천문학회지 (Journal of The Korean Astronomical Society)

  • 제42권3호
  • /
  • Pages.47-54
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  • 2009
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  • 1225-4614(pISSN)
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  • 2288-890X(eISSN)
한국천문학회 (The Korean Astronomical Society)
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A CODE FOR CALCULATING STATIC MODEL STELLAR ATMOSPHERES

  • Nouh, M.I. (National Research Institute of Astronomy and Geophysics)
  • 발행 : 2009.06.30
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초록

In this paper we present an independent FORTRAN code for calculating LTE-plane-parallel model atmospheres. The transfer equation has been solved using Avrett and Loeser method. It is shown that, using an approximate non-gray temperature distribution together with the iteration factors method (Simonneau and Crivellari) for correcting the temperature distribution reduce the number of iteration required to achieve the condition of radiative equilibrium. Preliminary results for pure helium model atmospheres are presented.

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참고문헌

  1. Auer L. H., Mihalas D., 1972, Non-Lte Model Atmospheres. VII. The Hydrogen and Helium Spectra of the O Stars, ApJS 24, 193 https://doi.org/10.1086/190253
  2. Avrett, E. H. & Loeser, R., 1963, A simple and accurate method for the evaluation of the Milne integrals, JQSRT, 3, 201 https://doi.org/10.1016/0022-4073(63)90065-7
  3. Code, A. D, Davis, J, Bless, R. C, & Brown, R. H., 1976, Empirical effective temperatures and bolometric corrections for early-type stars, ApJ, 203, 417 https://doi.org/10.1086/154093
  4. Hasegawa, Y. & Uesugi, A., 1967, Memoirs of the College of Science, Unversity of Kyoto, Series A, vol.31, 303-309
  5. Hubeny I., 1997, in Stellar Atmospheres: Theory and Observations, eds. De Gr$\'{e}$ve J. P., Blomme R., Hensberge H., Springer, p. 1
  6. Klinglesmith, D. A., 1967, Ph.D, Indiana University
  7. Kudritzki R. P., 1997, Quantitative Spectroscopy of the Brightest Blue Supergiant References 23 Stars in Galaxies in Proceedings of the 8th Canary Winter School: Stellar Astrophysics for the Local Group, a First step to the Universe. eds. Aparicio A., Herrero A., Cambridge University Press
  8. Kurucz, R., 1979, Model atmospheres for G, F, A, B, and O stars, ApJS, 40, 1 https://doi.org/10.1086/190589
  9. Matthews, T. A. & Sandage, A. R., 1963, Optical Identification of 3c 48, 3c 196, and 3c 286 with Stellar Objects, ApJ, 138, 30 https://doi.org/10.1086/147615
  10. Mihalas, D., 1967, Methods In Computational Physics, Volume 7, Astrophysics, Academic Press
  11. Mihalas, D., 1978, Stellar Atmospheres, W. H Freeman and Company
  12. Simonneau, E. & Crivellari, L., 1988, On the application of iteration factors for temperature correction in stellar atmospheres, ApJ, 330, 415 https://doi.org/10.1086/166480
  13. Underhill, A., 1949, On the Effect of Radiation Pressure in the Atmospheres of Early-Type Stars, MNRAS, 109, 562 https://doi.org/10.1093/mnras/109.5.562