Robust Dark Energy Constraints from Supernovae, Galaxy Clustering, and 3 yr Wilkinson Microwave Anisotropy Probe Observations

By Yun Wang, P. Mukherjee. 2006

274 citations recorded by the source corpus.

Type Ia supernova (SN Ia), galaxy clustering, and cosmic microwave background (CMB) anisotropy data provide complementary constraints on the nature of the dark energy in the universe. We find that the 3 yr Wilkinson Microwave Anisotropy Probe (WMAP) observations give a CMB shift parameter of R ≡ 1/2 dz′/H(z′) = 1.70 ± 0.03. Using this new measured value of the CMB shift parameter, together with the baryon acoustic oscillation (BAO) measurement from the Sloan Digital Sky Survey (SDSS), and SN Ia data from the HST/GOODS program and the first-year Supernova Legacy Survey, we derive model-independent constraints on the dark energy density ρX(z) and the cosmic expansion rate H(z). We also derive constraints on the dark energy equation of state wX(z) = w0 + w′z (with cutoff at z = 2) and wX(a) = w0 + (1 - a)wa. We find that current data provide slightly tighter constraints on ρX(z) and H(z) as free functions in redshift and roughly a factor of 2 improvement in constraining wX(z). A cosmological constant remains consistent with the data; however, uncertainties remain large for model-independent constraints of dark energy. A significant increase in the number of observed SNe Ia between redshifts of 1 and 2, complemented by improved BAO and weak-lensing cosmography measurements (as expected from the JEDI mission concept for the Joint Dark Energy Mission), will be required to dramatically tighten model-independent dark energy constraints.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bbc2c85745cbe8e12d3da05faa36b47e3850e7d5

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In Astronomy and Astrophysics

1. A. Riess
2. D. Schneider
3. A. Filippenko
4. Daniel J. Eisenstein
5. P. Hopkins
6. L. Hernquist
7. S. Jha
8. R. Kirshner

In Nuclear and High Energy Physics

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2. Weidong Li
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6. Xin Zhang
7. J. C. Wheeler
8. J. Tonry

Citations in the corpus

• Constraints on holographic dark energy from the latest supernovae, galaxy clustering, and cosmic microwave background anisotropy observations (2007, methodology): “[68], the CMB shift parameter derived from three-year WMAP observations [69], and the baryon acoustic oscillations detected in the large-scale correlation function of Sloan Digital Sky Survey (SDSS) luminous red galaxies [70].”
• FIRST-YEAR SLOAN DIGITAL SKY SURVEY-II (SDSS-II) SUPERNOVA RESULTS: CONSTRAINTS ON NONSTANDARD COSMOLOGICAL MODELS (2009, background): “One describes the scaled distance to recombination, R, and the other the angular scale of the sound horizon at recombination, ℓA (e.g., Komatsu et al. 2009; Elgarøy & Multamäki 2007; Wang & Mukherjee 2006).”
• Cosmological parameter constraints from SDSS luminous red galaxies: a new treatment of large-scale clustering (2009, background): “…et al. 2003; Riess et al. 2004; Tegmark et al. 2004; Seljak et al. 2005; Astier et al. 2006; Sánchez et al. 2006; Seljak Slosar & McDonald 2006; Wang & Mukherjee 2006; Spergel et al. 2007; Wood-Vasey et al. 2007; Okumura et al. 2008; Xia et al. 2008; Ferramacho, Blanchard & Zolnierowski 2009;…”
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z ≥ 1: Narrowing Constraints on the Early Behavior of Dark Energy (2006, methodology): “This result is very similar to that of Wang & Mukherjee 2006.”