Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-07T16:10:25.332Z Has data issue: false hasContentIssue false
  • English
  • Français

Li Enrichment, Mass Loss, and CN Abundances in High Rotating K Giants

Published online by Cambridge University Press:  26 May 2016

N. A. Drake ,
R. de la Reza ,
L. da Silva  and
D. L. Lambert
N. A. Drake
Affiliation:
Observatório Nacional/MCT, Rua General José Cristino 77, 20921-400, Rio de Janeiro, Brazil
R. de la Reza
Affiliation:
Observatório Nacional/MCT, Rua General José Cristino 77, 20921-400, Rio de Janeiro, Brazil
L. da Silva
Affiliation:
Observatório Nacional/MCT, Rua General José Cristino 77, 20921-400, Rio de Janeiro, Brazil
D. L. Lambert
Affiliation:
Department of Astronomy, University of Texas at Austin, Austin, TX 78712 USA

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.

High rotating low-mass K giants can be considered as interesting new “laboratories” for studies of the mixing process and mass loss. By means of high spectral resolution observations of some rapidly rotating K giants we found a series of connections between rotation, stellar activity, high Li abundance and mass loss. These giants show low 14N and high 13C enrichment. Nearly half of them are Li rich. This frequency is much higher than the ~ 2% corresponding to common, low rotating K giants. They are also the most suitable objects to test new models of rotation-induced mixing or planet engulfing scenarios.

Type
Session 2 Rotation in Relation with Abundances and Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004 , pp. 242 - 243
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Balachandran, S.C., Fekel, F.C., Henry, G.W., & Uitenbroek, H. 2000, ApJ 542, 978 Google Scholar
Berdyugina, S.V., & Savanov, I.S. 1994, Astron. Lett. 20, 639 Google Scholar
Charbonnel, C., & Balachandran, S.C. 2000, A&A 359, 563 Google Scholar
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, L77 Google Scholar
Denissenkov, P.A., & Weiss, A. 2000, A&A 358, L49 Google Scholar
Drake, N.A., de la Reza, R., da Silva, L., & Lambert, D.L. 2002, AJ 123, 2703 CrossRefGoogle Scholar
Palacios, A., Charbonnel, C., & Forestini, M. 2001, A&A 375, L9 Google Scholar
Reddy, B. E., Lambert, D.L., Hrivnak, B. J., & Bakker, E. J. 2002, AJ 123, 1993 Google Scholar
Siess, L., & Livio, M. 1999, MNRAS 308, 1133 Google Scholar