{
  "id": "1306.4091",
  "version": "v3",
  "published": "2013-06-18T07:38:05.000Z",
  "updated": "2014-02-25T02:55:55.000Z",
  "title": "The Dark Side of the Universe after Planck",
  "authors": [
    "Cheng Cheng",
    "Qing-Guo Huang"
  ],
  "comment": "7 pages, 11 figures; refs added; version accepted for publication in Phys.Rev.D",
  "journal": "Phys.Rev.D 89, 043003 (2014)",
  "categories": [
    "astro-ph.CO",
    "gr-qc",
    "hep-ph",
    "hep-th"
  ],
  "abstract": "Recently released Planck data implies a smaller Hubble constant $H_0$ than that from Hubble Space Telescope project (HST) and a larger percentage of the matter components $\\Omega_m$ compared to Supernova Legacy Survey (SNLS) in $\\Lambda$CDM model. In this paper we found that even though the tension on $H_0$ between Planck and HST can be relaxed if the dark radiation is introduced ($\\Delta N_{\\rm eff}=0.536_{-0.224}^{+0.229}$ at $68\\%$ CL from the datasets of Planck+WMAP Polarization (WP)+baryon acoustic oscillation (BAO)+the combination of supernova Union2.1 compilation of 580 SNe (Union2.1)+HST), $\\Omega_m$ from Planck is still not nicely compatible with that from SNLS. The tensions between Planck and other astrophysical datasets can be significantly relaxed in $w$CDM model, and the combination of these datasets prefers a phantom-like dark energy at more than $95\\%$ CL: $w=-1.15\\pm 0.07$ and $w=-1.16\\pm 0.06$ at $68\\%$ CL from Planck+WP+BAO+Union2.1+HST and Planck+WP+BAO+SNLS+HST respectively. From the statistical point of view, there is no evidence for a time-evolving equation of state ($\\Delta \\chi^2=-0.3$ compared to a constant equation of state for the combination of Planck+WP+BAO+SNLS+HST).",
  "revisions": [
    {
      "version": "v3",
      "updated": "2014-02-25T02:55:55.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "95.36.+x",
      "98.80.Es"
    ],
    "keywords": [
      "dark side",
      "cdm model",
      "hubble space telescope project",
      "combination",
      "supernova legacy survey"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "doi": "10.1103/PhysRevD.89.043003",
      "year": 2014,
      "month": "Feb",
      "volume": 89,
      "number": 4,
      "pages": "043003"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1238902,
      "adsabs": "2014PhRvD..89d3003C"
    }
  }
}