Skip to main content
SpringerLink
Log in

The spectrum of the Cr star epsilon ursae majoris

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

Abstract

Fourteen coudé spectrograms (eight with dispersion 12.4 Å mm−1 and six 7 Å mm−1) of the Cr star ∈UMa (Ap) have been studied. The observations were made at the Haute Provence Observatory. The radial velocities of the various ions have been measured. The existence of Balmer progression in radial velocity is doubtful. The variability of some lines is in the opposite sense of K of Caii. Both a rough and a fine analysis have been made. The results of these analyses are compared and found to be in good agreement. The results of the fine analysis indicate a defect of Al, Si and Ca; Sc, Ti, Fe and Sr are normal, Mg and Ni are in slight excess. V, Cr and Mn are in excess by factors of 3, 12, 19; Y, Zr and Ba are in excess by factors of 9, 15, 30. Rare earths are in excess by factors ranging between 100–1000. These results are compared with the majority of the Cr−Eu−Sr stars.

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

  • Aller, M. F. and Everett, C. H. M.: 1972,Astrophys. J. 172, 447.

    Google Scholar 

  • Baschek, B., Holweger, H., and Traving, G.: 1966,Abh. Hamburger Sternw,8, No. 1.

  • Bertaud, C.: 1959,J. Obs. 42, 45.

    Google Scholar 

  • Bridges, J. M. and Wiese, W. L. 1970,Astrophys. J. 161, L71.

    Google Scholar 

  • Burger, M.: 1974, The Astronomical Institute at Utrecht, Internal Report ROF72, p. C.6.1.

  • Carbon, D. F. and Gingerich, O.: 1969, ‘Theory and Observation of Normal Stellar Atmospheres’, in O. Gingerich (ed.),Proceedings of the Third Harvard Smithsonian Conference on Stellar Atmospheres.

  • Corliss, C. H. and Warner, B.: 1964,Astrophys. J. Suppl. 8, 395.

    Google Scholar 

  • Cowley, A., Cowley, C., Jaschek, M., and Jaschek, C.: 1969,Astron. J. 74, 375.

    Google Scholar 

  • Deutsch, A.: 1947,Astrophys. J. 105, 296.

    Google Scholar 

  • Eggen, O. J.: 1967, R. C. Cameron (ed.),Colors, Luminosities and Motions of the Peculiar A-Type Stars. The Magnetic and Related Stars p. 141.

  • Engin, S.: 1974,Astron. Astrophys. Suppl. 16 237.

    Google Scholar 

  • Engin, S.: 1975, ‘Physics of Ap-Stars’IAU Colloq. 32, 623.

    Google Scholar 

  • Garz, T., Holweger, H., Kock, M., and Richter, J.: 1969,Astron. Astrophys. 2, 446.

    Google Scholar 

  • Grevesse, N. and Blanquet G.: 1969,Solar Phys. 8, 5.

    Google Scholar 

  • Griem, H. R.: 1960,Astrophys. J. 132 883.

    Google Scholar 

  • Griem, H. R.: 1962,Astrophys. J. 136, 422.

    Google Scholar 

  • Guthnick, P.: 1931,Sitz. Preuss. Akad. Wiss. Berlin, Nr. 27.

  • Hack, M. and Casati, B.: 1957,Mem. Soc. Astron. Italy. 28, 53.

    Google Scholar 

  • Hack, M. and Struve, O.: 1969,Stellar Spectroscopy, Normal Stars, Osservatorio Astronomico di Trieste, p. 174.

  • Hoffleit, D.: 1964,Catalogue of Bright Stars (2nd ed.), Yale Univ. Observatory.

  • Inglish, D. R. and Teller, E.: 1939,Astrophys. J. 90, 439.

    Google Scholar 

  • Klinglesmith, D. A.: 1971, ‘Hydrogen Line Blanketed Model Stellar Atmospheres’, NASA SP-3065.

  • Kurucz, R. L.: 1970, Smithsonian Astrophysical Obs. Special Report, No. 309.

  • Mihalas, D. M.: 1965,Astrophys. J. Suppl. 9, 321.

    Google Scholar 

  • Molnar, M. R.: 1975,Astron. J. 80, 137.

    Google Scholar 

  • Molnar, M. R. and Mallama, A. D.: 1977,Astrophys. J. Suppl. 33, 1.

    Google Scholar 

  • Moore, C. E.: 1965, ‘A Multiplet Table of Astrophysical Interest’, Contr. Princeton University Observatory, No. 20.

  • Muller, E. A.: 1968, in L. H. Ahrens (ed.),Origin and Distribution of the Elements, Pergamon Press.

  • Osawa, K.: 1965,Ann. Tokyo Astron. Obs. 2nd. Ser.9, 123.

    Google Scholar 

  • Peytremann, E., Baschek, B., Holweger, H., and Traving, G.: 1967,Un programme d'analyse quantitative de spectres stellaires, Obs. Genéve.

  • Slettebak, A.: 1954,Astrophys. J. 119, 146.

    Google Scholar 

  • Swensson, J. W.: 1944,Astrophys. J. 99, 258.

    Google Scholar 

  • Warner, B.: 1967,Mem. Roy. Astron. Soc. 70, 165.

    Google Scholar 

  • Wolnik, S. J., Berthel, R. O., and Wares, G. W.: 1970,Astrophys. J. 162, 1037.

    Google Scholar 

  • Wolnik, S. J., Berthel, R. O., and Wares, G. W.: 1971,Astrophys. J. 166, L31.

    Google Scholar 

  • Wood, H. J.: 1964,Publ. Astron. Soc. Pacific 76, 158.

    Google Scholar 

  • Wright, K. O.: 1951,Publ. Dominion Astrophys. Obs. Victoria 8, 1.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Astronomical Department of Istanbul University, Turkey

    H. Gökmen Tektunali

  2. Astronomical Observatory of Trieste, Italy

    H. Gökmen Tektunali

Authors
  1. H. Gökmen Tektunali
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

The observations have been made at the 152 cm coudé telescope of the Haute Provence Observatory.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tektunali, H.G. The spectrum of the Cr star epsilon ursae majoris. Astrophys Space Sci 77, 41–58 (1981). https://doi.org/10.1007/BF00648756

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00648756

Keywords

Search

Navigation