeseries of 185 supernovae. This talk presents results from a portion of this sample including a Hubble diagram (relative distance vs. redshift) and a description of some analyses using this rich dataset.

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