Abstract
The photoelectric spectrophotometric scans of γ Cas have been analysed to find the stellar and envelope parameters. The absolute energy distribution of γ Cas covering the wavelength interval λ350–700 nm have been given. Its effective temperature and gravity have been estimated by a comparison of the observed energy distribution curves with appropriate model atmospheres. The temperature has also been determined by Zanstra's method from the total energy emitted in the Hα-line. The mass, radius, luminosity, photospheric electron density and mass-ejection rate for γ Cas have been derived. An estimate of the extension of the stellar envelope has been made by use of the dilution factor obtained from the Balmer decrement. Electron density and electron temperature in the envelope are estimated.
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Aller, L. H.: 1954,Nuclear Transformation, Stellar Interiors and Nebulae (2nd edn), Vol. 2, Ronald Press, New York, p. 141.
Baldwin, R. B.: 1940,Astrophys. J. 92, 82.
Cowley, A. P. and Marlborough, J. M.: 1968,Publ. Astron. Soc. Pacific 80, 42.
Gray, D. F.: 1967,Astrophys. J. 149, 317.
Hayes, D. S. and Latham, D. W.: 1975,Astrophys. J. 197, 593.
Hayes, D. S.: 1978, in A. G. Davis Philip and D. S. Hayes (eds), ‘The HR Diagram’,IAU Symp.80, 65.
Hercot, D. M., Jamar, C., Momfils, A., Thompson, G. I., Houziaux, L. and Wilson, R.: 1978. Supplement to theUltraviolet Bright-Star Spectrophotometric Catalogue, European Space Agency, SR-28, p. 6.
Hutchings, J. B.: 1970,Monthly Notices Roy. Astron. Soc. 150, 55.
Kogure, T.: 1959,Publ. Astron. Soc. Japan 11, 278.
Kogure, T.: 1961,Publ. Astron. Soc. Japan 13, 335.
Kuirucz, R. L., Peytremann, E. and Avrett, E. H.: 1974,Blanketed Model Atmospheres for Early-Type Stars, Smithsonian Institution, Washington, D.C.
Lesh, J. R. 1968,Astrophys. J. Suppl. 17, 395.
Marlborough, J. M.: 1969,Astrophys. J. 156, 135.
Oke: 1965,Ann. Rev. Astron. Astrophys. 3, 23.
Poeckert, R. and Marlborough, J. M.: 1978,Astrophys. J. 220, 940.
Schild, R. E.: 1977,Astrophys. J. 82, 337.
Sobolev, V. V.: 1960,Moving Envelopes of Stars, Harvard University Press, Cambridge, Mass., p. 20.
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Goraya, P.S. Scanner observations of gamma Cassiopeiae. Astrophys Space Sci 73, 319–326 (1980). https://doi.org/10.1007/BF00642410
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DOI: https://doi.org/10.1007/BF00642410