Cosmology with CMAGIC

Details Cosmology with CMAGIC Cosmology with CMAGIC

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.8212c&link_type=abstract

American Astronomical Society Meeting 203, #82.12; Bulletin of the American Astronomical Society, Vol. 35, p.1335

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We present Ω m,Ω Λ results based on a recently developed technique for analyzing the lightcurves of Type Ia supernovae. This technique (CMAGIC, for Color-Magnitude Intercept Calibration (Wang et al. 2003)) is based on the empirical uniformity of SNe Ia color-magnitude diagrams after maximum light, and has advantages over maximum-magnitude fits. In particular, CMAGIC is less affected by host-galaxy dust extinction. This result, based on 12 high redshift SNe Ia, provides a powerful check on previous cosmological results using Type Ia supernovae that have shown that the expansion of the universe is accelerating.

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