Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Analysis of spectra of α CMi and α Cen A observed with the orbiting stellar ultraviolet spectrophotometer S59 in ESRO's TD1A satellite

  • 33 Accesses

Abstract

Ultraviolet spectra of α CMi and α Cen A taken with moderate spectral resolution (approx. 1.8 Å) are used to analyse whether a determination of stellar chemical abundances of Fe and Cr and of the photospheric parameters is possible. For αCMi, for which good spectral data are available, we findT eff=7660±110 K; logg eff=3.05±0.1. Further, Δlogɛ(Fe)=−0.06±0.09; Δ log ɛ(Cr)=−0.01±0.09 with regard to ‘standard’ (solar) abundances. For α Cen A the resulting data — particularly the photospheric ones — are less certain, but it seems that the Fe abundance may be smaller than the ‘standard’ value.

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

References

  1. Burger, M.: 1976,Study of the Near Ultraviolet Spectra of B-type Stars, Thesis, Vrije Universiteit, Brussels.

  2. Burger, M. and Van der Hucht, K. A.: 1976,Astron. Astrophys. 48, 173.

  3. Dravins, D. and Hultqvist, L.: 1977,Astron. Astrophys. 55, 463.

  4. de Jager, C., Hoekstra, R., Van der Hucht, K. A., Kamperman, T. M., Lamers, H. J., Hammerschlag, A., Werner, W. and Emming, J. G.: 1974,Astrophys. Space Sci. 26, 207.

  5. de Jager, C. and Neven, L.: 1967,Bull. Astron. Inst. Neth., Suppl.Series 2, No. 4.

  6. de Jager, C. and Neven, L.: 1975,Astrophys. Space Sci. 33, 295.

  7. Peytremann, E.: 1974,Astron. Astrophys. Suppl. 18, 81.

  8. Van der Hucht, K. A., Lamers, H. J. G. L. M., Faraggiana, R., Hack, M. and Stalio, R.: 1976,Astron. Astrophys. Suppl. 25, 65.

  9. Withbroe, G. L.: 1971, inThe Menzel Symposium on Solar Physics, Atomic Spectra and Gaseous Nebulae, NBS Special Publ. No. 353.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

de Jager, C., Kamperman, T.M. & Neven, L. Analysis of spectra of α CMi and α Cen A observed with the orbiting stellar ultraviolet spectrophotometer S59 in ESRO's TD1A satellite. Astrophys Space Sci 54, 343–353 (1978). https://doi.org/10.1007/BF00639439

Download citation

Keywords

  • Spectral Data
  • Spectral Resolution
  • Ultraviolet Spectrum
  • Chemical Abundance
  • Ultraviolet Spectrophotometer