Chemical Abundances Of Carbon-enhanced Metal-poor Stars With X-shooter

Details Chemical Abundances Of Carbon-enhanced Metal-poor Stars With X-shooter Chemical Abundances Of Carbon-enhanced Metal-poor Stars With X-shooter

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21931306k&link_type=abstract

American Astronomical Society, AAS Meeting #219, #313.06

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present abundances of carbon-enhanced metal-poor (CEMP) stars observed with the X-Shooter spectrograph on the ESO VLT. With broad wavelength coverage, spanning from near-UV to near-IR, these moderate resolution spectra are used to estimate CNO abundances and neutron-capture-element abundances for a sample of 27 metal-poor stars. With these estimates in hand, we classify each CEMP star according to its chemical signature. The classes of CEMP stars that we identify are suggestive of different mechanisms that gave rise to their carbon enhancements. We discuss the likely sites of carbon production associated with these types of stars.
This work was supported in part from grants AST 07-07776, as well as from PHY 02-15783 and PHY 08-22648; Physics Frontier Center/Joint Institute for Nuclear Astrophysics (JINA), awarded by the US National Science Foundation. This work was also supported in part by the Danish Natural Science Research Council.

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