{
  "id": "1403.7173",
  "version": "v2",
  "published": "2014-03-27T19:01:02.000Z",
  "updated": "2014-10-18T05:44:41.000Z",
  "title": "Constraints on the cosmological parameters from BICEP2, Planck and WMAP",
  "authors": [
    "Cheng Cheng",
    "Qing-Guo Huang"
  ],
  "comment": "4 pages, 3 figures and 1 table; major revision, dust added for solving the tension between Planck13 and BICEP2, version accepted for publication in EPJC",
  "categories": [
    "astro-ph.CO",
    "gr-qc",
    "hep-ph",
    "hep-th"
  ],
  "abstract": "In this paper we constrain the cosmological parameters, in particular the tilt of tensor power spectrum, by adopting Background Imaging of Cosmic Extragalactic Polarization (B2), Planck released in 2013 (P13) and Wilkinson Microwaves Anisotropy Probe 9-year Polarization (WP) data. We find that a blue tilted tensor power spectrum is preferred at more than $3\\sigma$ confidence level if the data from B2 are assumed to be totally interpreted as the relic gravitational waves, but a scale invariant tensor power spectrum is consistent with the data once the polarized dust is taken into account. The recent Planck 353 GHz HFI dust polarization data imply that the B2 data are perfectly consistent with there being no gravitational wave signal.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-03-27T19:01:02.000Z",
      "abstract": "In this paper we constrain the cosmological parameters in the base $\\Lambda$CDM+nrun+r+$n_t$ model by adopting Background Imaging of Cosmic Extragalactic Polarization (B2), Planck released in 2013 (P13) and Wilkinson Microwaves Anisotropy Probe 9-year Polarization (WP) data, where nrun denotes the running of spectruml index and $n_t$ is the tilt of primordial gravitational waves spectrum. We find that the constraints on $r$ and $n_t$ are $r=0.23_{-0.09}^{+0.05}$ and $n_t=0.03_{-0.11}^{+0.13}$ which are compatible with our previous results in arXiv:1403.5463 where only B2 data was used.",
      "comment": "4 pages, 3 figures and 1 table",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2014-10-18T05:44:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cosmological parameters",
      "constraints",
      "primordial gravitational waves spectrum",
      "wilkinson microwaves anisotropy probe",
      "cosmic extragalactic polarization"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1140/epjc/s10052-014-3139-1",
      "journal": "European Physical Journal C",
      "year": 2014,
      "month": "Nov",
      "volume": 74,
      "pages": 3139
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1287612,
      "adsabs": "2014EPJC...74.3139C"
    }
  }
}