Measurements of Ω and Λ from 42 High-Redshift Supernovae
- S. Perlmutter, G. Aldering, The Supernova Cosmology Project
- Physics
- 1 December 1998
We report measurements of the mass density, ΩM, and cosmological-constant energy density, ΩΛ, of the universe based on the analysis of 42 type Ia supernovae discovered by the Supernova Cosmology…
THE HUBBLE SPACE TELESCOPE CLUSTER SUPERNOVA SURVEY. V. IMPROVING THE DARK-ENERGY CONSTRAINTS ABOVE z > 1 AND BUILDING AN EARLY-TYPE-HOSTED SUPERNOVA SAMPLE
We present Advanced Camera for Surveys, NICMOS, and Keck adaptive-optics-assisted photometry of 20 Type Ia supernovae (SNe Ia) from the Hubble Space Telescope (HST) Cluster Supernova Survey. The SNe…
SPECTRA AND HUBBLE SPACE TELESCOPE LIGHT CURVES OF SIX TYPE Ia SUPERNOVAE AT 0.511 < z < 1.12 AND THE UNION2 COMPILATION
- R. Amanullah, C. Lidman, N. Yasuda
- Physics
- 10 April 2010
We report on work to increase the number of well-measured Type Ia supernovae (SNe Ia) at high redshifts. Light curves, including high signal-to-noise Hubble Space Telescope data, and spectra of six…
Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets
- M. Kowalski, D. Rubin, J. Yun
- Physics
- 25 April 2008
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This…
Rates and Properties of Type Ia Supernovae as a Function of Mass and Star Formation in Their Host Galaxies
- M. Sullivan, D. Le Borgne, C. Tao
- Physics
- 18 May 2006
We show that Type Ia supernovae (SNe Ia) are formed within both very young and old stellar populations, with observed rates that depend on the stellar mass and mean star formation rates (SFRs) of…
The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints ,
- J. Guy, M. Sullivan, E. Walker
- Physics
- 22 October 2010
Aims. We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1)
discovered during the first three years of the Supernova Legacy Survey…
SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY
We combine high-redshift Type Ia supernovae from the first three years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality…
The dependence of Type Ia Supernovae luminosities on their host galaxies
- M. Sullivan, A. Conley, E. Walker
- Physics
- 26 March 2010
Precision cosmology with Type la supernovae (SNe Ia) makes use of the fact that SN Ia luminosities depend on their light-curve shapes and colours. Using Supernova Legacy Survey (SNLS) and other data,…
SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES
- M. Sullivan, J. Guy, E. Walker
- Physics
- 7 April 2011
We present observational constraints on the nature of dark energy using the Supernova Legacy Survey three-year sample (SNLS3) of Guy et al. and Conley et al. We use the 472 Type Ia supernovae (SNe…
New Constraints on ΩM, ΩΛ, and w from an Independent Set of 11 High-Redshift Supernovae Observed with the Hubble Space Telescope
- R. Knop, G. Aldering, N. Yasuda
- Physics
- 20 November 2003
We report measurements of ΩM, ΩΛ, and w from 11 supernovae (SNe) at z = 0.36-0.86 with high-quality light curves measured using WFPC2 on the Hubble Space Telescope (HST). This is an independent set…
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