Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-05-10T06:40:53.928Z Has data issue: false hasContentIssue false
  • English
  • Français

Do Halo Field Stars and Globular Clusters Belong to the Same Population?

Published online by Cambridge University Press:  30 March 2016

Robert P. Kraft
Robert P. Kraft*
Affiliation:
Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Obviously such transcendental issues as the helium content and age of the oldest stars depend on whether we are correct in our belief that the answer to this question is “yes” I hardly need say that over the past 40 years compelling affirmative arguments have been developed. Thus, for example, the solar motion of the common subdwarfs can be shown (e.g., Carney 1979) to be essentially identical with that of globular clusters (Kinman 1959) (Table 1), and the Fe-peak metallicities of giants and RR Lyraes in the halo field have been shown to be the same as those in clusters [see, e.g., recent reviews by Kraft (1979) and Freeman and Norris (1981)]. It is hard to believe that we would be incorrect in identifying the main sequence of a globular cluster with the main sequence defined by the trigonometric parallaxes, magnitudes and colors of subdwarfs having the same [Fe/H]. It might seem, therefore, that raising such an issue at this late date is equivalent to discussing a non-existent problem.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 6 , 1983 , pp. 129 - 137
Copyright
Copyright © Reidel 1983

References

Bond, H.E.: 1980, Ap. J. Supplements 44, p. 517.CrossRefGoogle Scholar
Butler, D., Dickens, R.J. and Epps, E.: 1978, Ap. J. 225, p. 148.Google Scholar
Carbon, D.F., Butler, D., Kraft, R.P. and Nocar, J.: 1977, in “CNO Isotopes in Astrophysics,” ed. Andouze, J., p. 33 (Dordrecht: Reidel).CrossRefGoogle Scholar
Carbon, D.F., Langer, G. E., Butler, D., Kraft, R.P., Ch. F., Trefzger, Suntzeff, N.B., Kemper, E. and Romanishin, W.: 1932, Ap. J. Supplements 49, p. 207.CrossRefGoogle Scholar
Carney, B.: 1979, Ap. J. 233, p. 877.Google Scholar
Carney, B.: 1982, invited paper read at Joint Discussion III of the IAU, Patras, Greece.Google Scholar
Cohen, J.G. and Frogel, J.: 1982, Ap. J. Letters 255, p. L39.Google Scholar
Fall, S. and Rees, M.: 1977, M. N.R.A.S. 181, p. 37P.Google Scholar
Faulkner, J.: 1966, Ap. J. 144, p. 978.Google Scholar
Freeman, K.C. and Norris, J.: 1981, Ann. Rev. Astron. Ap. 19, p. 319.Google Scholar
Freeman, K.C. and Rodgers, A.W.: 1977, Ap. J. Letters 201, p. L71.Google Scholar
Friel, E., Kraft, R.P., Suntzeff, N.B. and Carbon, D.F.: 1983, Publ. Astron. Soc. Pac. (in press).Google Scholar
Hartwick, F. and McClure, R.: 1972, Ap. J. Letters 176, p. L57.Google Scholar
Hesser, J. : 1932, private communication.Google Scholar
Hesser, J., Hartwick, F. and McClure, R.: 1976, Ap. J. Letters 207, p. L113.CrossRefGoogle Scholar
Iben, I.: 1974, Ann. Rev. Astron. AD. 12, p. 215.CrossRefGoogle Scholar
Kinman, T.D.: 1959, M. N.R.A.S. 119, p. 499, p. 538.Google Scholar
Kraft, R.P.: 1979, Ann. Rev. Astron. Ap. 17, p. 309.Google Scholar
Kraft, R.P., Suntzeff, N.B., Langer, G.E., Carbon, D.F., Trefzger, Ch. F., Friel, E. and Stone, R.P.S.: 1982, Publ. Astron. Soc. Pac. 94, p. 55.Google Scholar
Madore, B.: 1980, in “Globular Clusters,” (Cambridge: Cambridge Univ. Press), p. 21.Google Scholar
Norris, J.: 1981, Ap. J. 248, p. 177.Google Scholar
Norris, J. and Smith, G.H.: 1982, in “Astrophysical Parameters for Globular Clusters,” IAU Colloq. No. 68, p. 109.Google Scholar
Oosterhoff, P.T.: 1939, Observatory 72, p. 104.Google Scholar
Peterson, C.J.: 1974, Ap. J. Letters 190, p. L17.Google Scholar
Pilachowski, C., Wallerstein, G. and Leep, E.: 1980, Ap. J. 236, p. 508.Google Scholar
Renzini, A.: 1977, in “Advanced Stages of Stellar Evolution,” ed. Bouvier, P. and Maeder, A. (Geneva), p. 149.Google Scholar
Renzini, A. and Voli, M.. 1981, Astron. Ap. 94, p. 175.Google Scholar
Searle, L. and Zinn, R.: 1978, Ap. J. 225, p. 357.CrossRefGoogle Scholar
C., Sneden: 1974, Ap. J. 189, p. 493.Google Scholar
Suntzeff, N.B.: 1981, Ap. J. Supplements 47, p. 1.Google Scholar
Suntzeff, N.B. : 1982, private communication.Google Scholar
Sweigart, A. and Mengel, J.G.: 1979, Ap. J. 229, p. 624.Google Scholar
Trefzger, Ch. F., Carbon, D.F., Langer, G.E., Suntzeff, N.B. and Kraft, R.P.: 1983, Ap. J. (in press).Google Scholar
van den Bergh, S.: 1967, Publ. Astron. Soc. Pac. 79. p. 460.Google Scholar