{
  "id": "1608.06522",
  "version": "v1",
  "published": "2016-08-23T14:28:20.000Z",
  "updated": "2016-08-23T14:28:20.000Z",
  "title": "LO Peg: surface differential rotation, flares, and spot-topographic evolution",
  "authors": [
    "Subhajeet Karmakar",
    "J. C. Pandey",
    "I. S. Savanov",
    "G. Taş",
    "S. B. Pandey",
    "K. Misra",
    "S. Joshi",
    "E. S. Dmitrienko",
    "T. Sakamoto",
    "N. Gehrels",
    "T. Okajima"
  ],
  "comment": "20 pages, 13 figures, 4 tables, Published in Monthly Notices of the Royal Astronomical Society",
  "journal": "Monthly Notices of the Royal Astronomical Society, 2016, Volume 459, Issue 3, p.3112-3129",
  "doi": "10.1093/mnras/stw855",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Using the wealth of ~24 yr multiband data, we present an in-depth study of the star-spot cycles, surface differential rotations (SDR), optical flares, evolution of star-spot distributions, and coronal activities on the surface of young, single, main-sequence, ultrafast rotator (UFR) LO Peg. From the long-term V -band photometry, we derive rotational period of LO Peg to be 0.4231 +/- 0.0001 d. Using the seasonal variations on the rotational period, the SDR pattern is investigated, and shows a solar-like pattern of SDR. A cyclic pattern with period of ~2.7 yr appears to be present in rotational period variation. During the observations, 20 optical flares are detected with a flare frequency of 1 flare per two days and with flare energy of 10^{31-34} erg. The surface coverage of cool spots is found to be in the range of 9-26 per cent. It appears that the high- and low-latitude spots are interchanging their positions. Quasi-simultaneous observations in X-ray, UV, and optical photometric bands show a signature of an excess of X-ray and UV activities in spotted regions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-08-23T14:28:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "surface differential rotation",
      "lo peg",
      "spot-topographic evolution",
      "optical flares",
      "rotational period variation"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}