{
  "id": "1206.4545",
  "version": "v1",
  "published": "2012-06-20T16:08:35.000Z",
  "updated": "2012-06-20T16:08:35.000Z",
  "title": "Dead calm areas in the very quiet Sun",
  "authors": [
    "M. J. Martínez González",
    "R. Manso Sainz",
    "A. Asensio Ramos",
    "E. Hijano"
  ],
  "comment": "accepted in ApJ",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We analyze two regions of the quiet Sun (35.6 x 35.6 Mm^2) observed at high spatial resolution (~100 km) in polarized light by the IMaX spectropolarimeter onboard the Sunrise balloon. We identify 497 small-scale (~400 km) magnetic loops, appearing at an effective rate of 0.25 loop h^{-1} arcsec^{-2}; further, we argue that this number and rate are underestimated by ~30%. However, we find that these small dipoles do not appear uniformly on the solar surface: their spatial distribution is rather filamentary and clumpy, creating dead calm areas, characterized by a very low magnetic signal and a lack of organized loop-like structures at the detection level of our instruments, that cannot be explained as just statistical fluctuations of a Poisson spatial process. We argue that this is an intrinsic characteristic of the mechanism that generates the magnetic fields in the very quiet Sun. The spatio-temporal coherences and the clumpy structure of the phenomenon suggest a recurrent, intermittent mechanism for the generation of magnetic fields in the quietest areas of the Sun.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-06-20T16:08:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quiet sun",
      "magnetic fields",
      "imax spectropolarimeter onboard",
      "poisson spatial process",
      "low magnetic signal"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/755/2/175",
      "journal": "The Astrophysical Journal",
      "year": 2012,
      "month": "Aug",
      "volume": 755,
      "number": 2,
      "pages": 175
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1118816,
      "adsabs": "2012ApJ...755..175M"
    }
  }
}