{
  "id": "astro-ph/9904051",
  "version": "v1",
  "published": "1999-04-03T21:44:37.000Z",
  "updated": "1999-04-03T21:44:37.000Z",
  "title": "Cosmological Parameters",
  "authors": [
    "Michael S. Turner"
  ],
  "comment": "27 pages LaTeX with 8 eps figures. To be published in The Proceedings of Particle Physics and the Universe (Cosmo-98), edited by David O. Caldwell (AIP, Woodbury, NY)",
  "doi": "10.1063/1.59381",
  "categories": [
    "astro-ph",
    "hep-ph"
  ],
  "abstract": "The discussion of cosmological parameters used to be a source of embarrassment to cosmologists. Today, measurements of the cosmological parameters are leading the way into the era of precision cosmology. The CMB temperature is measured to four significant figures, T_0=2.7277+/-0.002 K; the Hubble constant is now determined with a reliable error estimate, H_0=(65+/-5) km sec^-1 Mpc^-1; the mass density of baryons is precisely determined by big-bang nucleosynthesis Omega_B = (0.019+/-0.001) h^-2; and the age of the Universe inferred from the ages of the oldest stars is 14+/-1.5 Gyr, which is consistent the expansion age. Further, we have the first full accounting of matter and energy in the Universe, complete with a self consistency check. Expressed as a fraction of the critical density it goes like this: neutrinos, between 0.3% and 15%; stars, between 0.3% and 0.6%; baryons (total), 5+/-0.5%; matter (total),40% +/- 10%; smooth, dark energy, 80% +/- 20%; totaling to the critical density (within the errors).",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-04-03T21:44:37.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "98.80.Es"
    ],
    "keywords": [
      "cosmological parameters",
      "critical density",
      "self consistency check",
      "first full",
      "expansion age"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 27,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 483703,
      "adsabs": "1999AIPC..478..113T"
    }
  }
}