{
  "id": "1711.06076",
  "version": "v1",
  "published": "2017-11-16T13:19:49.000Z",
  "updated": "2017-11-16T13:19:49.000Z",
  "title": "The 2015 superoutburst of QZ Virginis: Detection of growing superhumps between the precursor and main superoutburst",
  "authors": [
    "Akira Imada",
    "Taichi Kato",
    "Keisuke Isogai",
    "Franz-Josef Hambsch",
    "Pavol A. Dubovsky",
    "Igor Kudzej",
    "Roger D. Pickard",
    "Hidehiko Akazawa",
    "Kiyoshi Kasai",
    "Hiroshi Itoh",
    "Lewis M. Cook",
    "Seiichiro Kiyota"
  ],
  "comment": "12 pages, 6 figures, published for PASJ, 69, 72",
  "doi": "10.1093/pasj/psx055",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We report on time-resolved photometry of the 2015 February-March superoutburst of QZ Virginis. The superoutburst consisted of a separated precursor, main superoutburst, and rebrightening. We detected superhumps with a period of 0.061181(42) d between the precursor and main superoutburst. Based on analyses of period changes and amplitudes of superhumps, the observed superhumps were identified as growing superhumps (stage A superhumps). The duration of stage A superhumps was about 5 d, unusually long for SU UMa-type dwarf novae. Using the obtained stage A superhump period, we estimated the mass ratio of QZ Vir to be 0.108(3). This value suggests that QZ Vir is an SU UMa-type dwarf nova evolving toward the period minimum. Based on the present and the previous observations regarding long-lasting stage A superhumps, a time scale of stage A superhumps is likely to be determined by the mass ratio of the system and the temperature of the accretion disk.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-11-16T13:19:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "main superoutburst",
      "qz virginis",
      "growing superhumps",
      "mass ratio",
      "su uma-type dwarf nova evolving"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}