Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

  title={Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant},
  author={Adam G. Riess and Alexei V. Filippenko and Peter M. Challis and Alejandro Clocchiatti and Alan H. Diercks and Peter M. Garnavich and Ronald L. Gilliland and Craig Hogan and Saurabh W. Jha and Robert P. Kirshner and Bruno Leibundgut and Mark M. Phillips and David J. Reiss and Brian P. Schmidt and Robert A. Schommer and R. C. Smith and Jason Spyromilio and Christopher W. Stubbs and Nicholas B. Suntzeff and John L. Tonry},
  journal={The Astronomical Journal},
  pages={1009 - 1038}
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 ≤ z ≤ 0.62. The luminosity distances of these objects are determined by methods that employ relations between SN Ia luminosity and light curve shape. Combined with previous data from our High-z Supernova Search Team and recent results by Riess et al., this expanded set of 16 high-redshift supernovae and a set of 34 nearby supernovae are used to place constraints on the following… 

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