Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-30T05:26:00.023Z Has data issue: false hasContentIssue false
  • English
  • Français

Hot Magnetic Stars

Published online by Cambridge University Press:  12 April 2016

K. Hunger
K. Hunger*
Affiliation:
Kiel

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The present discussion of hot magnetic CP stars is restricted to 17000 K < Teff < 30 000 K, the upper limit being the temperature up to which magnetic fields can be observed, the lower limit defining the boundary between He-rich and He-poor stars.

All of the hot magnetics belong to the class of intermediate helium stars which is defined by nH/nHe, < 3 (number ratio, Hunger 1975). Walborn (1983) lists 23 stars of this class, mostly with nH/nHe, ≈ 1, and of spectral type B2 V. Magnetic fields, so far, have been discovered in 7 of them (Borra et al. 1983). All but one of these are spectrum variables, with periods 0.9<P/day<1.7 (except one with P = 9.5 d), (Pedersen, 1979) and with rotational velocities of the order of v sin i ≈ 150 km/s which are compatible with the (P, v sin i)-relation of stars near the main sequence; i.e. these stars are oblique rotators.

Type
Section III - Magnetic CP Stars
Information
International Astronomical Union Colloquium , Volume 90: Upper Main Sequence Stars with Anomalous Abundances , 1986 , pp. 257 - 269
Copyright
Copyright © Reidel 1986

References

Barker, P., Brown, D.N., Bolton, C.T. and Landstreet, J.D: 1985, preprintGoogle Scholar
Bolton, C.T.: 1983, Harv. Obs. Bull. 7, 241 Google Scholar
Bonsack, W.K. and Dyck, H.M: 1983, Astron. Astrophys. 125, 29 Google Scholar
Borra, E.F., Landstreet, J.D. and Thompson, I.: 1983, Astrophys. J. Suppl. 53, 151 CrossRefGoogle Scholar
Brown, D.N., Shore, S.N. and Sonneborn, G.: 1985, Astron. J., in pressGoogle Scholar
Carpenter, K.G: 1985, Astrophys. J. 289, 660 CrossRefGoogle Scholar
Drake, S.A., Abbot, D.C., Bieging, J.H., Churchwell, E. and Linsky, J.L: 1985 Google Scholar
Groote, D., and Hunger, K.: 1977, Astron. Astrophys. 56, 129 Google Scholar
Groote, D., and Hunger, K.: 1982, Astron. Astrophys. 56, 64 Google Scholar
Groote, D. and Kaufmann, J.P: 1981, in The Chemically Peculiar Stars of the Upper Main Sequence, 23rd Liège Astrophysical Colloquium, p. 435 Google Scholar
Havnes, O.: 1981, in The Chemically Peculiar Stars of the Upper Main Sequence, 23rd Liège Astrophysical Colloquium, p. 403 Google Scholar
Havnes, O. and Goertz, C.K: 1984, Astron. Astrophys. 138, 421 Google Scholar
Heber, U.: 1979, Diploma ThesisGoogle Scholar
Heber, U.: 1985, private ccrattunicationGoogle Scholar
Heintz, W.D: 1974, Astrophys. J. 79, 397 Google Scholar
Hunger, K.: 1975, in Problems In Stellar Atmosphere and Envelopes, Baschek, , Kegel, and Traving, Editors, Springer-Verlag Berlin Heidelberg New York, p. 57 CrossRefGoogle Scholar
Jordan, S.: 1985, private communicationGoogle Scholar
Kaufmann, J.P. and Theil, U.: 1985, private communicationGoogle Scholar
Kurucz, R.L: 1979, Astrophys. J. Suppl. 40, 1 CrossRefGoogle Scholar
Madej, J.: 1981, in The Chemical Peculiar Stars of the Upper Main Sequence, 23rd Liège Astrophysical Colloquium, p. 379 Google Scholar
Odell, A.P. and Lebofsky, M.: 1984, Astron. Astrophys, 140, 468 Google Scholar
Pedersen, H.: 1979, Astron. Astrophys. J. Suppl. 35, 311 Google Scholar
Pedersen, H. and Thonsen, B.: 1977, Astron. Astropnys. Suppl. 30, 11 Google Scholar
Remie, H. and Lamers, H.J.G.L.M.: 1982, Astron. Astrophys, 105, 85.Google Scholar
Shore, S.N. and Adelman, S.: 1981, in The Chemically Peculiar Stars of the Upper Main Sequence, 23rd Liège Astrophysicsl Colloquium, p. 429 Google Scholar
Thompson, I.B. and Landstreet, J.D.: 1985, Astrophys. J. in pressGoogle Scholar
Walborn, N.: 1983, Astrophys. J. 268, 195 CrossRefGoogle Scholar
Walker, H.J.: 1985, preprintGoogle Scholar