Abstract
The profiles of Hα observed during the 1970–1992 period in the binary hypergiant HR 8752 (G0 Ia) are presented. We distinguish five typical Hα profiles designated as A, B, C, D and E types according to the number of emission and absorption features. The profiles of Hα are complex and contain several emission and absorption components, with: −130 km/s in emission or absorption, −84 km/s in absorption, −49 km/s in emission and about +6 km/s in emission. All of them are rather stable in radial velocities except of the main absorption component in the P Cygni profile with −84 km/s. The frequency of appearance and the periods of duration of the occurrence of the components is discussed. The duration times range between about 3 to 10 months for various components. The red emission component E2 is particularly interesting. Possible explanations of its origin are discussed.
A long-term acceleration of the absorption component in the P Cygni profile is found; it can be interpreted as monotonous acceleration of the stellar wind.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
De Jager, C.: 1980,The Brightest Stars, D. Reidel Publ. Co., Dordrecht, Holland
Ferro, A. A.: 1985,Rev. Mexicana Astron. Astrof. 11, 113.
Higgs, L. A., Feldman, P. A. and Smolinski, J.: 1978,Astrophys. J. 220, L109.
Humphreys, R. M.: 1992, in C. De Jager and H. Nieuwenhuijzen (eds.),Instabilities in evolved super- and hypergiants, 13.
Imhoff, C. L.: 1977,Astrophys. J. 214, 773.
Lambert, D. L. and Luck, R. E.: 1978,Monthly Notices Roy. Astron. Soc. 184, 405.
Luck, R. E. and Lambert, D. L.: 1981,Astrophys. J. 245, 1018.
Piters, A., De Jager, C., and Nieuwenhuijzen, H.: 1988,Astron. Astrophys. 196, 115.
Sargent, W. L. W.: 1965,Observatory 85, 33.
Smolinski, J.: 1971, inColloquium on Supergiant Stars, ed. M. Hack, Osservatorio Astronomico di Trieste, Trieste, p. 68
Smolinski, J., Feldman, P. A. and Higgs, L. A.: 1977,Astron. Astrophys. 60, 277
Smolinski, J., Climenhaga, J. L., and Fletcher, J.M.: 1982,Inf. Bull. Var. Stars, No. 2229.
Smolinski, J., Climenhaga, J. L., and Fletcher, J.M.: 1986,Symposium on Luminous Stars and Associations in Galaxies, eds. De Loore, C.W.H., Willis, A.J., Laskarides, 89.
Smolinski, J., Climenhaga, J. L., and Fletcher, J.M.: 1989,Physics of Luminous Blue Variables, eds. Davidson, K., Moffat, A. F. J., Lamers, H. J. G. L. M., 131.
Stickland, D. J. and Harmer, D. L.: 1978,Astron. Astrophys. 70, L53.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Smolinski, J., Climenhaga, J.L., Huang, Y. et al. The complex Hα profile of the hypergiant HR 8752 during 1970–1992. Space Sci Rev 66, 231–236 (1993). https://doi.org/10.1007/BF00771072
Issue Date:
DOI: https://doi.org/10.1007/BF00771072