{
  "id": "2005.07754",
  "version": "v1",
  "published": "2020-05-15T19:27:34.000Z",
  "updated": "2020-05-15T19:27:34.000Z",
  "title": "Properties of Galactic B[e] Supergiants: V. 3 Pup -- constraining the orbital parameters and modeling the circumstellar environments",
  "authors": [
    "A. S. Miroshnichenko",
    "S. Danford",
    "S. V. Zharikov",
    "V. G. Klochkova",
    "E. L. Chentsov",
    "D. Vanbeveren",
    "O. V. Zakhozhay",
    "N. Manset",
    "M. A. Pogodin",
    "C. T. Omarov",
    "A. K. Kuratova",
    "S. A. Khokhlov"
  ],
  "comment": "13 pages, 9 figures, 4 tables, accepted in The Astrophysical Journal",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We report the results of a long-term spectroscopic monitoring of the A-type supergiant with the B[e] phenomenon 3 Pup = HD 62623. We confirm earlier findings that it is a binary system. The orbital parameters were derived using cross-correlation of the spectra in a range of 4460-4632 A, which contains over 30 absorption lines. The orbit was found circular with a period of $137.4\\pm0.1$ days, radial velocity semi-amplitude $K_{1} = 5.0\\pm0.8$ km s$^{-1}$, systemic radial velocity $\\gamma = +26.4\\pm2.0$ km s$^{-1}$, and the mass function $f(m) = (1.81^{+0.97}_{-0.76})\\times10^{-3}$ M$_{\\odot}$. The object may have evolved from a pair with initial masses of $\\sim$6.0 M$_{\\odot}$ and $\\sim$3.6 M$_{\\odot}$ with an initial orbital period of $\\sim$5 days. Based on the fundamental parameters of the A-supergiant (luminosity $\\log$ L/L$_{\\odot} = 4.1\\pm$0.1 and effective temperature T$_{\\rm eff} = 8500\\pm$500 K) and evolutionary tracks of mass-transferring binaries, we found current masses of the gainer M$_{2} = 8.8\\pm$0.5 M$_{\\odot}$ and donor M$_{1} = 0.75\\pm0.25$ M$_{\\odot}$. We also modeled the object's IR-excess and derived a dust mass of $\\sim 5\\,\\times10^{-5}$ M$_{\\odot}$ in the optically-thin dusty disk. The orbital parameters and properties of the H$\\alpha$ line profile suggest that the circumstellar gaseous disk is predominantly circumbinary. The relatively low mass of the gainer led us to a suggestion that 3 Pup should be excluded from the B[e] supergiant group and moved to the FS CMa group. Overall these results further support our original suggestion that FS CMa objects are binary systems, where an earlier mass-transfer caused formation of the circumstellar envelope.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-05-15T19:27:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "orbital parameters",
      "circumstellar environments",
      "supergiant",
      "properties",
      "binary system"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}