Abstract
The spectrum of the peculiar Bp star HD 36916 has been studied on plates with dispersion 9.7 A/mm and compared with those of η Aur, B3V andi And, B8V. A comparison of the observed contours of Hβ, Hγ and of the Balmer discontinuity D with those computed by Mihalas gives the following results: HD 36916: θe=0.347, logg=3.8;i And: θe=0.383, logg=3.2; η Aur: θe=0.302, logg=3.6. HD 36916 presents the characteristics of the Si-λ4200 stars: strong deficiency in helium and probably also in oxygen and nitrogen, strong excess of silicon and strontium; 3984 Hgii is present. Moreover this star also has characteristics which are not common to Si-λ4200 stars but rather to Mn stars: excess by a factor of ten of the elements of the iron group and an excess larger, probably of the order of 100, for manganese. The star is a member of the Sword subgroup of the Orion association.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Auer, L. H., Mihalas, D., Aller, L. H., and Ross, J. E.: 1966,Astrophys. J. 145, 153
Bernacca, P. L.: 1967, Contr. Oss. Astr. Asiago N.195;Mem. Soc. Astron. Ital. 38, 169.
Bernacca, P. L.: 1968, Contr. Oss. Astr. Asiago N.202.
Buscombe, W.: 1951,Astrophys. J. 114, 73.
Chalonge, D. and Divan, L.: 1952,Ann. Astrophys. 15, 201.
De Jager, C. and Neven, L.: 1967,Bull. Astron. Inst. Neth. Suppl.2, 125.
Hack, M. and Struve, O.: 1969,Stellar Spectroscopy — Normal Stars, Publ. Trieste-Osservatorio Astronomico, p. 173.
Hyland, A. R.: 1967, inThe Magnetic and Related Stars (ed. by R. C. Cameron), Baltimore, p. 311.
Jaschek, M. and López García, Z.: 1966,Z. Astroph. 64, 217.
Johnson, H. L. and Morgan, W. W.: 1953,Astrophys. J. 117, 313.
McNamara, D. H. and Larsson, H. J.: 1962,Astrophys. J. 135, 748.
Mihalas, D.: 1964,Astrophys. J. Suppl. Ser. 9, 321.
Mihalas, D. and Henshaw, J. L.: 1966,Astrophys. J. 144, 25.
Petrie, R. M.: 1965,Publ. Dominion Astrophys. Obs. Victoria 12, 335.
Rodgers, A. W.: 1967,Observatory 87, 127.
Sargent, W. L. W. and Strittmatter, P. A.: 1966,Astrophys. J. 145, 938.
Sargent, W. L. W., Sargent, A. I., and Strittmatter, P. A.: 1967,Astrophys. J. 147, 1187.
Searle, L. and Sargent, W. L. W.: 1964,Astrophys. J. 139, 793.
Searle, L. and Sargent, W. L. W.: 1966,Astrophys. J. 145, 141.
Sharpless, S.: 1952,Astrophys. J. 116, 251.
Sharpless, S.: 1962,Astrophys. J. 136, 767.
Shenstone, A. G.: 1961,Proc. Roy. Soc. London, Ser. A 261, 153.
Slettebak, A.: 1954,Astrophys. J. 119, 146.
Slettebak, A.: 1955,Astrophys. J. 121, 102.
Strom, S. E. and Strom, K. M.: 1969,Astrophys. J. 155, 17.
Wolff, S. C.: 1967,Astrophys. J. Suppl. Ser. 15, 21.
Wright, K. O., Lee, E. K., Jacobson, T. V., and Greenstein, J. L.: 1964,Publ. Dominion Astrophys. Obs. Victoria 12, 173.