Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T03:27:08.442Z Has data issue: false hasContentIssue false
  • English
  • Français

Be vs. Li Abundance in Li-Rich Giants: an Evidence of Li Production in Red Giants

Published online by Cambridge University Press:  25 May 2016

B. V. Castilho
B. V. Castilho*
Affiliation:
Departamento de Astronomia, Instituto Astronômico e Geofísico, Universidade de São Paulo, CP 3386, 01060-970, Brazil

Abstract

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.

We present Be abundances derived through spectral synthesis for two Li-rich giants and a Li-normal giant, plus α Cen A and B, based on observations of the Be II λ 3130.420 and 3131.066 Å lines obtained with the CASPEC spectrograph at the ESO 3.6m telescope.

The values derived for the two Li-rich giants (HD146850, HD787) agree with the one for the Li-normal giant (HD220321), and shows that Be was depleted in these stars (by > 90% i.e. by a factor of 10 or larger from the initial Pop I value (logN(Be)= 1.4)).

This result implies that the original Li in these stars was almost completely destroyed, and that Li is most probably produced in red giants.

Type
4. Lithium Abundances
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 331 - 337
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

Bond, H. E. 1980, ApJS, 44, 517 Google Scholar
Brown, J. A., Sneden, C., Lambert, D. L., & Dutchover, E. 1989, ApJS, 71, 293 Google Scholar
Castilho, B. V., Gregorio-Hetem, J., & Barbuy, B. 1995, A&A, 297, 503 Google Scholar
Castilho, B. V., Spite, F., Barbuy, B., Spite, M., & De Medeiros, J.R., Gregorio-Hetem, J. 1999, A&A, 345, 249 Google Scholar
Chmielewski, Y., Friel, E., Cayrel de Strobel, G., & Bentolila, C. 1992, A&A, 263, 219 Google Scholar
de la Reza, R., & da Silva, L. 1995, ApJ, 439, 917 Google Scholar
Edvardsson, B., Andersen, J., Gustafsson, B. et al. 1993, A&A, 275, 101 Google Scholar
Girardi, L., Bressan, A., Bertelli, G., & Chiosi, C. 2000, A&AS in press Google Scholar
Grevesse, N., Noels, A., & Sauval, J. 1996, in ASP Conf. Ser. 99, eds. Holt, S.S., Sonneborn, G., p. 117 Google Scholar
Gustafsson, B., Bell, R. A., Eriksson, K., & Nordlund, A. 1975, A&A, 42, 407 Google Scholar
King, J., Deliyannis, C. P., Hiltgen, D. D., Stephens, A., Cunha, K., & Boesgaard, A. M. 1997b, AJ, 113, 1871 Google Scholar
Kurucz, R. L. 1992, in IAU Symp. 149, eds. Barbuy, B., Renzini, A., Kluwer Acad. Press, p. 225 Google Scholar
Lejeune, T., Cuisinier, F., & Buser, R. 1998, A&AS, 130, 65 Google Scholar
Moore, C. E., Minnaert, M. G., & Houtgast, J. 1966, The Solar Spectrum from 2935 to 8870 Å, Second Revision of Rowland's Preliminary Table of Solar Spectrum Wavelengths, N.B.S. Monog. 61 (Washington, D.C.: Government Printing Office)Google Scholar
Nave, G., Johansson, S., Learner, R. C. M., Thorne, A. P., & Brault, T. J. 1994, ApJS, 94, 221 Google Scholar
Primas, F., Duncan, D. K., Pinsonneault, M. H., Deliyannis, C. P., & Thorburn, J. A. 1997, ApJ, 480, 784 Google Scholar
Sackmann, I.-J., & Boothroyd, A. I. 1999, ApJ, 510, 217 Google Scholar