Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-24T09:12:34.551Z Has data issue: false hasContentIssue false
  • English
  • Français

The Properties of the PDS Li-rich Giant Stars

Published online by Cambridge University Press:  25 May 2016

C. A. O. Torres ,
G. R. Quast ,
R. de la Reza  and
L. da Silva
C. A. O. Torres
Affiliation:
Laboratório Nacional de Astrofísica/MCT, CP 21, 37504-360 Itajubá, MG, Brazil
G. R. Quast
Affiliation:
Laboratório Nacional de Astrofísica/MCT, CP 21, 37504-360 Itajubá, MG, Brazil
R. de la Reza
Affiliation:
Observatório Nacional/MCT, Rua General José Cristino 77, 20921-030, Rio de Janeiro, Brazil
L. da Silva
Affiliation:
Observatório Nacional/MCT, Rua General José Cristino 77, 20921-030, Rio de Janeiro, 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.

In the Pico dos Dias Survey (PDS), devised to search for young stellar objects, we found also K giants presenting moderate to strong Lithium lines associated with IRAS sources. But there are some gK with weak or absent Li lines too. There is a dichotomy in the distribution of the IRAS spectral indices between both kinds of K stars. A model of an expanding shell with a mass-dependent velocity may explain this behavior, if the photospheric Li depletion takes only ˜2500 yrs.

Type
4. Lithium Abundances
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 320 - 324
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

de la Reza, R., Drake, N. A., & da Silva, L. 1996, ApJ, 456, L115 Google Scholar
de la Reza, R., Drake, N. A., da Silva, L., Torres, C. A. O., & Martin, E. L. 1997, ApJ, 482, L80 Google Scholar
Fekel, F. C., Webb, R. A., White, R. J., & Zuckerman, B. 1996 ApJ 462, L95 Google Scholar
Gregorio-Hetem, J., Lépine, J. R. D., Quast, G. R., Torres, C. A. O., & de la Reza, R. 1992, AJ, 103, 549 Google Scholar
Hu, J. Y., Slijkhuis, S., De Jong, T., Jiang, B. W. 1993, A&AS, 100, 413 Google Scholar
Torres, C. A. O. 1998, Publicação Especial do Observatório Nacional, 10/99 Google Scholar
Wouterloot, J. G. A., Brand, J. 1989, A&AS, 80, 149 Google Scholar