{
  "id": "astro-ph/9912357",
  "version": "v1",
  "published": "1999-12-16T18:31:38.000Z",
  "updated": "1999-12-16T18:31:38.000Z",
  "title": "On the Transition from AGB Stars to Planetaries: The Spherical Case",
  "authors": [
    "Detlef Schoenberner",
    "Matthias Steffen"
  ],
  "comment": "To appear in ``Asymmetrical Planetary Nebulae II: from Origins to Microstructures'', ASP Conference Series, Vol. 199, 2000; J.H. Kastner, N. Soker, & S.A. Rappaport, eds",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We discuss the basic physical model and the relevant processes responsible for creating and shaping planetary nebulae out of a cool AGB wind envelope. We show that a hydrodynamical treatment along the upper AGB leads quite naturally to more realistic starting configurations for planetaries with density slopes steeper than r^{-2}. Taking into account photoionization and wind interaction in a realistic manner, the hydrodynamics of post-AGB wind envelopes leads to density structures and velocity fields in close resemblance to observations of spherical or elliptical planetary nebulae.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-12-16T18:31:38.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "agb stars",
      "spherical case",
      "cool agb wind envelope",
      "transition",
      "post-agb wind envelopes"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 520878
    }
  }
}