Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
M. Kowalski,David Rubin,Greg Aldering,Rui J. Agostinho,Alexis Amadon,Rahman Amanullah,C. Balland,Kyle Barbary,Guillermo A. Blanc,Peter Challis,Alex Conley,Natalia Connolly,R. A. Covarrubias,Kyle S. Dawson,Susana E. Deustua,Richard S. Ellis,Sebastien Fabbro,Vitaliy Fadeyev,Xiaohui Fan,B. Farris,G. Folatelli,Brenda Frye,G. Garavini,Elinor L. Gates,G. Goldhaber,Bertrand Goldman,A. Goobar,D. E. Groom,J. Haissinski,D. Hardin,I. M. Hook,Steve Kent,A. G. Kim,R. A. Knop,C. Lidman,Eric V. Linder,Javier Méndez,J. Meyers,G. J. Miller,M. Moniez,A. Mourao,Heidi Jo Newberg,S. Nobili,Peter Nugent,Reynald Pain,O. Perdereau,Saul Perlmutter,M. M. Phillips,V. Prasad,R. M. Quimby,Nicolas Regnault,Jeffrey A. Rich,E. P. Rubenstein,P. Ruiz-Lapuente,F. D. Santos,B. E. Schaefer,R. A. Schommer,Robert Connon Smith,Alicia M. Soderberg,A. L. Spadafora,M. Strovink,N. B. Suntzeff,Nao Suzuki,R. C. Thomas,N. A. Walton,Lian-Tao Wang,W. M. Wood-Vasey,Joao Lin Yun +67 more
TLDR
In this article, the authors present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compilations.Abstract:
We present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compilations. This ``Union'' compilation of 414 SN Ia, which reduces to 307 SNe after selection cuts, includes the recent large samples of SNe Ia from the Supernova Legacy Survey and ESSENCE Survey, the older datasets, as well as the recently extended dataset of distant supernovae observed with HST. A single, consistent and blind analysis procedure is used for all the various SN Ia subsamples, and a new procedure is implemented that consistently weights the heterogeneous data sets and rejects outliers. We present the latest results from this Union compilation and discuss the cosmological constraints from this new compilation and its combination with other cosmological measurements (CMB and BAO). The constraint we obtain from supernovae on the dark energy density is $\Omega_\Lambda= 0.713^{+0.027}_{-0.029} (stat)}^{+0.036}_{-0.039} (sys)}$, for a flat, LCDM Universe. Assuming a constant equation of state parameter, $w$, the combined constraints from SNe, BAO and CMB give $w=-0.969^{+0.059}_{-0.063}(stat)^{+0.063}_{-0.066} (sys)$. While our results are consistent with a cosmological constant, we obtain only relatively weak constraints on a $w$ that varies with redshift. In particular, the current SN data do not yet significantly constrain $w$ at $z>1$. With the addition of our new nearby Hubble-flow SNe Ia, these resulting cosmological constraints are currently the tightest available.read more
Citations
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Scalar field cosmology in the energy phase-space -- unified description of dynamics
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The dark side of curvature
TL;DR: In this article, the degeneracy between the dark energy equation of state parameter w(z), and the spatial curvature Omega_k in a direct, model-independent way is investigated.
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Properties and uncertainties of scalar field models of dark energy with barotropic equation of state
TL;DR: In this article, the authors analyzed the dynamics of expansion and large scale structure formation in the multicomponent universe with dark energy modeled by the minimally coupled scalar field with generalized linear barotropic equation of state.
References
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Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Saul Perlmutter,Greg Aldering,Gerson Goldhaber,Gerson Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,Sebastien Fabbro,A. Goobar,A. Goobar,Donald E. Groom,I. M. Hook,I. M. Hook,A. G. Kim,A. G. Kim,A. G. Kim,M. Y. Kim,Julia C. Lee,Julia C. Lee,Nelson J. Nunes,Nelson J. Nunes,Reynald Pain,Reynald Pain,C. R. Pennypacker,C. R. Pennypacker,Robert Quimby,Christopher Lidman,Richard S. Ellis,Mike Irwin,Richard G. McMahon,Pilar Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Nino Panagia,Heidi Jo Newberg,Warrick J. Couch +44 more
TL;DR: In this paper, the mass density, Omega_M, and cosmological-constant energy density of the universe were measured using the analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology project.
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Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant To Appear in the Astronomical Journal
Adam G. Riess,Alexei V. Filippenko,Peter Challis,A. Clocchiatti,Alan H. Diercks,R. L. Gilliland,Craig J. Hogan,Saurabh Jha,Robert P. Kirshner,Bruno Leibundgut,David J Reiss,Brian P. Schmidt,Robert A. Schommer,R. Chris Smith,Jason Spyromilio,Christopher W. Stubbs,Nicholas B. Suntzeff,John L. Tonry +17 more
TL;DR: The spectral and photometric observations of 10 type Ia supernovae (SNe Ia) in the redshift range 0.16 � z � 0.62 were presented in this paper.
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Detection of the baryon acoustic peak in the large-scale correlation function of SDSS luminous red galaxies
Daniel J. Eisenstein,Daniel J. Eisenstein,Idit Zehavi,David W. Hogg,Roman Scoccimarro,Michael R. Blanton,Robert C. Nichol,Ryan Scranton,Hee-Jong Seo,Max Tegmark,Max Tegmark,Zheng Zheng,Scott F. Anderson,James Annis,Neta A. Bahcall,Jon Brinkmann,Scott Burles,Francisco J. Castander,Andrew J. Connolly,István Csabai,Mamoru Doi,Masataka Fukugita,Joshua A. Frieman,Joshua A. Frieman,Karl Glazebrook,James E. Gunn,John S. Hendry,Greg Hennessy,Zeljko Ivezic,Stephen M. Kent,Gillian R. Knapp,Huan Lin,Yeong Shang Loh,Robert H. Lupton,Bruce Margon,Timothy A. McKay,Avery Meiksin,Jeffrey A. Munn,Adrian Pope,Michael W. Richmond,David J. Schlegel,Donald P. Schneider,Kazuhiro Shimasaku,Chris Stoughton,Michael A. Strauss,Mark SubbaRao,Mark SubbaRao,Alexander S. Szalay,István Szapudi,Douglas L. Tucker,Brian Yanny,Donald G. York +51 more
TL;DR: In this paper, a large-scale correlation function measured from a spectroscopic sample of 46,748 luminous red galaxies from the Sloan Digital Sky Survey is presented, which demonstrates the linear growth of structure by gravitational instability between z ≈ 1000 and the present and confirms a firm prediction of the standard cosmological theory.
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