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Spectrum variability of some selected bright CP stars on the main sequence

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Abstract

The initial findings of a survey for spectrum variations in selected CP stars is reported. It is found that almost all observed mercury-manganese stars are spectrum variables. The implications of chemical anomalies in these stars is briefly discussed. In particular, arguments are advanced against the general assumption that CP3 stars are non-magnetic. The observed low rotational velocities of the CP3 stars is interpreted as rotational braking by magnetic fields mostly in the pre-Main-Sequence stage of evolution of these objects. We advance the hypothesis that high resolution spectroscopic observations of such stars would exhibit Zeeman-broadening in lines that vary in strength and are also sensitive to the magnetic field.

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References

  • Borra, E. F. and Landstreet, J. D.: 1980,Astrophys. J. Suppl. 42, 421.

    Google Scholar 

  • Catalano, F. A. and Renson, P.: 1984,Astron. Astrophys. Suppl. Ser. 55, 371.

    Google Scholar 

  • Cowley, C. R.: 1975, in W. W. Weiss, J. Jenkner, and H. J. Wood (eds.),Physics of Ap Stars, Universitäts Sternwarte, Wien, p. 275.

    Google Scholar 

  • Deutsch, S. J.: 1958, in S. Flügge (ed.),Handbuch Phys. 51, 689, Springer-Verlag, Berlin.

    Google Scholar 

  • Dworetsky, M. M.: 1985, in C. R. Cowley, M. M. Dworetsky, and C. Megessier (eds.),IAU Colloq. 90, 397.

  • Hack, M.: 1981,Upper Main Sequence Chemically Peculiar Star, Liège Collquium, Liège, p. 79.

  • Hoffleit, D. and Jaschek, C.: 1982,The Bright Star Catalogue, 4th revised edition, Yale Univ. Obs., Connecticut, U.S.A.

    Google Scholar 

  • Landstreet, J. D.: 1982,Astrophys. J. 258, 639.

    Google Scholar 

  • Michaud, G.: 1970,Astrophys. J. 160, 641.

    Google Scholar 

  • Moss, D.: 1985, in C. R. Cowley, M. M. Dworetsky, and C. Megessier (eds.),IAU Colloq. 90, 1.

  • Rajamohan, R. and Paranjpye, A.: 1989,Inf. Bull. Var. Stars, No. 3284.

  • Rajamohan, R. and Venkatakrishnan, P.: 1981,Bull. Astron. Soc. India 9, 309.

    Google Scholar 

  • Stibbs, D. W. N.: 1950,Monthly Notices Roy. Astron. Soc. 110, 395.

    Google Scholar 

  • Wolff, S. C. and Wolff, R. J.: 1975, in W. W. Weiss, H. Jenkner, and H. J. Wood (eds.),IAU Colloq. 32, 503.

  • Zahn, J. P.: 1975,Astron. Astrophys. 41, 329.

    Google Scholar 

  • Zahn, J. P.: 1979,Astron. Astrophys. 57, 383.

    Google Scholar 

Download references

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  1. Indian Institute of Astrophysics, Bangalore, India

    R. Rajamohan

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  1. R. Rajamohan
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Rajamohan, R. Spectrum variability of some selected bright CP stars on the main sequence. Astrophys Space Sci 165, 219–223 (1990). https://doi.org/10.1007/BF00653290

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  • DOI: https://doi.org/10.1007/BF00653290

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