SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY

被引：682

作者：

Conley, A. ^{[1
,2
]}

Guy, J. ^{[3
]}

Sullivan, M. ^{[4
]}

Regnault, N. ^{[3
]}

Astier, P. ^{[3
]}

Balland, C. ^{[3
,5
]}

Basa, S. ^{[6
]}

Carlberg, R. G. ^{[1
]}

Fouchez, D. ^{[7
,8
]}

Hardin, D. ^{[3
]}

Hook, I. M. ^{[4
,9
]}

Howell, D. A. ^{[10
,11
]}

Pain, R. ^{[3
]}

Palanque-Delabrouille, N. ^{[12
]}

Perrett, K. M. ^{[1
,13
]}

Pritchet, C. J. ^{[14
]}

Rich, J. ^{[12
]}

Ruhlmann-Kleider, V. ^{[12
]}

Balam, D. ^{[14
]}

Baumont, S. ^{[15
]}

Ellis, R. S. ^{[4
,16
]}

Fabbro, S. ^{[14
,17
,18
]}

Fakhouri, H. K. ^{[19
]}

Fourmanoit, N. ^{[3
]}

Gonzalez-Gaitan, S. ^{[1
]}

Graham, M. L. ^{[14
]}

Hudson, M. J. ^{[20
]}

Hsiao, E. ^{[19
]}

Kronborg, T. ^{[3
]}

Lidman, C. ^{[21
]}

Mourao, A. M. ^{[17
,18
]}

Neill, J. D.

Perlmutter, S. ^{[19
,22
]}

Ripoche, P. ^{[3
,19
]}

Suzuki, N. ^{[19
]}

Walker, E. S. ^{[4
,23
]}

机构：

[1] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[2] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA

[3] Univ Paris 07, Univ Paris 06, LPNHE, CNRS IN2P3, F-75252 Paris 05, France

[4] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England

[5] Univ Paris 01, F-91405 Orsay, France

[6] CNRS, LAM, F-13388 Marseille 13, France

[7] CNRS IN2P3, CPPM, F-13288 Marseille 9, France

[8] Univ Aix Marseille 2, F-13288 Marseille, France

[9] INAF Osservatorio Astron Roma, I-00040 Monte Porzio Catone, RM, Italy

[10] Global Telescope Network, Las Cumbres Observ, Goleta, CA 93117 USA

[11] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[12] CEA, Ctr Saclay, Irfu SPP, F-91191 Gif Sur Yvette, France

[13] DRDC Ottawa, Network Informat Operat, Ottawa, ON K1A 0Z4, Canada

[14] Univ Victoria, Dept Phys & Astron, Victoria, BC V8T 1M8, Canada

[15] CNRS IN2P3, LPSC, F-38026 Grenoble, France

[16] CALTECH, Dept Astrophys, Pasadena, CA 91125 USA

[17] CENTRA Ctr M Astrofis, Lisbon, Portugal

[18] IST, Dept Phys, Lisbon, Portugal

[19] LBNL, Berkeley, CA 91125 USA

[20] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[21] Australian Astron Observ, Epping, NSW 1710, Australia

[22] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[23] Scuola Normale Super Pisa, I-56126 Pisa, Italy

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2011年 / 192卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

cosmological parameters; cosmology: observations; supernovae: general; HUBBLE-SPACE-TELESCOPE; IA LIGHT CURVES; SOUTHERN SPECTROPHOTOMETRIC STANDARDS; DARK ENERGY; INFRARED PHOTOMETRY; HOST GALAXY; COSMOLOGICAL PARAMETERS; OPTICAL PHOTOMETRY; STAR-FORMATION; REDSHIFT;

D O I：

10.1088/0067-0049/192/1/1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 joint sample of 472 SNe (123 low-z, 93 SDSS, 242 SNLS, and 14 Hubble Space Telescope). SN data alone require cosmic acceleration at > 99.999% confidence, including systematic effects. For the dark energy equation of state parameter (assumed constant out to at least z = 1.4) in a flat universe, we find w = -0.91(-0.20+)(0.16) (stat)(-0.14+)(0.07) (sys) from SNe only, consistent with a cosmological constant. Our fits include a correction for the recently discovered relationship between host-galaxy mass and SN absolute brightness. We pay particular attention to systematic uncertainties, characterizing them using a systematic covariance matrix that incorporates the redshift dependence of these effects, as well as the shape-luminosity and color-luminosity relationships. Unlike previous work, we include the effects of systematic terms on the empirical light-curve models. The total systematic uncertainty is dominated by calibration terms. We describe how the systematic uncertainties can be reduced with soon to be available improved nearby and intermediate-redshift samples, particularly those calibrated onto USNO/SDSS-like systems.

引用

页数：29

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