Nino Panagia
Space Telescope Science Institute
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Publication
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The Astrophysical Journal | 1999
S. Perlmutter; G. Aldering; G. Goldhaber; Robert Andrew Knop; Peter E. Nugent; P. G. Castro; S. E. Deustua; S. Fabbro; Ariel Goobar; Donald E. Groom; I. M. Hook; A. G. Kim; M. Y. Kim; Julia C. Lee; N. J. Nunes; R. Pain; Carlton R. Pennypacker; Robert Michael Quimby; C. Lidman; Richard S. Ellis; M. J. Irwin; Richard G. McMahon; Pilar Ruiz-Lapuente; Nancy A. Walton; Bradley E. Schaefer; B. J. Boyle; A. V. Filippenko; Thomas Matheson; Andrew S. Fruchter; Nino Panagia
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 Supernova Cosmology Project. The magnitude-redshift data for these SNe, at redshifts between 0.18 and 0.83, are fit jointly with a set of SNe from the Calan/Tololo Supernova Survey, at redshifts below 0.1, to yield values for the cosmological parameters. All SN peak magnitudes are standardized using a SN Ia lightcurve width-luminosity relation. The measurement yields a joint probability distribution of the cosmological parameters that is approximated by the relation 0.8 Omega_M - 0.6 Omega_Lambda ~= -0.2 +/- 0.1 in the region of interest (Omega_M 0) = 99%, including the identified systematic uncertainties. The best-fit age of the universe relative to the Hubble time is t_0 = 14.9{+1.4,-1.1} (0.63/h) Gyr for a flat cosmology. The size of our sample allows us to perform a variety of statistical tests to check for possible systematic errors and biases. We find no significant differences in either the host reddening distribution or Malmquist bias between the low-redshift Calan/Tololo sample and our high-redshift sample. The conclusions are robust whether or not a width-luminosity relation is used to standardize the SN peak magnitudes.
The Astrophysical Journal | 2003
Robert Andrew Knop; Isobel M. Hook; C. Lidman; Bradley E. Schaefer; A. Conley; B.C. Lee; Andrew S. Fruchter; Ariel Goobar; Nino Panagia; M. Sullivan; Gaston Folatelli; S. Nobili; G. Goldhaber; V. Stanishev; Sebastien Fabbro; William Michael Wood-Vasey; G. Sainton; Guillaume Blanc; Eric P. Smith; J. Raux; Nancy A. Walton; G. Garavini; A. G. Kim; Rachel Annette Gibbons; Mamoru Doi; Juan E. Mendez; P. Astier; Carlton R. Pennypacker; K. Garton; G. Aldering
We report measurements of
The Astrophysical Journal | 2012
Nao Suzuki; D. Rubin; C. Lidman; Gregory Scott Aldering; R. Amanullah; K. Barbary; L. F. Barrientos; J. Botyánszki; Mark Brodwin; Natalia Connolly; Kyle S. Dawson; Arjun Dey; Mamoru Doi; Megan Donahue; Susana Elizabeth Deustua; Peter R. M. Eisenhardt; Erica Ellingson; L. Faccioli; V. Fadeyev; H. K. Fakhouri; Andrew S. Fruchter; David G. Gilbank; Michael D. Gladders; G. Goldhaber; Anthony H. Gonzalez; Ariel Goobar; A. Gude; T. Hattori; Henk Hoekstra; E. Y. Hsiao
\Omega_M
The Astrophysical Journal | 2010
Rahman Amanullah; C. Lidman; D. Rubin; Gregory Scott Aldering; P. Astier; K. Barbary; M. S. Burns; A. Conley; Kyle S. Dawson; Susana Elizabeth Deustua; Mamoru Doi; S. Fabbro; L. Faccioli; H. K. Fakhouri; Gaston Folatelli; Andrew S. Fruchter; Hisanori Furusawa; G. Garavini; G. Goldhaber; Ariel Goobar; Donald E. Groom; I. M. Hook; D. A. Howell; Nobunari Kashikawa; A. G. Kim; R. A. Knop; M. Kowalski; Eric V. Linder; Joshua Meyers; S. Nobili
,
The Astrophysical Journal | 2005
Emanuele Daddi; Alvio Renzini; Norbert Pirzkal; A. Cimatti; Sangeeta Malhotra; Massimo Stiavelli; Cong Kevin Xu; Anna Pasquali; James E. Rhoads; M. Brusa; S. di Serego Alighieri; Henry C. Ferguson; Anton M. Koekemoer; Leonidas A. Moustakas; Nino Panagia; Rogier A. Windhorst
\Omega_\Lambda
The Astronomical Journal | 2006
Steven V. W. Beckwith; Massimo Stiavelli; Anton M. Koekemoer; John A. R. Caldwell; Henry C. Ferguson; Richard N. Hook; Ray A. Lucas; Louis E. Bergeron; Michael R. Corbin; Shardha Jogee; Nino Panagia; Massimo Robberto; Patricia Royle; Rachel S. Somerville; Megan L. Sosey
, and w from eleven supernovae at z=0.36-0.86 with high-quality lightcurves measured using WFPC-2 on the HST. This is an independent set of high-redshift supernovae that confirms previous supernova evidence for an accelerating Universe. Combined with earlier Supernova Cosmology Project data, the new supernovae yield a flat-universe measurement of the mass density
The Astronomical Journal | 2006
Margaret M. Meixner; Karl D. Gordon; Remy Indebetouw; Joseph L. Hora; Barbara A. Whitney; R. D. Blum; William T. Reach; Jean Philippe Bernard; Marilyn R. Meade; B. L. Babler; C. W. Engelbracht; B.-Q. For; Karl Anthony Misselt; Uma P. Vijh; Claus Leitherer; Martin Cohen; Ed B. Churchwell; F. Boulanger; Jay A. Frogel; Yasuo Fukui; J. S. Gallagher; Varoujan Gorjian; Jason Harris; Douglas M. Kelly; Akiko Kawamura; So Young Kim; William B. Latter; S. Madden; Ciska Markwick-Kemper; Akira Mizuno
\Omega_M=0.25^{+0.07}_{-0.06}
Astronomy and Astrophysics | 2005
F. Mannucci; M. Della Valle; Nino Panagia; E. Cappellaro; G. Cresci; R. Maiolino; A. R. Petrosian; Massimo Turatto
(statistical)
Monthly Notices of the Royal Astronomical Society | 2006
F. Mannucci; M. Della Valle; Nino Panagia
\pm0.04
The Astrophysical Journal | 2001
G. Goldhaber; Donald E. Groom; Alex G. Kim; G. Aldering; P. Astier; A. Conley; S. E. Deustua; Richard S. Ellis; S. Fabbro; Andrew S. Fruchter; Ariel Goobar; I. Hook; M. J. Irwin; M. Y. Kim; Robert Andrew Knop; C. Lidman; Richard McMahon; Peter E. Nugent; R. Pain; Nino Panagia; Carlton R. Pennypacker; S. Perlmutter; Pilar Ruiz-Lapuente; Bradley E. Schaefer; Nancy A. Walton; T. York
(identified systematics), or equivalently, a cosmological constant of
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