References
L. Celis S., “Red variable stars. I. UBVRI photometry and photometric properties,” Astron. J.,87, No. 12, 1791–1802 (1982).
R. A. Vardanyan, M. O. Zakaryan, and M. S. Mirzoyan, Soobshcheniya Byurakanskoi Observatorii,52, 24 (1980).
J. Smak and R. F. Wing, Acta Astronomica,29, 187 (1979).
G. Neugebauer and R. B. Leighton, NASA SP-3047, Jet Propulsion Laboratory, Pasadena, Calif. (1969), p. 305.
P. G. Kulikovskii, A Handbook for Amateur Astronomers [in Russian], Nauka (1971), p. 530.
G. V. Abramyan, Soobshcheniya Byurakanskoi Observatorii,52, 24 (1980).
D. A. Allen and D. T. Wickramsinghe, Astrophys. Space Sci.,97, 369 (1983).
R. M. Humphreys, “Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way,” Astrophys. J., Suppl. Ser.,38, No. 4, 309–350 (1978).
R. A. Vardanyan, Soobshcheniya Byurakanskoi Observatorii,54, 27 (1983).
R. A. Vardanyan, Astrofizika,22, 335 (1985).
R. A. Vardanyan, Astrofizika,6, 77 (1970).
H. H. Human, F. C. Gillet, C. A. Beichman, T. DeJong, J. R. Houck, F. J. Low, G. Neugebauer, and P. R. Wesselius. Astrophys. J. Lett.,278, Pt. 2, L23-L (1984).
C. G. Wynn-Williams and D. P. Cruikshank, Infrared Astronomy [Russian translation], Mir, Moscow (1983), p. 440.
R. A. Vardanyan, Soobshcheniya Byurakanskio Observatorii,58, 21 (1986).
Additional information
Byurakan Astrophysical Observatory, Byruakan, Armenia. Translated from Astrofizika, Vol. 36, No. 4, pp. 535–542, October–December, 1993.
Rights and permissions
About this article
Cite this article
Vardanyan, R.A. Circumstellar envelopes and the spectroscopic classification of stars. Astrophysics 36, 318–322 (1993). https://doi.org/10.1007/BF01006223
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01006223