{
  "id": "1105.4035",
  "version": "v1",
  "published": "2011-05-20T08:58:36.000Z",
  "updated": "2011-05-20T08:58:36.000Z",
  "title": "Quasi 9 and 30-40 days periodicities in the solar differential rotation",
  "authors": [
    "J. Javaraiah"
  ],
  "comment": "1 table, 5 figures, accepted by Advances in Space Research",
  "doi": "10.1016/j.asr.2011.05.004",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Using the daily Mount Wilson Doppler velocity data during 1986-1994 (solar cycle 22), we studied the short-term variations of the order of a few days to a month time scales in the solar differential rotation coefficients A-bar, B-bar and C-bar. We found that a ~9-day periodicity is statistically highly significant in the variations of C-bar at the maximum of solar cycle 22. A similar periodicity is found in the variations of B-bar during the descending phase of the cycle 22 with significant on > 99.9% confidence level. At this cycle maximum, a 30-40 day periodicity is found to be dominant among the variations in B-bar, and this periodicity is found in A-bar during almost throughout the period 1986-1994.The ~9-day periodicity in the variation of the differential rotation approximately matches with the known quasi 10-day periodicity in the total solar irradiance (TSI) variability. Hence, we speculate that there exists a relationship between the differential rotation and TSI variability. We suggest that the 9-10 day periodicities of the differential rotation and TSI have a relationship with the production and the emergence rates of the large-scale solar magnetic flux.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-05-20T08:58:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "periodicity",
      "days periodicities",
      "mount wilson doppler velocity data",
      "solar differential rotation coefficients a-bar"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Advances in Space Research",
      "year": 2011,
      "month": "Sep",
      "volume": 48,
      "number": 6,
      "pages": 1032
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 900849,
      "adsabs": "2011AdSpR..48.1032J"
    }
  }
}