{
  "id": "1010.3790",
  "version": "v1",
  "published": "2010-10-19T03:36:12.000Z",
  "updated": "2010-10-19T03:36:12.000Z",
  "title": "The Angular Diameter and Fundamental Parameters of Sirius A",
  "authors": [
    "J. Davis",
    "M. J. Ireland",
    "J. R. North",
    "J. G. Robertson",
    "W. J. Tango",
    "P. G. Tuthill"
  ],
  "comment": "Accepted for publication in PASA",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "The Sydney University Stellar Interferometer (SUSI) has been used to make a new determination of the angular diameter of Sirius A. The observations were made at an effective wavelength of 694.1 nm and the new value for the limb-darkened angular diameter is 6.048 +/- 0.040mas (+/-0.66%). This new result is compared with previous measurements and is found to be in excellent agreement with a conventionally calibrated measurement made with the European Southern Observatory's Very Large Telescope Interferometer (VLTI) at 2.176 microns (but not with a second globally calibrated VLTI measurement). A weighted mean of the SUSI and first VLTI results gives the limb-darkened angular diameter of Sirius A as 6.041 +/- 0.017mas (+/-0.28%). Combination with the Hipparcos parallax gives the radius equal to 1.713 +/- 0.009R_sun. The bolometric flux has been determined from published photometry and spectrophotometry and, combined with the angular diameter, yields the emergent flux at the stellar surface equal to (5.32+/- 0.14)x10^8 Wm^-2 and the effective temperature equal to 9845 +/- 64 K. The luminosity is 24.7 +/- 0.7 L_sun.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-10-19T03:36:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fundamental parameters",
      "limb-darkened angular diameter",
      "sydney university stellar interferometer",
      "stellar surface equal",
      "large telescope interferometer"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1071/AS10010",
      "journal": "Publications of the Astronomical Society of Australia",
      "year": 2011,
      "month": "Jan",
      "volume": 28,
      "number": 1,
      "pages": 58
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 873379,
      "adsabs": "2011PASA...28...58D"
    }
  }
}