{
  "id": "1608.00456",
  "version": "v1",
  "published": "2016-08-01T14:48:20.000Z",
  "updated": "2016-08-01T14:48:20.000Z",
  "title": "Study of Eclipsing Binary and Multiple Systems in OB Associations IV: Cas OB6 Member DN Cas",
  "authors": [
    "V. Bakis",
    "H. Bakis",
    "S. Bilir",
    "Z. Eker"
  ],
  "comment": "10 pages, including 5 figures and 5 tables, accepted for publication in PASA",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "An early-type, massive, short-period ($P_{\\rm orb}=2^{\\rm d}.310951$) eclipsing spectroscopic binary DN Cas has been re-visited with new spectral and photometric data. The masses and radii of the components have been obtained as $M_1=19.04\\pm0.07 M_\\odot$, $M_2=13.73\\pm 0.05M_\\odot$ and $R_1=7.22\\pm0.06 R_\\odot$, $R_2=5.79\\pm0.06R_\\odot$, respectively. Both components present synchronous rotation ($V_{\\rm rot1}=160\\,$km s$^{-1}$, $V_{\\rm rot2}=130\\,$km s$^{-1}$) with their orbit. Orbital period analysis yielded a physically bound additional component in the system with a minimum mass of $M_3=0.88 M_\\odot$ orbiting in an eccentric orbit ($e=0.37\\pm0.2$) with an orbital period of $P_{12}=42\\pm9$ yrs. High precision absolute parameters of the system allowed us to derive a distance to DN Cas as 1.7$\\pm$0.2 kpc which locates the system within the borders of the Cas OB6 association (d=1.8 kpc; Mel'nik & Dambis, 2009). The space velocities and the age of DN Cas are in agreement with those of Cas OB6. The age of DN Cas ($\\tau=$3-5 Myr) is found to be 1-2 Myr older than the embedded clusters (IC 1795, IC 1805 and IC 1848) in the Cas OB6 association, which implies a sequential star formation in the association.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-08-01T14:48:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cas ob6 member dn cas",
      "ob associations",
      "multiple systems",
      "spectroscopic binary dn cas",
      "eclipsing binary"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}