{
  "id": "1207.4248",
  "version": "v1",
  "published": "2012-07-18T01:49:52.000Z",
  "updated": "2012-07-18T01:49:52.000Z",
  "title": "On the Formation of Active Regions",
  "authors": [
    "Robert F. Stein",
    "Åke Nordlund"
  ],
  "journal": "Astrophysical Journal Letters, 753, L13, 2012",
  "doi": "10.1088/2041-8205/753/1/L13",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Magneto-convection can produce an active region without an initial coherent flux tube. A simulation was performed where uniform, untwisted, horizontal magnetic field of 1 kG strenght was advected into the bottom of a computational domain 48 Mm wide by 20 Mm deep. The up and down convective motions produce a hierarchy of magnetic loops with a wide range of scales, with smaller loops riding \"piggy back\" in a serpentine fashion on larger loops. When a large loop approaches the surface it produces an small active region with a compact leading spot and more diffuse following spots.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-07-18T01:49:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "active region",
      "initial coherent flux tube",
      "large loop approaches",
      "horizontal magnetic field",
      "compact leading spot"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2012,
      "month": "Jul",
      "volume": 753,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1122924,
      "adsabs": "2012ApJ...753L..13S"
    }
  }
}