{
  "id": "1505.06048",
  "version": "v1",
  "published": "2015-05-22T12:38:11.000Z",
  "updated": "2015-05-22T12:38:11.000Z",
  "title": "Searching for nova shells around cataclysmic variables",
  "authors": [
    "D. I. Sahman",
    "V. S. Dhillon",
    "C. Knigge",
    "T. R. Marsh"
  ],
  "comment": "14 pages, 50 figures, 3 Tables",
  "categories": [
    "astro-ph.HE",
    "astro-ph.SR"
  ],
  "abstract": "We present the results of a search for nova shells around 101 cataclysmic variables (CVs), using Halpha images taken with the 4.2-m William Herschel Telescope (WHT) and the 2.5-m Isaac Newton Telescope Photometric Halpha Survey of the Northern Galactic Plane (IPHAS). Both telescopes are located on La Palma. We concentrated our WHT search on nova-like variables, whilst our IPHAS search covered all CVs in the IPHAS footprint. We found one shell out of the 24 nova-like variables we examined. The newly discovered shell is around V1315 Aql and has a radius of approx.2.5 arcmin, indicative of a nova eruption approximately 120 years ago. This result is consistent with the idea that the high mass-transfer rate exhibited by nova-like variables is due to enhanced irradiation of the secondary by the hot white dwarf following a recent nova eruption. The implications of our observations for the lifetime of the nova-like variable phase are discussed. We also examined 4 asynchronous polars, but found no new shells around any of them, so we are unable to confirm that a recent nova eruption is the cause of the asynchronicity in the white dwarf spin. We find tentative evidence of a faint shell around the dwarf nova V1363 Cyg. In addition, we find evidence for a light echo around the nova V2275 Cyg, which erupted in 2001, indicative of an earlier nova eruption approx.300 years ago, making V2275 Cyg a possible recurrent nova.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-22T12:38:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cataclysmic variables",
      "nova shells",
      "nova eruption",
      "newton telescope photometric halpha survey",
      "nova-like variable"
    ],
    "publication": {
      "doi": "10.1093/mnras/stv1150"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1372581
    }
  }
}