SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES
Identifieur interne : 004568 ( PascalFrancis/Curation ); précédent : 004567; suivant : 004569SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES
Auteurs : M. Sullivan [Royaume-Uni] ; J. Guy [France] ; A. Conley [Canada, États-Unis] ; N. Regnault [France] ; P. Astier [France] ; C. Balland [France] ; S. Basa [France] ; R. G. Carlberg [Canada] ; D. Fouchez [France] ; D. Hardin [France] ; I. M. Hook [Royaume-Uni, Italie] ; D. A. Howell [États-Unis] ; R. Pain [France] ; N. Palanque-Delabroullle [France] ; K. M. Perrett [Canada] ; C. J. Pritchet [Canada] ; J. Rich [France] ; V. Ruhlmann-Kleider [France] ; D. Balam [Canada] ; S. Baumont [France] ; R. S. Ellis [Royaume-Uni, États-Unis] ; S. Fabbro [Canada] ; H. K. Fakhouri [États-Unis] ; N. Fourmanoit [France] ; S. Gonzalez-Gaitan [Canada] ; M. L. Graham [États-Unis] ; M. J. Hudson [Canada] ; E. Hsiao [États-Unis] ; T. Kronborg [France] ; C. Lidman [Australie] ; A. M. Mourao [Portugal] ; J. D. Neill [États-Unis] ; S. Perlmutter [États-Unis] ; P. Ripoche [France, États-Unis] ; N. Suzuki [États-Unis] ; E. S. Walker [Royaume-Uni, Italie]Source :
- The Astrophysical journal [ 0004-637X ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cosmologie.
English descriptors
- KwdEn :
Abstract
We present observational constraints on the nature of dark energy using the Supernova Legacy Survey three-year sample (SNLS3) of Guy et al. and Conley et al. We use the 472 Type Ia supernovae (SNe Ia) in this sample, accounting for recently discovered correlations between SN Ia luminosity and host galaxy properties, and include the effects of all identified systematic uncertainties directly in the cosmological fits. Combining the SNLS3 data with the full WMAP7 power spectrum, the Sloan Digital Sky Survey luminous red galaxy power spectrum, and a prior on the Hubble constant Ho from SHOES, in a flat universe we find Ωm = 0.269±0.015 and w = -1.061+0.069-0.068 (where the uncertainties include all statistical and SN Ia systematic errors)-a 6.5% measure of the dark energy equation-of-state parameter w. The statistical and systematic uncertainties are approximately equal, with the systematic uncertainties dominated by the photometric calibration of the SN Ia fluxes-without these calibration effects, systematics contribute only a ˜2% error in w. When relaxing the assumption of flatness, we find Ωm = 0.271 ± 0.015, Ωk = -0.002 ± 0.006, and w = -1.069+0.091-0.092.Parameterizing the time evolution of w as w(a) = w0+wa(1-a) gives w0 = -0.905±0.196. wa = -0.984+1.094-1.097 in a flat universe. All of our results are consistent with a flat, w = -1 universe.
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</affiliation>
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<affiliation wicri:level="1"><inist:fA14 i1="22"><s1>Department of Physics, University of California, Berkeley, 366 LeConte Hall MC 7300</s1>
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<author><name sortKey="Walker, E S" sort="Walker, E S" uniqKey="Walker E" first="E. S." last="Walker">E. S. Walker</name>
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<affiliation wicri:level="1"><inist:fA14 i1="23"><s1>Scuola Normale Superiore, Piazza dei Cavalieri 7</s1>
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</titleStmt>
<publicationStmt><idno type="wicri:source">INIST</idno>
<idno type="inist">11-0397555</idno>
<date when="2011">2011</date>
<idno type="stanalyst">PASCAL 11-0397555 INIST</idno>
<idno type="RBID">Pascal:11-0397555</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">001976</idno>
<idno type="wicri:Area/PascalFrancis/Curation">004568</idno>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES</title>
<author><name sortKey="Sullivan, M" sort="Sullivan, M" uniqKey="Sullivan M" first="M." last="Sullivan">M. Sullivan</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics (Astrophysics), University of Oxford, Keble Road</s1>
<s2>Oxford OX 1 3RH</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
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</affiliation>
</author>
<author><name sortKey="Guy, J" sort="Guy, J" uniqKey="Guy J" first="J." last="Guy">J. Guy</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>LPNHE, Université Pierre et Marie Curie Paris 6, Université Paris Diderot Paris 7, CNRS-IN2P3, 4 Place Jussieu</s1>
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<author><name sortKey="Conley, A" sort="Conley, A" uniqKey="Conley A" first="A." last="Conley">A. Conley</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street</s1>
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</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Center for Astrophysics and Space Astronomy, University of Colorado, 593 UCB</s1>
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<author><name sortKey="Regnault, N" sort="Regnault, N" uniqKey="Regnault N" first="N." last="Regnault">N. Regnault</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>LPNHE, Université Pierre et Marie Curie Paris 6, Université Paris Diderot Paris 7, CNRS-IN2P3, 4 Place Jussieu</s1>
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<author><name sortKey="Astier, P" sort="Astier, P" uniqKey="Astier P" first="P." last="Astier">P. Astier</name>
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<author><name sortKey="Balland, C" sort="Balland, C" uniqKey="Balland C" first="C." last="Balland">C. Balland</name>
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</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Université Paris 11</s1>
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<sZ>6 aut.</sZ>
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<country>France</country>
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<author><name sortKey="Basa, S" sort="Basa, S" uniqKey="Basa S" first="S." last="Basa">S. Basa</name>
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<author><name sortKey="Carlberg, R G" sort="Carlberg, R G" uniqKey="Carlberg R" first="R. G." last="Carlberg">R. G. Carlberg</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street</s1>
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<author><name sortKey="Fouchez, D" sort="Fouchez, D" uniqKey="Fouchez D" first="D." last="Fouchez">D. Fouchez</name>
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<author><name sortKey="Hook, I M" sort="Hook, I M" uniqKey="Hook I" first="I. M." last="Hook">I. M. Hook</name>
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<sZ>1 aut.</sZ>
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<author><name sortKey="Howell, D A" sort="Howell, D A" uniqKey="Howell D" first="D. A." last="Howell">D. A. Howell</name>
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<affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Physics, University of California, Santa Barbara, Broida Hall, Mail Code 9530</s1>
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<sZ>12 aut.</sZ>
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<author><name sortKey="Pain, R" sort="Pain, R" uniqKey="Pain R" first="R." last="Pain">R. Pain</name>
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<author><name sortKey="Palanque Delabroullle, N" sort="Palanque Delabroullle, N" uniqKey="Palanque Delabroullle N" first="N." last="Palanque-Delabroullle">N. Palanque-Delabroullle</name>
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<author><name sortKey="Perrett, K M" sort="Perrett, K M" uniqKey="Perrett K" first="K. M." last="Perrett">K. M. Perrett</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street</s1>
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<s3>CAN</s3>
<sZ>3 aut.</sZ>
<sZ>8 aut.</sZ>
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<sZ>15 aut.</sZ>
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<author><name sortKey="Pritchet, C J" sort="Pritchet, C J" uniqKey="Pritchet C" first="C. J." last="Pritchet">C. J. Pritchet</name>
<affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Department of Physics and Astronomy, University of Victoria, P.O. Box 3055 STN CSC</s1>
<s2>Victoria, BC V8T 1M8</s2>
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<sZ>16 aut.</sZ>
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<author><name sortKey="Rich, J" sort="Rich, J" uniqKey="Rich J" first="J." last="Rich">J. Rich</name>
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<sZ>14 aut.</sZ>
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<author><name sortKey="Ruhlmann Kleider, V" sort="Ruhlmann Kleider, V" uniqKey="Ruhlmann Kleider V" first="V." last="Ruhlmann-Kleider">V. Ruhlmann-Kleider</name>
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<sZ>14 aut.</sZ>
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<author><name sortKey="Balam, D" sort="Balam, D" uniqKey="Balam D" first="D." last="Balam">D. Balam</name>
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<sZ>16 aut.</sZ>
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<author><name sortKey="Baumont, S" sort="Baumont, S" uniqKey="Baumont S" first="S." last="Baumont">S. Baumont</name>
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</affiliation>
</author>
<author><name sortKey="Ellis, R S" sort="Ellis, R S" uniqKey="Ellis R" first="R. S." last="Ellis">R. S. Ellis</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics (Astrophysics), University of Oxford, Keble Road</s1>
<s2>Oxford OX 1 3RH</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>21 aut.</sZ>
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<affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Department of Astrophysics, California Institute of Technology, MS 105-24</s1>
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<s3>USA</s3>
<sZ>21 aut.</sZ>
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<author><name sortKey="Fabbro, S" sort="Fabbro, S" uniqKey="Fabbro S" first="S." last="Fabbro">S. Fabbro</name>
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<s2>Victoria, BC V8T 1M8</s2>
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<sZ>16 aut.</sZ>
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<author><name sortKey="Fakhouri, H K" sort="Fakhouri, H K" uniqKey="Fakhouri H" first="H. K." last="Fakhouri">H. K. Fakhouri</name>
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<sZ>23 aut.</sZ>
<sZ>28 aut.</sZ>
<sZ>33 aut.</sZ>
<sZ>34 aut.</sZ>
<sZ>35 aut.</sZ>
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<author><name sortKey="Fourmanoit, N" sort="Fourmanoit, N" uniqKey="Fourmanoit N" first="N." last="Fourmanoit">N. Fourmanoit</name>
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<s3>CAN</s3>
<sZ>27 aut.</sZ>
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<sZ>27 aut.</sZ>
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<s2>Epping, NSW 1710</s2>
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<sZ>30 aut.</sZ>
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<s3>PRT</s3>
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<author><name sortKey="Neill, J D" sort="Neill, J D" uniqKey="Neill J" first="J. D." last="Neill">J. D. Neill</name>
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<affiliation wicri:level="1"><inist:fA14 i1="22"><s1>Department of Physics, University of California, Berkeley, 366 LeConte Hall MC 7300</s1>
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<sZ>33 aut.</sZ>
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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>LPNHE, Université Pierre et Marie Curie Paris 6, Université Paris Diderot Paris 7, CNRS-IN2P3, 4 Place Jussieu</s1>
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<author><name sortKey="Walker, E S" sort="Walker, E S" uniqKey="Walker E" first="E. S." last="Walker">E. S. Walker</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics (Astrophysics), University of Oxford, Keble Road</s1>
<s2>Oxford OX 1 3RH</s2>
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<country>Royaume-Uni</country>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="23"><s1>Scuola Normale Superiore, Piazza dei Cavalieri 7</s1>
<s2>56126 Pisa</s2>
<s3>ITA</s3>
<sZ>36 aut.</sZ>
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<country>Italie</country>
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</analytic>
<series><title level="j" type="main">The Astrophysical journal</title>
<title level="j" type="abbreviated">Astrophys. j.</title>
<idno type="ISSN">0004-637X</idno>
<imprint><date when="2011">2011</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">The Astrophysical journal</title>
<title level="j" type="abbreviated">Astrophys. j.</title>
<idno type="ISSN">0004-637X</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Color</term>
<term>Correlations</term>
<term>Cosmological parameter</term>
<term>Cosmology</term>
<term>Dark energy</term>
<term>Energy equation</term>
<term>Equations of state</term>
<term>Flat metric</term>
<term>Galaxies</term>
<term>Hubble constant</term>
<term>Light curves</term>
<term>Luminosity</term>
<term>Power spectra</term>
<term>Sky surveys</term>
<term>Type I supernova</term>
<term>Uncertainty</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Energie sombre</term>
<term>Supernova type I</term>
<term>Corrélation</term>
<term>Luminosité</term>
<term>Galaxies</term>
<term>Incertitude</term>
<term>Spectre puissance</term>
<term>Etude ciel</term>
<term>Constante Hubble</term>
<term>Métrique plate</term>
<term>Equation énergie</term>
<term>Equation état</term>
<term>Courbe lumière</term>
<term>Couleur</term>
<term>Paramètre cosmologique</term>
<term>Cosmologie</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cosmologie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">We present observational constraints on the nature of dark energy using the Supernova Legacy Survey three-year sample (SNLS3) of Guy et al. and Conley et al. We use the 472 Type Ia supernovae (SNe Ia) in this sample, accounting for recently discovered correlations between SN Ia luminosity and host galaxy properties, and include the effects of all identified systematic uncertainties directly in the cosmological fits. Combining the SNLS3 data with the full WMAP7 power spectrum, the Sloan Digital Sky Survey luminous red galaxy power spectrum, and a prior on the Hubble constant H<sub>o</sub>
from SHOES, in a flat universe we find Ω<sub>m</sub>
= 0.269±0.015 and w = -1.061<sup>+0.069</sup>
<sub>-0.068</sub>
(where the uncertainties include all statistical and SN Ia systematic errors)-a 6.5% measure of the dark energy equation-of-state parameter w. The statistical and systematic uncertainties are approximately equal, with the systematic uncertainties dominated by the photometric calibration of the SN Ia fluxes-without these calibration effects, systematics contribute only a ˜2% error in w. When relaxing the assumption of flatness, we find Ω<sub>m</sub>
= 0.271 ± 0.015, Ω<sub>k</sub>
= -0.002 ± 0.006, and w = -1.069<sup>+0.091</sup>
<sub>-0.092</sub>
.Parameterizing the time evolution of w as w(a) = w<sub>0</sub>
+w<sub>a</sub>
(1-a) gives w<sub>0</sub>
= -0.905±0.196. w<sub>a</sub>
= -0.984<sup>+1.094</sup>
<sub>-1.097</sub>
in a flat universe. All of our results are consistent with a flat, w = -1 universe.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0004-637X</s0>
</fA01>
<fA02 i1="01"><s0>ASJOAB</s0>
</fA02>
<fA03 i2="1"><s0>Astrophys. j.</s0>
</fA03>
<fA05><s2>737</s2>
</fA05>
<fA06><s2>2</s2>
<s3>p. 1</s3>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>SULLIVAN (M.)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>GUY (J.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>CONLEY (A.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>REGNAULT (N.)</s1>
</fA11>
<fA11 i1="05" i2="1"><s1>ASTIER (P.)</s1>
</fA11>
<fA11 i1="06" i2="1"><s1>BALLAND (C.)</s1>
</fA11>
<fA11 i1="07" i2="1"><s1>BASA (S.)</s1>
</fA11>
<fA11 i1="08" i2="1"><s1>CARLBERG (R. G.)</s1>
</fA11>
<fA11 i1="09" i2="1"><s1>FOUCHEZ (D.)</s1>
</fA11>
<fA11 i1="10" i2="1"><s1>HARDIN (D.)</s1>
</fA11>
<fA11 i1="11" i2="1"><s1>HOOK (I. M.)</s1>
</fA11>
<fA11 i1="12" i2="1"><s1>HOWELL (D. A.)</s1>
</fA11>
<fA11 i1="13" i2="1"><s1>PAIN (R.)</s1>
</fA11>
<fA11 i1="14" i2="1"><s1>PALANQUE-DELABROULLLE (N.)</s1>
</fA11>
<fA11 i1="15" i2="1"><s1>PERRETT (K. M.)</s1>
</fA11>
<fA11 i1="16" i2="1"><s1>PRITCHET (C. J.)</s1>
</fA11>
<fA11 i1="17" i2="1"><s1>RICH (J.)</s1>
</fA11>
<fA11 i1="18" i2="1"><s1>RUHLMANN-KLEIDER (V.)</s1>
</fA11>
<fA11 i1="19" i2="1"><s1>BALAM (D.)</s1>
</fA11>
<fA11 i1="20" i2="1"><s1>BAUMONT (S.)</s1>
</fA11>
<fA11 i1="21" i2="1"><s1>ELLIS (R. S.)</s1>
</fA11>
<fA11 i1="22" i2="1"><s1>FABBRO (S.)</s1>
</fA11>
<fA11 i1="23" i2="1"><s1>FAKHOURI (H. K.)</s1>
</fA11>
<fA11 i1="24" i2="1"><s1>FOURMANOIT (N.)</s1>
</fA11>
<fA11 i1="25" i2="1"><s1>GONZALEZ-GAITAN (S.)</s1>
</fA11>
<fA11 i1="26" i2="1"><s1>GRAHAM (M. L.)</s1>
</fA11>
<fA11 i1="27" i2="1"><s1>HUDSON (M. J.)</s1>
</fA11>
<fA11 i1="28" i2="1"><s1>HSIAO (E.)</s1>
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<fA11 i1="29" i2="1"><s1>KRONBORG (T.)</s1>
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<fA11 i1="30" i2="1"><s1>LIDMAN (C.)</s1>
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<fA11 i1="31" i2="1"><s1>MOURAO (A. M.)</s1>
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<fA11 i1="32" i2="1"><s1>NEILL (J. D.)</s1>
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<fA11 i1="33" i2="1"><s1>PERLMUTTER (S.)</s1>
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<fA11 i1="34" i2="1"><s1>RIPOCHE (P.)</s1>
</fA11>
<fA11 i1="35" i2="1"><s1>SUZUKI (N.)</s1>
</fA11>
<fA11 i1="36" i2="1"><s1>WALKER (E. S.)</s1>
</fA11>
<fA14 i1="01"><s1>Department of Physics (Astrophysics), University of Oxford, Keble Road</s1>
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<sZ>1 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>21 aut.</sZ>
<sZ>36 aut.</sZ>
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<fA14 i1="02"><s1>LPNHE, Université Pierre et Marie Curie Paris 6, Université Paris Diderot Paris 7, CNRS-IN2P3, 4 Place Jussieu</s1>
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<sZ>2 aut.</sZ>
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<fA14 i1="03"><s1>Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street</s1>
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<sZ>3 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>15 aut.</sZ>
<sZ>25 aut.</sZ>
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<fA14 i1="04"><s1>Center for Astrophysics and Space Astronomy, University of Colorado, 593 UCB</s1>
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<s3>USA</s3>
<sZ>3 aut.</sZ>
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<fA14 i1="05"><s1>Université Paris 11</s1>
<s2>Orsay 91405</s2>
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<sZ>6 aut.</sZ>
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<fA14 i1="06"><s1>LAM, CNRS, BP8, Pôle de l'Étoile Site de Château-Gombert, 38 rue Frederic Joliot-Curie</s1>
<s2>13388 Marseille</s2>
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<fA14 i1="07"><s1>CPPM, Aix-Marseille Université, CNRS/IN2P3</s1>
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<sZ>9 aut.</sZ>
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<fA14 i1="08"><s1>INAF-Osservatorio Astronomico di Roma, via Frascati 33</s1>
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<s3>ITA</s3>
<sZ>11 aut.</sZ>
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<fA14 i1="09"><s1>Las Cumbres Observatory Global Telescope Network, 6740 Cortona Dr., Suite 102</s1>
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<sZ>12 aut.</sZ>
<sZ>26 aut.</sZ>
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<fA14 i1="10"><s1>Department of Physics, University of California, Santa Barbara, Broida Hall, Mail Code 9530</s1>
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<s3>USA</s3>
<sZ>12 aut.</sZ>
<sZ>26 aut.</sZ>
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<fA14 i1="11"><s1>CEA, Centre de Saclay, Irfu/SPP</s1>
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<sZ>14 aut.</sZ>
<sZ>17 aut.</sZ>
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<fA14 i1="12"><s1>Network Information Operations, DRDC Ottawa, 3701 Carling Avenue</s1>
<s2>Ottawa, ON K1A 0Z4</s2>
<s3>CAN</s3>
<sZ>15 aut.</sZ>
</fA14>
<fA14 i1="13"><s1>Department of Physics and Astronomy, University of Victoria, P.O. Box 3055 STN CSC</s1>
<s2>Victoria, BC V8T 1M8</s2>
<s3>CAN</s3>
<sZ>16 aut.</sZ>
<sZ>19 aut.</sZ>
<sZ>22 aut.</sZ>
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<fA14 i1="14"><s1>LPSC, UJF, CNRS/IN2P3. INPG, 53 rue des Martyrs</s1>
<s2>38026 Grenoble</s2>
<s3>FRA</s3>
<sZ>20 aut.</sZ>
</fA14>
<fA14 i1="15"><s1>Department of Astrophysics, California Institute of Technology, MS 105-24</s1>
<s2>Pasadena, CA 91125</s2>
<s3>USA</s3>
<sZ>21 aut.</sZ>
</fA14>
<fA14 i1="16"><s1>LBNL, 1 Cyclotron Road</s1>
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<sZ>23 aut.</sZ>
<sZ>28 aut.</sZ>
<sZ>33 aut.</sZ>
<sZ>34 aut.</sZ>
<sZ>35 aut.</sZ>
</fA14>
<fA14 i1="17"><s1>Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West</s1>
<s2>Waterloo, ON N2L 3G1</s2>
<s3>CAN</s3>
<sZ>27 aut.</sZ>
</fA14>
<fA14 i1="18"><s1>Perimeter Institute for Theoretical Physics, 31 Caroline St. N.</s1>
<s2>Waterloo, ON N2L 2Y5</s2>
<s3>CAN</s3>
<sZ>27 aut.</sZ>
</fA14>
<fA14 i1="19"><s1>Australian Astronomical Observatory, P.O. Box 296</s1>
<s2>Epping, NSW 1710</s2>
<s3>AUS</s3>
<sZ>30 aut.</sZ>
</fA14>
<fA14 i1="20"><s1>CENTRA-Centro Multidisciplinar de Astrofísica and Dep. Física, IST, Av. Rovisco Pais</s1>
<s2>1049-001 Lisboa</s2>
<s3>PRT</s3>
<sZ>31 aut.</sZ>
</fA14>
<fA14 i1="21"><s1>California Institute of Technology, 1200 East California Boulevard</s1>
<s2>Pasadena, CA 91125</s2>
<s3>USA</s3>
<sZ>32 aut.</sZ>
</fA14>
<fA14 i1="22"><s1>Department of Physics, University of California, Berkeley, 366 LeConte Hall MC 7300</s1>
<s2>Berkeley, CA 94720-7300</s2>
<s3>USA</s3>
<sZ>33 aut.</sZ>
</fA14>
<fA14 i1="23"><s1>Scuola Normale Superiore, Piazza dei Cavalieri 7</s1>
<s2>56126 Pisa</s2>
<s3>ITA</s3>
<sZ>36 aut.</sZ>
</fA14>
<fA20><s2>737102.1-737102.19</s2>
</fA20>
<fA21><s1>2011</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>512</s2>
<s5>354000500132270560</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2011 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>3/4 p.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>11-0397555</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>The Astrophysical journal</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>We present observational constraints on the nature of dark energy using the Supernova Legacy Survey three-year sample (SNLS3) of Guy et al. and Conley et al. We use the 472 Type Ia supernovae (SNe Ia) in this sample, accounting for recently discovered correlations between SN Ia luminosity and host galaxy properties, and include the effects of all identified systematic uncertainties directly in the cosmological fits. Combining the SNLS3 data with the full WMAP7 power spectrum, the Sloan Digital Sky Survey luminous red galaxy power spectrum, and a prior on the Hubble constant H<sub>o</sub>
from SHOES, in a flat universe we find Ω<sub>m</sub>
= 0.269±0.015 and w = -1.061<sup>+0.069</sup>
<sub>-0.068</sub>
(where the uncertainties include all statistical and SN Ia systematic errors)-a 6.5% measure of the dark energy equation-of-state parameter w. The statistical and systematic uncertainties are approximately equal, with the systematic uncertainties dominated by the photometric calibration of the SN Ia fluxes-without these calibration effects, systematics contribute only a ˜2% error in w. When relaxing the assumption of flatness, we find Ω<sub>m</sub>
= 0.271 ± 0.015, Ω<sub>k</sub>
= -0.002 ± 0.006, and w = -1.069<sup>+0.091</sup>
<sub>-0.092</sub>
.Parameterizing the time evolution of w as w(a) = w<sub>0</sub>
+w<sub>a</sub>
(1-a) gives w<sub>0</sub>
= -0.905±0.196. w<sub>a</sub>
= -0.984<sup>+1.094</sup>
<sub>-1.097</sub>
in a flat universe. All of our results are consistent with a flat, w = -1 universe.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001E03</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Energie sombre</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Dark energy</s0>
<s5>26</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Supernova type I</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Type I supernova</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Supernova tipo I</s0>
<s5>27</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Corrélation</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Correlations</s0>
<s5>28</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Luminosité</s0>
<s5>29</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Luminosity</s0>
<s5>29</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Galaxies</s0>
<s5>30</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Galaxies</s0>
<s5>30</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Incertitude</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Uncertainty</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Incertidumbre</s0>
<s5>31</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Spectre puissance</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Power spectra</s0>
<s5>32</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Etude ciel</s0>
<s5>33</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Sky surveys</s0>
<s5>33</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Constante Hubble</s0>
<s5>34</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Hubble constant</s0>
<s5>34</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Métrique plate</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Flat metric</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Métrico plano</s0>
<s5>35</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Equation énergie</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Energy equation</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Ecuación energía</s0>
<s5>36</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Equation état</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Equations of state</s0>
<s5>37</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Courbe lumière</s0>
<s5>38</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Light curves</s0>
<s5>38</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Couleur</s0>
<s5>39</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Color</s0>
<s5>39</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Paramètre cosmologique</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Cosmological parameter</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Parámetro cosmológico</s0>
<s5>40</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Cosmologie</s0>
<s5>41</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Cosmology</s0>
<s5>41</s5>
</fC03>
<fN21><s1>269</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>
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