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| Paper: |
CS 30322-023: An Ultra Metal-Poor TP-AGB Star? |
| Volume: |
378, Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes |
| Page: |
129 |
| Authors: |
Masseron, T.; Van Eck, S.; Famaey, B.; Goriely, S.; Plez, B.; Siess, L.; Beers, T.C.; Primas, F.; Jorissen, A. |
| Abstract: |
The remarkable properties of CS 30322–023 became apparent in the course of a study of a sample of 23 carbon-enhanced, metal-poor (CEMP) stars. Its abundance pattern is one of the most well-specified of all known extremely metal-poor stars. With [Fe/H]= −3.5, this is the most metal-poor star to exhibit a clear s-process signature, and the most metal-poor “lead star” known. The available evidence indicates that it is presently a thermally-pulsing asymptotic giant branch (TP–AGB) star, with no strong indication of binarity thus far. |
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