{
  "id": "1012.4933",
  "version": "v1",
  "published": "2010-12-22T10:46:51.000Z",
  "updated": "2010-12-22T10:46:51.000Z",
  "title": "Are short-term variations in solar oscillation frequencies the signature of a second solar dynamo?",
  "authors": [
    "Anne-Marie Broomhall",
    "Stephen T. Fletcher",
    "David Salabert",
    "Sarbani Basu",
    "William J. Chaplin",
    "Yvonne Elsworth",
    "Rafael A. Garcia",
    "Antonio Jimenez",
    "Roger New"
  ],
  "comment": "6 pages, 2 figures, proceedings for SOHO-24/GONG 2010 conference, to be published in JPCS",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "In addition to the well-known 11-year solar cycle, the Sun's magnetic activity also shows significant variation on shorter time scales, e.g. between one and two years. We observe a quasi-biennial (2-year) signal in the solar p-mode oscillation frequencies, which are sensitive probes of the solar interior. The signal is visible in Sun-as-a-star data observed by different instruments and here we describe the results obtained using BiSON, GOLF, and VIRGO data. Our results imply that the 2-year signal is susceptible to the influence of the main 11-year solar cycle. However, the source of the signal appears to be separate from that of the 11-year cycle. We speculate as to whether it might be the signature of a second dynamo, located in the region of near-surface rotational shear.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-12-22T10:46:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "solar oscillation frequencies",
      "second solar dynamo",
      "short-term variations",
      "solar cycle",
      "solar p-mode oscillation frequencies"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1742-6596/271/1/012025",
      "journal": "Journal of Physics Conference Series",
      "year": 2011,
      "month": "Jan",
      "volume": 271,
      "number": 1,
      "pages": "012025"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 882171,
      "adsabs": "2011JPhCS.271a2025B"
    }
  }
}