{
  "id": "1106.4562",
  "version": "v1",
  "published": "2011-06-22T20:20:27.000Z",
  "updated": "2011-06-22T20:20:27.000Z",
  "title": "Baryon Acoustic Oscillations in 2D II: Redshift-space halo clustering in N-body simulations",
  "authors": [
    "Takahiro Nishimichi",
    "Atsushi Taruya"
  ],
  "comment": "15 pages, 6 figures",
  "journal": "Physical Review D vol. 84 (2011) Issue 4 id. 043526",
  "doi": "10.1103/PhysRevD.84.043526",
  "categories": [
    "astro-ph.CO"
  ],
  "abstract": "We measure the halo power spectrum in redshift space from cosmological N-body simulations, and test the analytical models of redshift distortions particularly focusing on the scales of baryon acoustic oscillations (BAOs). Remarkably, the measured halo power spectrum in redshift space exhibits a large-scale enhancement in amplitude relative to the real-space clustering, and the effect becomes significant for the massive or highly biased halo samples. These findings cannot be simply explained by the so-called streaming model frequently used in the literature. By contrast, a physically-motivated perturbation theory model developed in the previous paper reproduces the halo power spectrum very well, and the model combining a simple linear scale-dependent bias can accurately characterize the clustering anisotropies of halos in two dimensions, i.e., line-of-sight and its perpendicular directions. The results highlight the significance of non-linear coupling between density and velocity fields associated with two competing effects of redshift distortions, i.e., Kaiser and Finger-of-God effects, and a proper account of this effect would be important in accurately characterizing the BAOs in two dimensions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-06-22T20:20:27.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "98.80.-k"
    ],
    "keywords": [
      "baryon acoustic oscillations",
      "n-body simulations",
      "redshift-space halo clustering",
      "halo power spectrum",
      "perturbation theory model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2011,
      "month": "Aug",
      "volume": 84,
      "number": 4,
      "pages": "043526"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 915017,
      "adsabs": "2011PhRvD..84d3526N"
    }
  }
}