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The Metal-Rich RR Lyraes: Their Origin and Bearing on the Age and Helium Abundance of the Galactic Disk

Published online by Cambridge University Press:  12 April 2016

Robert P. Kraft
Robert P. Kraft*
Affiliation:
Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz 95064

Abstract

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We consider further the question of the origin and evolution of metal-rich RR Lyraes (MR-RR’s) in the solar vicinity, continuing the discussion begun by Taam, et al (1976) who showed that MR-RR’s descend from red giants of Eggen’s old disk population. If an old disk giant (ODG) is similar to a giant in a galactic cluster like NGC 188, then it must lose~0.5 M⊙ if it is to pump the HR-RR domain; thus the probability that an ODG will metamorphose into an RR Lyrae is about 1/200th the probability that its metal-poor (halo) counterpart will do so, else the sky would be full of bright MR-RR’s.

Type
Part III: Evolved Stars
Information
International Astronomical Union Colloquium , Volume 42: The Interaction of Variable Stars with their Environment , 1977 , pp. 521 - 558
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

References

Arp, H. 1965 in “Stars and Stellar Systems”, Vol. V (ed. Blaauw, A. and Schmidt, M.), (Chicago: Univ. of Chicago Press), p. 401.Google Scholar
Arp, H. and Hartwlck, D. 1971, Ap.J., 167, 499.CrossRefGoogle Scholar
Barker, T. 1978, Ap.J., (1n press).Google Scholar
Bell, R., Eriksson, K., Gustafsson, B., and Nordlund, A. 1976, A.A. Supplements, 23, 37.Google Scholar
Butler, D. 1975a, Ap.J., 200, 68.CrossRefGoogle Scholar
Butler, D. 1975b, Pub. A.S.P., 87, 559.CrossRefGoogle Scholar
Butler, D., Bell, R., Dickens, R., and Epps, E., 1978 (preprint).Google Scholar
Carbon, D., Langer, G. E., Butler, D., Kraft, R., Nocar, J., Kemper, E. 1978 (in preparation).Google Scholar
Christy, R. 1966, Ap.J., 144, 108.CrossRefGoogle Scholar
Cohen, J. 1975, Bull. A.A.S., 7, 446.Google Scholar
Demarque, P., and McClure, R. 1977a, Ap.J., 213, 716.CrossRefGoogle Scholar
Demarque, P., and McClure, R. 1977b, in Yale Conference on “Stellar Populations in Galaxies”, p. 199.Google Scholar
Dickens, R. 1970, Ap.J. Suppl., 22, 249.CrossRefGoogle Scholar
Eggen, O. 1973a, Pub. A.S.P., 85, 542.CrossRefGoogle Scholar
Eggen, O. 1973b, Ap.J., 182, 821.CrossRefGoogle Scholar
Faulkner, J. 1966, Ap.J., 144, 978.CrossRefGoogle Scholar
Fusi-Pecci, F., and Renzini, A. 1975, Astron. & Ap., 39, 413.Google Scholar
Gross, P. 1973, M. N. R. A. S., 164, 65.CrossRefGoogle Scholar
Hartwick, D. 1968, Ap.J., 154, 475.CrossRefGoogle Scholar
Hartwick, D., and Hesser, J. 1974, Ap.J. Letters, 197, L129.CrossRefGoogle Scholar
Hawley, S., and Miller, J. S. 1978, Ap.J., (in press).Google Scholar
Hemenway, M. 1975, A.J., 80, 199.CrossRefGoogle Scholar
Hesser, J., Hartwick, D., McClure, R. 1976, Ap.J. Letters, 207, L113.CrossRefGoogle Scholar
Iben, I. 1971, Pub. A.S.P., 83, 697.CrossRefGoogle Scholar
Iben, I. 1974, Ann. Rev. Astron. & Ap., 12, 215.CrossRefGoogle Scholar
Johnson, H. L. 1966, Ann. Rev. Astron. & Ap.,4, 193.CrossRefGoogle Scholar
Kinman, T. 1959, M. N. R. A. S., 219, 157, 538 and 559.CrossRefGoogle Scholar
Langer, G. E. 1977, Ap.J. Letters, (in press).Google Scholar
McClure, R., Forrester, W., and Gibson, J. 1974, Ap.J., 189, 409.CrossRefGoogle Scholar
McClure, R., and Osborn, W. 1974, Ap.J., 189, 405.CrossRefGoogle Scholar
McDonald, L. 1976, Thesis, Univ. of Calif., Santa Cruz.Google Scholar
Miller, J. S. 1974, Ann. Rev. Astron. & Ap., 12, 331.CrossRefGoogle Scholar
Nisson, P. 1976, in I.A.U. Symposium No. 72, (ed. Hauck, B. and Keenan, P.), (Dordrecht: Reidel Pub. Co.), p. 81.Google Scholar
O’Dell, C., Peimbert, M., and Kinman, T. D. 1964, Ap.J., 140, 119.CrossRefGoogle Scholar
Oosterhoff, P. 1939, Observatory, 62, 104.Google Scholar
Philip, A. G. D. 1977, private communication.Google Scholar
Preston, G. 1959, Ap.J., 130, 507.CrossRefGoogle Scholar
Preston, G. 1961, Ap.J., 134, 633 and 651.CrossRefGoogle Scholar
Renzini, A. 1977, Lectures given at the 7th Advanced Course Saas-Fee (Switzerland), March 28 - April 2, on “Advanced Stages in Stellar Evolution”.Google Scholar
Rood, R. 1972, Ap.J., 177, 681.CrossRefGoogle Scholar
Rosino, L. 1966, Ap.J., 144, 903.CrossRefGoogle Scholar
Sandage, A. 1969, Ap.J., 157, 515.CrossRefGoogle Scholar
Sandage, A. 1970, Ap.J., 162, 841.CrossRefGoogle Scholar
Sandage, A., and Eggen, O. 1969, Ap.J., 158, 685.CrossRefGoogle Scholar
Sandage, A., and Hartwick, D. 1977, A.J., 82, 459.CrossRefGoogle Scholar
Sandage, A., and Katem, B. 1964, Ap.J., 139, 1088.CrossRefGoogle Scholar
Sandage, A., and Smith, L. 1966, Ap.J., 144, 886.CrossRefGoogle Scholar
Sandage, A., Smith, L., and Norton, R. 1966, Ap.J., 144, 894.CrossRefGoogle Scholar
Stellinwerf, R. 1975, Ap.J., 195, 441.CrossRefGoogle Scholar
Stepien, K. 1972, Acta Astronomica, 22, 175.Google Scholar
Sturch, C. 1967, Ap.J., 148, 477.CrossRefGoogle Scholar
Sweigart, A., and Gross, P. 1976, Ap.J. Suppl., 32, 367.Google Scholar
Sweigart, A., and Gross, P. 1977, preprint.Google Scholar
Taam, R., Kraft, R., and Suntzeff, N. 1976, Ap.J., 207, 201.CrossRefGoogle Scholar
Tinsley, B., and Gunn, J. 1976, Ap.J., 206, 525.CrossRefGoogle Scholar
Torres-Peimbert, S., and Peimbert, M. 1978, preprint.Google Scholar
van Albada, T., and Baker, N. 1973, Ap.J., 185, 477.CrossRefGoogle Scholar
van den Bergh, S. 1969, Ap.J. Suppl., 19, 145.CrossRefGoogle Scholar
Wilson, O. 1976, Ap.J., 205, 823.CrossRefGoogle Scholar
Woolley, R., Harding, G., Cassells, A., and Saunders, J. 1965, Royal Obs. Bull., No. 97.Google Scholar