CS 30322--023: An Ultra Metal-Poor TP-AGB Star?

Details CS 30322--023: An Ultra Metal-Poor TP-AGB Star? CS 30322--023: An Ultra Metal-Poor TP-AGB Star?

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..378..129m&link_type=abstract

Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes. ASP Conference Series, Vol. 378, proceedings of the co

Astronomy and Astrophysics

Astronomy

Scientific paper

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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