Advertisement

Astrophysics and Space Science

, Volume 77, Issue 1, pp 23–40 | Cite as

The age determination of young clusters in the large magellanic cloud by means of integrated photometry

  • G. Barbaro
Article

Abstract

The relationt=t(Q), obtained from theoretical integrated colours (B-V)0 and (U-B)0 for Pop. I clusters, has been employed to date a group of 13 young clusters in the LMC. The comparison with the ages derived by the t.o.p. method shows that the theoretical integrated colour indices of clusters, with evolved stars in the mass range 5–15M, are systematically bluer than the observed ones.

The analysis performed indicate that, in order to reconcile observed and computed colours, the maximum effective temperature of evolved stars should be suitably lowered. The hypothesis has been advanced that such changes can be obtained by the inclusion of the mass loss in the computation of evolutionary tracks.

Keywords

Colour Mass Loss Mass Range Colour Index Effective Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Alcaino, G.: 1979,Vistas Astron. 23, 1.Google Scholar
  2. Alcock, C. and Paczynski, B.: 1978,Astrophys. J. 223, 244.Google Scholar
  3. Arp, H.: 1959,Astron. J. 64, 175, 254.Google Scholar
  4. Arp, H. and Thackeray, A. D.: 1967,Astrophys. J. 149, 73.Google Scholar
  5. Barbaro, G. and Bertelli, G.: 1977,Astron. Astrophys. 54, 243.Google Scholar
  6. Becker, S. A.; 1977, Ph.D. Thesis, University of Illinois.Google Scholar
  7. Bernard, A. and Bigay, J. H.; 1974,Astron. Astrophys. 33, 123.Google Scholar
  8. Bertelli, G., Chiosi, C., Nasi, E., and Greggio, L.: 1980, (preprint).Google Scholar
  9. Cassinelli, J. P.: 1979,Ann. Rev. Astron. Astrophys. 17, 275.Google Scholar
  10. Connolly, L. P. and Tifft, W. G.: 1977,Monthly Notices Roy. Astron. Soc. 180, 401.Google Scholar
  11. Dixon, M. E., Ford, V. L. and Robertson, J. W.: 1972,Astrophys. J. 174, 17.Google Scholar
  12. Efremov, Yu. N.: 1978,Sov. Astron. 22, 161.Google Scholar
  13. Flower, P. J. and Hodge, P. W.: 1975,Astrophys. J. 196, 369.Google Scholar
  14. Gray, D. F.: 1965,Astron. J. 70, 362.Google Scholar
  15. Harris, H. C. and Canterna, R.: 1977,Astron. J. 82, 798.Google Scholar
  16. Harris, G. L. and Deupree, R. G.: 1976,Astrophys. J. 209, 402.Google Scholar
  17. Johnson, H. L.: 1966,Ann. Rev. Astron. Astrophys. 4, 193.Google Scholar
  18. Lauterborn, D., Refsdal, S., and Weigert, A.: 1971,Astron. Astrophys. 10, 97.Google Scholar
  19. Morton, D. C.: 1969,Astrophys. J. 158, 629.Google Scholar
  20. Morton, D. C. and Adams, T. F.: 1968,Astrophys. J. 151, 611.Google Scholar
  21. Racine, R.: 1973,Astron. J. 78, 180.Google Scholar
  22. Robertson, J. W.: 1972,Astrophys. J. 177, 473.Google Scholar
  23. Robertson, J. W.: 1973a,Astrophys. J. 180, 425.Google Scholar
  24. Robertson, J. W.: 1973b,Astrophys. J. 185, 817.Google Scholar
  25. Robertson, J. W.: 1974a,Astrophys. J. 191, 67.Google Scholar
  26. Robertson, J. W.: 1974b,Astron. Astrophys. Suppl. 15, 261.Google Scholar
  27. Searle, L., Sargent, W. L. W., and Bagnuolo, W. G. 1973,Astrophys. J. 179, 427.Google Scholar
  28. Straizys, V. and Sviderskiene, Z.: 1977,Soviet Astron. 21, 162.Google Scholar
  29. Tifft, W. G. and Connolly, L. P. 1973,Monthly Notices Roy. Astron. Soc. 163, 93.Google Scholar
  30. van den Bergh, S.: 1967,Astron. J. 72, 70.Google Scholar
  31. van den Bergh, S.: 1975,Ann. Rev. Astron. Astrophys. 13, 217.Google Scholar
  32. van den Bergh, S. and Hagen, G. L.: 1968,Astron. J. 73, 569.Google Scholar

Copyright information

© D. Reidel Publishing Company 1981

Authors and Affiliations

  • G. Barbaro
    • 1
  1. 1.Istituto di AstronomiaUniversità di PadovaItalia

Personalised recommendations