{
  "id": "1007.3441",
  "version": "v1",
  "published": "2010-07-20T14:51:46.000Z",
  "updated": "2010-07-20T14:51:46.000Z",
  "title": "Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models. I. Theory and practical implementation",
  "authors": [
    "Szabolcs Barcza"
  ],
  "comment": "8 pages, 3 figures",
  "journal": "MNRAS, 2010, 406, p 486-492",
  "doi": "10.1111/j.1365-2966.2010.16676.x",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "A photometric calibration of Kurucz static model atmospheres is used to obtain the following parameters of RR Lyrae stars: variation of stellar angular radius $\\vartheta$, effective temperature $T_{\\rm e}$, gravity $g_{\\rm e}$ as a function of phase, interstellar reddening $E(B-V)$ towards the star and atmospheric metallicity $M$. Photometric and hydrodynamic conditions are given to find the phases of pulsation when the quasi-static atmosphere approximation (QSAA) can be applied. The QSAA is generalized to a non-uniformly moving spherical atmosphere, and the distance $d$, mass ${\\cal M}$ and atmospheric motion are derived from the laws of mass and momentum conservation. To demonstrate the efficiency of the method, the $UBV(RI)_C$ photometry of SU Dra was used to derive the following parameters: $[M]=-1.60\\pm .10$~dex, $E(B-V)=0.015\\pm .010$, $d=663\\pm 67$~pc, ${\\cal M}=(0.68\\pm .03){\\cal M}_\\odot$, equilibrium luminosity $L_{\\rm eq}=45.9\\pm 9.3L_\\odot$ and $T_{\\rm eq}=6813\\pm 20$~K.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-07-20T14:51:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "rr lyrae stars",
      "kurucz atmospheric models",
      "fundamental parameters",
      "multicolour photometry",
      "practical implementation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Wiley-Blackwell",
      "journal": "J. Finance"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 861975,
      "adsabs": "2010arXiv1007.3441B"
    }
  }
}