Skip to main content
SpringerLink
Log in

Recent progress in CP star detection and classification

  • Published:
Astrophysics and Space Science Aims and scope Submit manuscript

Abstract

Chemically peculiar (CP) stars are mainly found among B and A stars. Present theories are not able to account fully for the observed spectrum anomalies, suggesting that in the atmospheres of stars in the range ofT e , where mass loss is no longer very large and convection is still not very important, the present theoretical approach needs further refinement. Moreover, the lack of laboratory data is responsible, at least partly, for the discrepancies between observed and computed stellar energy distributions.

The choice for quick detection of CP stars among faint objects is reviewed; the measure of the flux depression at λ5200 appears to be very powerful, and the identification of this complex feature is urgently needed.

The need to separate the various subclasses of the He abnormal stars in a standard way is underlined and further analyses of the characteristics of the λ Boo stars are required.

The problem of the determination ofT e and consequently of realistic atmospheric abundance anomalies of CP stars is discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Abt, H. A.: 1983,Lowell Bull. 9, 118.

    Google Scholar 

  • Abt, H. A.: 1984a,Astrophys. J. 285, 247.

    Google Scholar 

  • Abt, H. A.: 1984b, in R. F. Garrison (ed.),MK Process and Stellar Classification, David Dunlap Obs., p. 340.

  • Adelman, S. J.: 1983,Astron. Astrophys. Suppl. 51, 511.

    Google Scholar 

  • Adelman, S. J.: 1984a,Astron. Astrophys. Suppl. 55, 479.

    Google Scholar 

  • Adelman, S. J.: 1984b,Astron. Astrophys. 141, 362.

    Google Scholar 

  • Artru, M. C.: 1986,Astron. Astrophys. 168, L5.

    Google Scholar 

  • Artru, M. C. and Lanz, T.: 1986, in C. R. Cowley, M. M. Dworetsky, and C. Mégessier (eds.),Upper Main Sequence Stars with Anomalous Abundances, D. Reidel Publ. Co., Dordrecht, Holland, p. 105.

    Google Scholar 

  • Artru, M. C., Jamar, C., Petrini, D., and Praderie, F.: 1981a,Astron. Astrophys. Suppl. 44, 171.

    Google Scholar 

  • Artru, M. C., Jamar, C., Petrini, D., and Praderie, F.: 1981b,Astron. Astrophys. 96, 380.

    Google Scholar 

  • Babu, G. S. D. and Shylaja, B. S.: 1981,Astrophys. Space Sci. 79, 243.

    Google Scholar 

  • Babu, G. S. D. and Shylaja, B. S.: 1982,Astrophys. Space Sci. 83, 367.

    Google Scholar 

  • Barker, P. K., Brown, D. N., Bolton, C. T., and Landstreet, J. D.: 1982, in Y. Kondo, J. M. Mead, and R. D. Chapman (eds.),Advances in UV Astronomy: Four Years of IUE Research, NASA CP-2238, p. 589.

  • Baruch, J. E. F., Griffiths, W. K., Groote, D., Mountain, C. M., Nittmann, J., Selby, M. J., and Shallis, M. J.: 1983.Monthly Notices Roy. Astron. Soc. 202, 691.

    Google Scholar 

  • Baschek, B., Heck, A., Jaschek, C., Jaschek, M., Koppen, J., Scholz, M., and Wehrse, R.: 1984,Astron. Astrophys. 131, 378.

    Google Scholar 

  • Blackwell, D. E., Shallis, M. J., and Selby, M. J.: 1979,Monthly Notices Roy. Astron. Soc. 188, 847.

    Google Scholar 

  • Böhm-Vitense, E.: 1981,Ann. Rev. Astron. Astrophys. 19, 295.

    Google Scholar 

  • Bonsack, W. K. and Dyck, H. M.: 1983,Astron. Astrophys. 125, 29.

    Google Scholar 

  • Borra, E. F. and Landstreet, J. D.: 1978,Astrophys. J. 222, 226.

    Google Scholar 

  • Borra, E. F. and Landstreet, J. D.: 1979,Astrophys. J. 228, 809.

    Google Scholar 

  • Borra, E. F., Landstreet, J. D., and Thompson, I.: 1983,Astrophys. J. Suppl. 53, 151.

    Google Scholar 

  • Breger, M.: 1976,Astrophys. J. Suppl. 32, 7.

    Google Scholar 

  • Carpenter, K. G.: 1985,Astrophys. J. 289, 660.

    Google Scholar 

  • Cowley, C. R.: 1981,Astrophys. J. 246, 238.

    Google Scholar 

  • Cowley, C. R., Sears, R. L., Aikman, G. C. L., and Sadakane, K.: 1982,Astrophys. J. 254, 191.

    Google Scholar 

  • Cramer, N.: 1984,Astron. Astrophys. 132, 283.

    Google Scholar 

  • Cramer, N. and Maeder, A.: 1979,Astron. Astrophys. 78, 305.

    Google Scholar 

  • Didelon, P.: 1986,Rev. Mexicana Astron. Astrofis. 12, 163.

    Google Scholar 

  • Gerbaldi, M., Hauck, B., and Morguleff, N.: 1974,Astron. Astrophys. 30, 105.

    Google Scholar 

  • Gigas, D.: 1986,Astron. Astrophys. 165, 170.

    Google Scholar 

  • Groote, D. and Kaufmann, J. P.: 1984,Astron. Astrophys. 130, 184.

    Google Scholar 

  • Hauck, B.: 1986,Astron. Astrophys. 154, 349.

    Google Scholar 

  • Hauck, B. and North, P.: 1982,Astron. Astrophys. 114, 23.

    Google Scholar 

  • Hauck, B. and Slettebak, A.: 1983,Astron. Astrophys. 127, 231.

    Google Scholar 

  • Holweger, H., Gigas, D., and Steffen, M.: 1986,Astron. Astrophys. 155, 58.

    Google Scholar 

  • Hunger, K.: 1975, in B. Baschek, W. H. Kegel, and G. Traving (eds.),Problems in Stellar Atmospheres and Envelopes, Springer-Verlag, Berlin, p. 57.

    Google Scholar 

  • Jaschek, M. and Egret, D.: 1982,Catalog of Stellar Groups, Part 1, Publ. Spéciale du CDS, No 4.

  • Jaschek, M. and Jaschek, C.: 1974,Astron. Astrophys. 36, 401.

    Google Scholar 

  • Jaschek, C. and Jaschek, M.: 1981,23th Liège Colloq., p. 417.

  • Jaschek, M. and Jaschek, C.: 1984, in R. F. Garrison (ed.),MK Process and Stellar Classification, David Dunlap Obs., p. 290.

  • Lane, M. C. and Lester, J. B.: 1984,Astrophys. J. 281, 723.

    Google Scholar 

  • Lanz, T.: 1984,Astron. Astrophys. 139, 161.

    Google Scholar 

  • Lanz, T.: 1985,Astron. Astrophys. 144, 191.

    Google Scholar 

  • Lub, J. and Pel, J. W.: 1977,Astron. Astrophys. 54, 137.

    Google Scholar 

  • Maitzen, H. M.: 1984,Astron. Astrophys. 138, 493.

    Google Scholar 

  • Maitzen, H. M. and Muthsam, H.: 1980,Astron. Astrophys. 83, 334.

    Google Scholar 

  • Maitzen, H. M. and Seggewiss, W.: 1980,Astron. Astrophys. 83, 328.

    Google Scholar 

  • Maitzen, H. M. and Vogt, N.: 1983,Astron. Astrophys. 123, 48.

    Google Scholar 

  • Malagnini, M. L., Faraggiana, R., Morossi, C., and Crivellari, L.: 1982,Astron. Astrophys. 114, 170.

    Google Scholar 

  • Malagnini, M. L., Faraggiana, R., and Morossi, C.: 1983,Astron. Astrophys. 128, 375.

    Google Scholar 

  • Michaud, G.: 1986, in C. R. Cowley, M. M. Dworetsky, and C. Mégessier (eds.),Upper Main Sequence Stars with Anomalous Abundances, D. Reidel Publ. Co., Dordrecht, Holland, p. 459.

    Google Scholar 

  • Michaud, G., Tarasick, D., Charland, Y. and Pelletier, C.: 1983,Astrophys. J. 269 239.

    Google Scholar 

  • Mihalas, D.: 1966,Astrophys. J. Suppl. 13, 1.

    Google Scholar 

  • Muciek, M., Gertner, J., North, P., and Rufener, F. G.: 1984, inMagnetic Stars, 6th Conference Subcommission 4, Riga, p. 54.

  • Nicolet, B.: 1983,Astron. Astrophys. Suppl. 51, 245.

    Google Scholar 

  • Nicolet, B. and Cramer, N.: 1983,Astron. Astrophys. 117, 248.

    Google Scholar 

  • North, P., Hauck, B., and Straižys, V.: 1982,Astron. Astrophys. 108, 373.

    Google Scholar 

  • Odell, A. P. and Lebofsky, M.: 1984,Astron. Astrophys. 140, 468.

    Google Scholar 

  • Olsen, E. H.: 1979,Astron. Astrophys. Suppl. 37, 367.

    Google Scholar 

  • Osmer, P. S. and Peterson, D. M.: 1974,Astrophys. J. 187, 117.

    Google Scholar 

  • Preston, G. W.: 1969,Astrophys. J. 156, 967.

    Google Scholar 

  • Preston, G. W.: 1974,Ann. Rev. Astron. Astrophys. 12, 257.

    Google Scholar 

  • Przybylski, A.: 1977,Monthly Notices Roy. Astron. Soc. 178, 735.

    Google Scholar 

  • Rountree-Lesh, J.: 1982,B Stars with and without Emission Lines, NASA SP-456.

  • Sadakane, K.: 1981,Publ. Astron. Soc. Pacific 93, 587.

    Google Scholar 

  • Sadakane, K. and Nishida, M.: 1986,Publ. Astron. Soc. Pacific 98, 685.

    Google Scholar 

  • Shallis, M. J., Baruch, J. E. F., Booth, A. J., and Selby, M. J.: 1985,Monthly Notices Roy. Astron. Soc. 213, 307.

    Google Scholar 

  • Shallis, M. J. and Blackwell, D. E.: 1979,Astron. Astrophys. 79, 48.

    Google Scholar 

  • Stepien, K.: 1984,Astron. Nachr. 305, 311.

    Google Scholar 

  • Stepien, K. and Muthsam, H.: 1980,Astron. Astrophys. 92, 171.

    Google Scholar 

  • Walborn, N. R.: 1983,Astrophys. J. 268, 195.

    Google Scholar 

  • Wegner, G., Cummins, D. J., Byrne, P. B., and Stickland, D. J.: 1983,Astrophys. J. 272, 646.

    Google Scholar 

  • Wiertz, M. J. J. and van Genderen, A. M.: 1983,Astron. Astrophys. 121, 35.

    Google Scholar 

  • Wolff, S. C.: 1983,The A Stars, Problems and Perspectives, NASA SP-463.

  • Wolff, S. C. and Hagen, W.: 1976,Publ. Astron. Soc. Pacific 88, 119.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Dipartimento di Astronomia, Università degli Studi, Trieste, Italy

    R. Faraggiana

Authors
  1. R. Faraggiana
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Faraggiana, R. Recent progress in CP star detection and classification. Astrophys Space Sci 134, 381–403 (1987). https://doi.org/10.1007/BF01094943

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01094943

Keywords

Search

Navigation