Advertisement

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

Possibility of mass loss in the red-giant stage from H-R diagrams of galactic clusters

Abstract

A statistical research on evolved stars beyond hydrogen exhaustion is performed by comparing the H-R diagrams of about 60 open clusters with a set of isochronous curves without mass loss derived from Iben's evolutionary tracks and time scales for Population I stars. Interpreting the difference in magnitude between the theoretical positions thus calculated and the observed ones as due to mass loss, when negative, the results indicate that this loss may be conspicuous only for very massive and red stars. However, a comparison with an analogous work of Lindoff reveals that the uncertainties connected with the bolometric and colour corrections may invalidate by a large amount the conclusions which might be drawn from such research.

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

References

  1. Adams, T. F. andMorton, D. C.: 1968,Astrophys. J. 152, 195.

  2. Allen, C. W.: 1963,Astrophysical Quantities, The Athlone Press, London.

  3. Barbaro, G. andFabris, G.: 1968,Pubbl. dell'Oss. di Padova, No. 146.

  4. Barbaro, G., Dallaporta, N. andNobili, L.: 1967,Pubbl. dell'Oss. di Padova, No. 138.

  5. Harris, D. L. III: 1963,Basic Astronomical Data, Chicago University Press, Chicago, p. 263.

  6. Hofmeister, F., Kippenhahn, R., andWeigert, A.: 1964a,Z. Astrophys. 59, 242.

  7. Hofmeister, F., Kippenhahn, R., andWeigert, A.: 1964b,Z. Astrophys. 60, 57.

  8. Iben, I.: 1965,Astrophys. J. 142, 1447.

  9. Iben, I.: 1966,Astrophys. J. 143, 483, 516.

  10. Iben, I.: 1967,Astrophys. J. 147, 650.

  11. Johnson, H. L.: 1966,Ann. Rev. Astron. Astrophys. 4, 193.

  12. Kippenhahn, R., Thomas, H. C., andWeigert, A.: 1964,Z. Astrophys. 60, 571.

  13. Lindoff, U.: 1968,Arkiv Astron. 5, 1;5, 2.

  14. Schild, R.: 1967,Astrophys. J. 148, 449.

  15. Smak, J.: 1964,Astrophys. J. Suppl. 9, 141.

  16. Smak, J.: 1966a,Acta Astron. 16, 1.

  17. Smak, J.: 1966b,Ann. Rev. Astron. Astrophys. 4, 21.

  18. Stothers, R.: 1963,Astrophys. J. 138, 1074.

  19. Stothers, R.: 1964,Astrophys. J. 140, 510.

  20. Stothers, R.: 1966,Astrophys. J. 143, 91.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Barbaro, G., Dallaporta, N. & Fabris, G. Possibility of mass loss in the red-giant stage from H-R diagrams of galactic clusters. Astrophys Space Sci 3, 123–138 (1969). https://doi.org/10.1007/BF00649599

Download citation

Keywords

  • Hydrogen
  • Colour
  • Mass Loss
  • Statistical Research
  • Open Cluster