{
  "id": "1508.01170",
  "version": "v1",
  "published": "2015-08-05T18:54:29.000Z",
  "updated": "2015-08-05T18:54:29.000Z",
  "title": "Beating non-linearities: improving the Baryon Acoustic Oscillations with the linear point",
  "authors": [
    "Stefano Anselmi",
    "Glenn D. Starkman",
    "Ravi K. Sheth"
  ],
  "comment": "10 pages, 9 figures",
  "categories": [
    "astro-ph.CO"
  ],
  "abstract": "We propose a new way of looking at the Baryon Acoustic Oscillations in the Large Scale Structure clustering correlation function. We identify a scale s_LP that has two fundamental features: its position is insensitive to non-linear gravity, redshift space distortions, and scale-dependent bias at the 0.5% level; it is geometrical, i.e. independent of the power spectrum of the primordial density fluctuation parameters. These two properties together make s_LP, called the \"linear point\", an excellent cosmological standard ruler. The linear point is also appealing because it is easily identified irrespectively of how non-linearities distort the correlation function. Finally, the correlation function amplitude at s_LP is similarly insensitive to non-linear corrections to within a few percent. Hence, exploiting the particular Baryon features in the correlation function, we propose three new estimators for growth measurements. A preliminary analysis of s_LP in current data is encouraging.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-08-05T18:54:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "baryon acoustic oscillations",
      "linear point",
      "beating non-linearities",
      "scale structure clustering correlation function",
      "large scale structure clustering correlation"
    ],
    "publication": {
      "doi": "10.1093/mnras/stv2436"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1386661
    }
  }
}