Measurements of the cosmological parameters omega and lambda from the first seven supernovae at z greater than or equal to 0.35

  title={Measurements of the cosmological parameters omega and lambda from the first seven supernovae at z greater than or equal to 0.35},
  author={Saul Perlmutter and Smail Gabi and Gerson. Goldhaber and Donald E. Groom and Isobel M. Hook and A. G. Kim and M. Y. Kim and J. C. Lee and Carlton R. Pennypacker and I. A. Small and A. Goobar and R. Pain and Richard S. Ellis and Richard G. McMahon and Brian J. Boyle and Peter Bunclark and Daniel Carter and Michael J. Irwin and Karl Glazebrook and Heidi Jo Newberg and Alexei V. Filippenko and Thomas Matheson and Michael A Dopita and Warrick J. Couch},
We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven of more than 28 supernovae discovered to date in the high-redshift supernova search of the Supernova Cosmology Project. We find an observational dispersion in peak magnitudes of ? -->MB=0.27; this dispersion narrows to ?MB, corr=0.19 after correcting the magnitudes using the light-curve width… Expand
Measurements of $\Omega$ and $\Lambda$ from 42 high redshift supernovae
We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discovered by the SupernovaExpand
The Acceleration of the Universe:. Measurements of Cosmological Parameters from Type Ia Supernovae
The fate of the Universe, infinite expansion or a ldquo;big crunchrdquo;, can be determined by measuring the redshifts and brightness of very distant supernovae. These provide a record of changes inExpand
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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 thatExpand
Significant effects of weak gravitational lensing on determinations of the cosmology from Type Ia supernovae
Significant adjustments to the values of the cosmological parameters estimated from high-redshift Type Ia supernovae data are reported, almost an order of magnitude greater than previously found.Expand
The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set
We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-colorExpand
Cosmological Results from High-z Supernovae* **
The High-z Supernova Search Team has discovered and observed eight new supernovae in the redshift interval z = 0.3-1.2. These independent observations, analyzed by similar but distinct methods,Expand
Constraints on Cosmological Models from Hubble Space Telescope Observations of High-z Supernovae
We have coordinated Hubble Space Telescope (HST) photometry with ground-based discovery for three supernovae: Type Ia supernovae near z ≈ 0.5 (SN 1997ce, SN 1997cj) and a third event at z = 0.97 (SNExpand
Results from the High-z Supernova Search Team
Abstract We review the use of Type Ia supernovae for cosmological distance determinations. Low-redshift SNe Ia (z≲0.1) demonstrate that (a) the Hubble expansion is linear, (b) H0=65±2 (statistical)Expand
We use a sample of 42 supernovae detected with the Advanced Camera for Surveys on-board the Hubble Space Telescope as part of the Great Observatories Origins Deep Survey to measure the rate of coreExpand
The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Curvature of the Universe Usin
The High-Z Supernova Search is an international collaboration to discover and monitor Type Ia supernovae (SNe Ia) at z > 0.2 with the aim of measuring cosmic deceleration and global curvature. OurExpand


Feasibility of measuring the cosmological constant {Lambda} and mass density {Omega} using Type Ia supernovae
We explore the feasibility of resurrecting the apparent magnitude-redshift relation for a 'standard candle' to measure the cosmological constant and mass density. We show that type Ia supernovae, ifExpand
The Type Ia Supernova Rate at z ~ 0.4
We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived by using a large subset of data from the Supernova Cosmology Project. Three supernovae wereExpand
The discovery of a type Ia supernova at a redshift of 0.31
OBSERVATIONS indicate that nearby supernova of type Ia have similar peak brightnesses, with a spread of less than 0.3 mag (ref. 1), so that they can potentially be used as 'standard candles' toExpand
A Supernova at z = 0.458 and Implications for Measuring theCosmological Deceleration
We have begun a program to discover high-redshift supernovae ($z \approx$ 0.25--0.5), and study them with follow-up photometry and spectroscopy. We report here our first discovery, a supernova at $zExpand
Comparison of velocity and gravity fields: the mark III tully-fisher catalog versus the iras 1.2 jy survey
We consider a measure of the peculiar velocity field derived from the Mark III compilation of 2900 spiral galaxies (Willick et al.), using an analysis method that is substantially free of biasExpand
The extension of the Hubble diagram. II - New redshifts and photometry of very distant galaxy clusters - First indication of a deviation of the Hubble diagram from a straight line
Redshifts are given for 50 brightest cluster galaxies, extending as far as z = 0.75; BVR photometry is given for 33 clusters. These data are combined with earlier data of a similar kind in order toExpand
A Generalized K correction for type Ia supernovae: Comparing R band photometry beyond z = 0.2 with B, V, and R band nearby photometry
Photometric measurements show that, as a group, nearby Type Ia supernovae follow similar light curves and reach similar peak magnitudes (Branch & Tammann 1992). Thus, these supernovae may serve asExpand
Statistical Connections between the Properties of Type IA Supernovae and the B-V Colors of Their Parent Galaxies, and the Value of H 0
Statistical connections between the properties of Type Ia supernovae (SNe Ia) and the B--V colors of their parent galaxies are established. Compared to SNe Ia in blue galaxies [B-V$\la$0.75], SNe IaExpand
Effects of Weak Gravitational Lensing from Large-Scale Structure on the Determination of q 0
Weak gravitational lensing by large-scale structure affects the determination of the cosmological deceleration parameter q0. We find that the lensing induced dispersions on truly standard candles areExpand
The Absolute Magnitudes of Type IA Supernovae
Absolute magnitudes in the B, V, and I bands are derived for nine well-observed Type Ia supernovae, using host galaxy distances estimated via the surface brightness fluctuations or Tully-FisherExpand