Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
Saul Perlmutter,Greg Aldering,M. Della Valle,Susana E. Deustua,Richard S. Ellis,Sebastien Fabbro,A. S. Fruchter,G. Goldhaber,A. Goobar,D. E. Groom,I. M. Hook,A. G. Kim,M. Y. Kim,R. A. Knop,C. Lidman,R. G. McMahon,Peter Nugent,R. Pain,Nino Panagia,C. R. Pennypacker,P. Ruiz-Lapuente,B. E. Schaefer,Nicholas A. Walton +22 more
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TLDR
In this paper, the authors reported the discovery of a Type Ia supernova (SN 1997ap) at z = 0.83 at the Keck II 10m telescope.Abstract:
The ultimate fate of the universe, infinite expansion or a big crunch, can be determined by measuring the redshifts, apparent brightnesses, and intrinsic luminosities of very distant supernovae. Recent developments have provided tools that make such a program practicable: (1) Studies of relatively nearby Type Ia supernovae (SNe Ia) have shown that their intrinsic luminosities can be accurately determined; (2) New research techniques have made it possible to schedule the discovery and follow-up observations of distant supernovae, producing well over 50 very distant (z = 0.3 -- 0.7) SNe Ia to date. These distant supernovae provide a record of changes in the expansion rate over the past several billion years. By making precise measurements of supernovae at still greater distances, and thus extending this expansion history back far enough in time, we can distinguish the slowing caused by the gravitational attraction of the universe's mass density Omega_M from the effect of a possibly inflationary pressure caused by a cosmological constant Lambda. We report here the first such measurements, with our discovery of a Type Ia supernova (SN 1997ap) at z = 0.83. Measurements at the Keck II 10-m telescope make this the most distant spectroscopically confirmed supernova. Over two months of photometry of SN 1997ap with the Hubble Space Telescope and ground-based telescopes, when combined with previous measurements of nearer SNe Ia, suggests that we may live in a low mass-density universe. Further supernovae at comparable distances are currently scheduled for ground and space-based observations.read more
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References
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Journal ArticleDOI
The Absolute Magnitudes of Type IA Supernovae
TL;DR: In this paper, absolute magnitudes in the B, V, and I bands were derived for nine well-observed Type Ia supernovae, using host galaxy distances estimated via the surface brightness fluctuations or Tully-Fisher methods.
Journal ArticleDOI
The Cosmological constant
TL;DR: In this article, the cosmological constant problem is examined in the context of both astronomy and physics with reference to expansion dynamics, the age of the universe, distance measures, comoving density of objects, growth of linear perturbations, and gravitational lens probabilities.
Journal ArticleDOI
Measurements* of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z ≥ 0.35
Saul Perlmutter,Saul Perlmutter,S. Gabi,S. Gabi,Gerson Goldhaber,Gerson Goldhaber,Ariel Goobar,Ariel Goobar,Ariel Goobar,D. E. Groom,D. E. Groom,I. M. Hook,A. G. Kim,A. G. Kim,Min Kook Kim,Julia C. Lee,R. Pain,R. Pain,Carlton R. Pennypacker,Carlton R. Pennypacker,I. A. Small,I. A. Small,Richard S. Ellis,Richard G. McMahon,B. J. Boyle,P. S. Bunclark,David Carter,Mike Irwin,Karl Glazebrook,H. J. M. Newberg,Alexei V. Filippenko,Thomas Matheson,Michael A. Dopita,Warrick J. Couch +33 more
TL;DR: In this article, the authors used a light-curve width-corrected magnitudes as a function of redshift of distant (z = 0.35-0.46) supernovae to obtain a global measurement of the mass density.
Journal ArticleDOI
The photometric performance and calibration of wfpc2
Jon A. Holtzman,Christopher J. Burrows,Stefano Casertano,J. Jeff Hester,John T. Trauger,Alan M. Watson,Guy Worthey +6 more
TL;DR: In this paper, the photometric performance and calibration of the Wide Field Planetary Camera 2 (WFPC2) on the Hubble Space Telesopce (HST) were discussed, with particular attention given to charge transfer efficiency (CTE) effects, contamination effects in the ultraviolet (UV), and flat field accuracy and normalization.
Journal ArticleDOI
The Absolute Luminosities of the Calan/Tololo Type IA Supernovae
TL;DR: In this article, the absolute luminosities of 29 SNe Ia in the Calan/Tololo survey were examined and a relation between the peak luminosity of the SNe and the decline rate as measured by the light curve was found.
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