Four papers by the Supernova Cosmology Project: (1) Scheduled discoveries of 7+ high-redshift supernovae -- First cosmology results and bounds on q(sub 0); (2) K corrections for Type Ia supernovae and a test for spatial variation of the Hubble constant; (3) Observation of cosmological time dilation using Type Ia supernovae as clocks; (4) The Type Ia supernova rate at z (approximately) 0.4

摘要

The search for high-redshift Type Ia supernovae discovered, in its first years, a sample of seven supernovae. Using a 'batch' search strategy, almost all were discovered before maximum light and were observed over the peak of their light curves. The spectra and light curves indicate that almost all were Type Ia supernovae at redshifts z = 0.35--0.5. These high-redshift supernovae can provide a distance indicator and 'standard clock' to study the cosmological parameters q(sub 0), (Lambda), (Omega)(sub 0), and H(sub 0). These four presentations discuss observation strategies and rates, analysis and calibration issues, the sources of measurement uncertainty, and the cosmological implications, including bounds on q(sub 0), of these first high-redshift supernovae from the ongoing search.