Skip to main content Accessibility help
×
Home

Precise Li abundances in metal-poor stars: depletion in the Spite plateau

  • J. Meléndez (a1), L. Casagrande (a2), I. Ramírez (a2) and M. Asplund (a2)

Abstract

We present Li abundances for 73 stars in the metallicity range −3.5 < [Fe/H] < −1.0 using improved IRFM temperatures (Casagrande et al. 2009) with precise E(B-V) values obtained mostly from interstellar NaI D lines, and high-quality equivalent widths (σEW ~ 3%). At all metallicities we uncover a fine-structure in the Li abundances of Spite plateau stars, which we trace to Li depletion that depends on both metallicity and mass. Models including atomic diffusion and turbulent mixing seem to reproduce the observed Li depletion assuming a primordial Li abundance ALi = 2.64 dex (MARCS models) or 2.72 (Kurucz overshooting models), in good agreement with current predictions (ALi = 2.72) from standard BBN.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Precise Li abundances in metal-poor stars: depletion in the Spite plateau
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Precise Li abundances in metal-poor stars: depletion in the Spite plateau
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Precise Li abundances in metal-poor stars: depletion in the Spite plateau
      Available formats
      ×

Copyright

References

Hide All
Asplund, M., Lambert, D. L., Nissen, P. E., Primas, F., & Smith, V. V. 2006, ApJ, 644, 229
Asplund, M. & Meléndez, J. 2008, First Stars III, 990, 342
Bonifacio, P., et al. 2007, A&A, 462, 851
Casagrande, L., Ramírez, I., Meléndez, J., Bessell, M., & Asplund, M. 2009, A&A, submitted
Charbonnel, C. & Primas, F. 2005, A&A, 442, 961
Cyburt, R. H., Fields, B. D., & Olive, K. A. 2008, J. Cosmology & Astro-Particle Phys., 11, 12
Gustafsson, B., Edvardsson, B., Eriksson, K. et al. 2008, A&A, 486, 951
Meléndez, J. & Ramírez, I. 2004, ApJ (Letters), 615, L33
Meléndez, J., Casagrande, L., Ramírez, I., & Asplund, M. 2009, A&A, submitted
Richard, O., Michaud, G., & Richer, J. 2005, ApJ, 619, 538
Spite, F. & Spite, M. 1982, A&A, 115, 357
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Related content

Powered by UNSILO

Precise Li abundances in metal-poor stars: depletion in the Spite plateau

  • J. Meléndez (a1), L. Casagrande (a2), I. Ramírez (a2) and M. Asplund (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.