SNLS3: Constraints on dark energy combining the Supernova Legacy Survey three-year data with other probes
| العنوان: | SNLS3: Constraints on dark energy combining the Supernova Legacy Survey three-year data with other probes |
|---|---|
| المؤلفون: | Reynald Pain, Sebastien Fabbro, C. Lidmam, N. Fourmanoit, Melissa L. Graham, Jeffrey A. Rich, Richard S. Ellis, S. Baumont, K. Perrett, Nao Suzuki, Julien Guy, Mark Sullivan, Nicolas Regnault, Michael J. Hudson, A. Mourao, D. Hardin, C. Balland, D. Fouchez, E. S. Walker, Pierre Astier, James D. Neill, Saul Perlmutter, David D. Balam, C. J. Pritchet, N. Palanque-Delabrouille, T. Kronborg, H. K. Fakhouri, Alex Conley, Santiago González-Gaitán, P. Ripoche, V. Ruhlmann-Kleider, S. Basa, I. M. Hook, Raymond G. Carlberg, Eric Hsiao, D. A. Howell |
| المساهمون: | Department of Astronomy and Astrophysics [Universty of Toronto], University of Toronto, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), SNLS, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | The Astrophysical Journal The Astrophysical Journal, 2011, 737, pp.102. ⟨10.1088/0004-637X/737/2/102⟩ The Astrophysical Journal, American Astronomical Society, 2011, 737, pp.102. ⟨10.1088/0004-637X/737/2/102⟩ |
| بيانات النشر: | Institute of Physics Publishing, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, media_common.quotation_subject, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Light curve, 01 natural sciences, Galaxy, Universe, Luminosity, symbols.namesake, 13. Climate action, Space and Planetary Science, 0103 physical sciences, Dark energy, symbols, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Supernova Legacy Survey, Flatness (cosmology), 010303 astronomy & astrophysics, media_common, Hubble's law, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We present observational constraints on the nature of dark energy using the Supernova Legacy Survey three year sample (SNLS3) of Guy et al. (2010) and Conley et al. (2011). We use the 472 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 H0 from SHOES, in a flat universe we find omega_m=0.269+/-0.015 and w=-1.061+0.069-0.068 -- 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 omega_m=0.271+/-0.015, omega_k=-0.002+/-0.006, and w=-1.069+0.091-0.092. Parameterizing the time evolution of w as w(a)=w_0+w_a(1-a), gives w_0=-0.905+/-0.196, w_a=-0.984+1.094-1.097 in a flat universe. All of our results are consistent with a flat, w=-1 universe. The size of the SNLS3 sample allows various tests to be performed with the SNe segregated according to their light curve and host galaxy properties. We find that the cosmological constraints derived from these different sub-samples are consistent. There is evidence that the coefficient, beta, relating SN Ia luminosity and color, varies with host parameters at >4sigma significance (in addition to the known SN luminosity--host relation); however this has only a small effect on the cosmological results and is currently a sub-dominant systematic. Accepted for publication in ApJ. Data available from https://tspace.library.utoronto.ca/snls |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0004-637X 1538-4357 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fcb00ff8116f83d350b531b0ef5a971 https://doi.org/10.1088/0004-637x/737/2/102 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....7fcb00ff8116f83d350b531b0ef5a971 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0004637X 15384357 |
|---|