{
  "id": "1702.03132",
  "version": "v1",
  "published": "2017-02-10T11:19:54.000Z",
  "updated": "2017-02-10T11:19:54.000Z",
  "title": "Analysis of carbon monoxied absorption at z=2.5 to constrain variation of the proton-to-electron mass ratio",
  "authors": [
    "M. Daprà",
    "P. Noterdaeme",
    "M. Vonk",
    "M. T. Murphy",
    "W. Ubachs"
  ],
  "comment": "Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.CO",
    "astro-ph.GA"
  ],
  "abstract": "Absorption by carbon monoxide in the spectrum of quasar SDSS J000015.16+004833.2 is investigated in order to derive a constraint on the temporal variation of the proton-to-electron mass ratio, mu. The spectrum was recorded using VLT/UVES, and it was partially corrected for long-range wavelength scale distortions using the supercalibration technique. Eight vibrational CO singlet-singlet bands belonging to the A-X electronic absorption system, and the perturbing d3-X(5, 0) singlet-triplet band are detected in the damped Lyman-alpha system at z =2.52. The spectra are modelled using a comprehensive fitting technique, resulting in a final value of Dmu/mu=(1.8 +/- 2.2 +/- 0.4)x10e(-5), which is consistent with no variation over a look-back time of 11.2 Gyrs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-02-10T11:19:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "proton-to-electron mass ratio",
      "carbon monoxied absorption",
      "constrain variation",
      "a-x electronic absorption system",
      "long-range wavelength scale distortions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}