Skip to main content Accessibility help
×
Home

Exploring the early Universe with extremely metal-poor stars

  • Terese T. Hansen (a1), Norbert Christlieb (a1), Camilla J. Hansen (a2) and Timothy C. Beers (a3)

Abstract

The earliest phases of Galactical chemical evolution and nucleosynthesis can be investigated by studying the old metal-poor stars. It has been recognized that a large fraction of metal-poor stars possess significant over-abundances of carbon relative to iron. Here we present the results of a 23-star homogeneously analyzed sample of metal-poor candidates from the Hamburg/ESO survey. We have derived abundances for a large number of elements ranging from Li to Pb. The sample includes four ultra metal-poor stars ([Fe/H] < −4.0), six CEMP-no stars, five CEMP-s stars, two CEMP-r stars and two CEMP-r/s stars. This broad variety of the sample stars gives us an unique opportunity to explore different abundance patterns at low metallicity.

    • 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.

      Exploring the early Universe with extremely metal-poor stars
      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.

      Exploring the early Universe with extremely metal-poor stars
      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.

      Exploring the early Universe with extremely metal-poor stars
      Available formats
      ×

Copyright

References

Hide All
Beers, T. C., & Christlieb, N. 2005, A&A, 43, 531
Bisterzo, S., Gallino, R., Straniero, O., Cristallo, S., & Käppeler, F. 2012, MNRAS, 422, 849
Bonifacio, P., Caffau, E., Spite, M., & et al., 2015, A&A, 579, A28
Chiappini, C., Ekström, S., Meynet, G., & et al., 2008, A&A, 479, L9
Hansen, T. T., Hansen, C. J., Christlieb, N., & et al., 2015a, ApJ, 807, 173
Hansen, T. T., Andersen, J., & Nordström, Bet al., 2015b, A&A, submitted
Herwig, F., 2005, ARAA, 43, 435
Hirschi, R., 2007, A&A, 461, 571
Lee, Y. S., Beers, T. C., Masseron, T., et al., 2013, AJ, 146, 132
Lucatello, S., Tsangarides, S., Beers, T. C., & et al., 2005, ApJ, 625, 825
Maeder, A., Meynet, G. & Chiappini, C., 2015, A&A, 576, A56
Masseron, T., Johnson, J. A., Plez, B., & et al., 2010, A&A, 509, A93
Meynet, G., Ekström, S. & Maeder, A., 2006, A&A, 447, 623
Norris, J. E., Yong, D., Bessell, M. S., & et al., 2013, ApJ, 762, 28
Spite, M., Caffau, E., Bonifacio, P., & et al., 2013, A&A, 552, A107
Umeda, H. & Nomoto, K. 2003, Nature, 422, 871
Yong, D., Norris, J. E., Bessell, M. S., & et al., 2013, ApJ, 762, 26
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Exploring the early Universe with extremely metal-poor stars

  • Terese T. Hansen (a1), Norbert Christlieb (a1), Camilla J. Hansen (a2) and Timothy C. Beers (a3)

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