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HD 166596: A Silicon Star With Hα Emission?

Published online by Cambridge University Press:  23 September 2016

R. Hirata ,
D.N. Dawanas  and
G. Jasniewicz
R. Hirata
Affiliation:
Department of Astronomy, University of Kyoto, Kyoto, Japan
D.N. Dawanas
Affiliation:
Department of Astronomy and Bosscha Observatory, Bandung Institute of Technology, Bandung, Indonesia
G. Jasniewicz
Affiliation:
Observatoire de Strasbourg, 11 Rue de 1'Universite, F-67000 Strasbourg, France

Extract

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The spectral type of HD 166596 (HR 6804) is given as B2.5III in The Bright Star Catalogue (Hoffleit and Jaschek 1982) and as B2HIII by Houk (1978). Its rotational velocity, Vsin i, is 255 km s-1 (Uesugi and Fukuda 1982). Neubauer (1930) noted that its radial velocity is probably variable. Bidelman and MacConnell (1973) designated this star as a silicon star, and thereafter, Renson and Manfroid (1980) found its photometric period, P = 1.67 ± 0.01 days (or 0.83 days) with the amplitudes of 0ṃ04 ∼ 0ṃ05 from their four-color photometry. To the best of our knowledge, there is no report on the presence of any emission line in the foregoing literature.

Type
III. The Circumstellar Gas
Information
International Astronomical Union Colloquium , Volume 92: Physics of Be Stars , August 1987 , pp. 289 - 290
Copyright
Copyright © Cambridge University Press 1987

References

Bidelman, W.P. & MacConnell, D.J.: 1973, A. J., 78, 687.Google Scholar
Castor, J.I. & Lamers, H.J.G.L.M.: 1979, Ap. J. Suppl., 39, 481.CrossRefGoogle Scholar
Cramers, N. & Maeder, A.: 1979, A&A, 78, 305.Google Scholar
Cramers, N. & Maeder, A.: 1980, A&A, 88, 135.Google Scholar
Hoffleit, D. & Jaschek, C.: 1982, The Bright Star Catalogue, 4th ed. (Yale University Observatory, New Haven).Google Scholar
Houk, N.: 1978, Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, Vol. 2 (Dept. Astronomy, Univ. Michigan, Ann Arbor, Michigan).Google Scholar
Neubauer, F.J.: 1930, Lick Obs. Bull., 15, 46.Google Scholar
Renson, P. & Manfroid, J.: 1980, IBVS No. 1755.Google Scholar
Uesugi, A. & Fukuda, I.: 1982, Revised Catalogue of Stellar Rotational Velocities (Dept. Astronomy, Kyoto Univ., Kyoto).Google Scholar