Publication: Barium and iron abundances in red giants
Loading...
Official URL
Full text at PDC
Publication Date
1990-06
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing ltd
Citations
Exportar
Abstract
An intermediate-dispersion abundance analysis has been carried out on a sample of 21 barium and 14 comparison stars. The excess of barium over iron has been used as the most representative indicator of peculiarity. These excesses are higher in the peculiar stars than in the nonpeculiar stars. Particularly interesting is the case of HD 67447, included in the comparison stars, with an excess Ba/Fe abundance = 1.61, probably a new barium star. A trend indicating a possible anticorrelation between barium overabundance and metallicity favors the suggestion that the "barium strong" group is older than the "barium weak" one.
Description
© 1990 American Astronomical Society.
© 1990 IOP Publishing.
UCM subjects
Unesco subjects
Keywords
Citation
Bidelman, W. P., and Keenan, P. C. (195l). Astrophys. J. 114, 473.
Böhm-Vitense, E. ( 1981 ). Annu. Rev. Astron. Astrophys. 19, 314.
Böhm-Vitense, E., Nemec, J., and Proffitt, C. (1984). Astrophys. J. 278, 726.
Catchpole, R. M., Robertson , B. S. C., and Warren , P. R. (1977). Mon. Not. R. Astron. Soc. 181, 391.
Cornide, M., and Rego, M. ( 1985). Astrophys. Space Sci. 105, 55.
Cowley, C. R. (1968). Astrophys. J. 153, 169.
Griffin, R. F. (1968). A Photometric Atlas of the Spectrum of Arcturus (Cambridge Philosophical Society, Cambridge, England).
Gustafsson , B. (1984). Private communication.
Gurtovenko, E. A., and Kostik, R. I. (1982). Astron. Astrophys. Suppl. 47, 193.
Hoffleit, D., and Jaschek, C. (1982). Catalogue of Bright Stars (Yale University, New Haven).
Janes, K. A., and McClure, R. D. (1975). Dudley Obs. Rep. 9, 99.
Janes, K. A. (1977). Publ. Astron . Soc. Pac. 89, 576.
Johnson, H. L. (1966). Annu . Rev. Astron . Astrophys. 4, 193.
Johnson , H. L. ( 1968). in Stars and Stellar Systems, edited by B. M. Middlehurst and L. H. Aller (University of Chicago, Chicago), Vol. VII, p. 167.
Keenan, P. C. (l983). Centre de Donnés Stellaires Bull. 24, l9.
Keenan, P. C. (1984). News. Chem. Peculiar Late-Type Stars 1, 5.
Keenan , P. C. (l985). CDS Bull. 29, 25.
Kovacs, N. (1983). Astron. Astrophys. 124, 63.
Kovacs, N. (1985). Astron. Astrophys. 150, 232.
Kurucz, R. L. (1979). Astrophys. J . Suppl. 40, 1.
Lü, P. K., Dawson, D. W., Upgren, A. R., and Weis, E. W. (1983). Astrophys. J. Suppl. 52, 169.
Lü, P. K., and Sawyer, D. (1979). Astrophys. J. 231, 144. McClure, R. D. (1976). Astron. J. 81, 182.
McClure, R. D., and Forrester, W. T. (1981). Publ. Dominion Astrophys. Obs. XV, No. 14.
McClure, R. D. (1983). Astrophys. J. 268, 264.
McClure, R. D. (1984). Publ. Astron. Soc. Pac. 96, 117.
McConnell, D. J., Frye, R. L., and Upgren, A. R. (1972). Astron. J. 77, 384.
Moore, C. E., Minnaert, M. G. J., and Houtgast, J. (1966). The Solar Spectrum 293S A 108770A, NBS Monograph No. 61 (U. S. Government Printing Office, Washington, DC).
Morel, M., Bentolila, C., Cayrel, G., and Hauck, B. (1976). In Abundance Effects in Classification, IAU Symposium No. 72, edited by B. Hauck and P. C. Keenan (Reidel, Dordrecht).
Pilachowski, C. A. (1977). Astron. Astrophys. 54, 465.
Ridgway, S. T., Joyce, R. R., White, N. M., and Wing, R. F. (1980). Astrophys. J. 235, 126.
Savage, B. D., and Mathis, J. S. (1979). Annu. Rev. Astron. Astrophys. 17, 73.
Tech, J. L. (1971 ). A High-Dispersion Spectral Analysis of the Ba II Star HD 20407S, NBS Monograph No. 119, (NBS, Washington, DC).
Tomkin, J., and Lambert, D. L. (1983). Astrophys. J 273, 722.
Warner, B. (1965). Mon. Not. R. Astron. Soc. 129, 263.
Williams, P. M. (1975). Mon. Not. R. Astron. Soc. 170, 343.