{
  "id": "1307.8023",
  "version": "v2",
  "published": "2013-07-30T15:50:11.000Z",
  "updated": "2013-10-10T12:04:35.000Z",
  "title": "Planetary nebulae after common-envelope phases initiated by low-mass red giants",
  "authors": [
    "Philip D. Hall",
    "Christopher A. Tout",
    "Robert G. Izzard",
    "Denise Keller"
  ],
  "comment": "Published in MNRAS. 12 pages, 12 figures. Minor changes to match published version",
  "journal": "Mon. Not. R. Astron. Soc. 435 (2013) 2048-2059",
  "doi": "10.1093/mnras/stt1422",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "It is likely that at least some planetary nebulae are composed of matter which was ejected from a binary star system during common-envelope (CE) evolution. For these planetary nebulae the ionizing component is the hot and luminous remnant of a giant which had its envelope ejected by a companion in the process of spiralling-in to its current short-period orbit. A large fraction of CE phases which end with ejection of the envelope are thought to be initiated by low-mass red giants, giants with inert, degenerate helium cores. We discuss the possible end-of-CE structures of such stars and their subsequent evolution to investigate for which structures planetary nebulae are formed. We assume that a planetary nebula forms if the remnant reaches an effective temperature greater than 30 kK within 10^4 yr of ejecting its envelope. We assume that the composition profile is unchanged during the CE phase so that possible remnant structures are parametrized by the end-of-CE core mass, envelope mass and entropy profile. We find that planetary nebulae are expected in post-CE systems with core masses greater than about 0.3 solar masses if remnants end the CE phase in thermal equilibrium. We show that whether the remnant undergoes a pre-white dwarf plateau phase depends on the prescribed end-of-CE envelope mass. Thus, observing a young post-CE system would constrain the end-of CE envelope mass and post-CE evolution.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-10-10T12:04:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "planetary nebula",
      "low-mass red giants",
      "common-envelope phases",
      "envelope mass",
      "ce phase"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2013,
      "month": "Nov",
      "volume": 435,
      "number": 3,
      "pages": 2048
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1245217,
      "adsabs": "2013MNRAS.435.2048H"
    }
  }
}