The 9th Magnitude CEMP star BD+44°493: Origin of its Carbon Excess and Beryllium Abundance

Details The 9th Magnitude CEMP star BD+44°493: Origin of its Carbon Excess and Beryllium Abundance The 9th Magnitude CEMP star BD+44°493: Origin of its Carbon Excess and Beryllium Abundance

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..265..124i&link_type=abstract

Chemical Abundances in the Universe: Connecting First Stars to Planets, Proceedings of the International Astronomical Union, IAU

Astronomy and Astrophysics

Astronomy

1

Stars: Abundances, Stars: Individual(Bd+44°493), Stars: Population Ii

Scientific paper

We performed a chemical abundance analysis of the very bright (V = 9.1) carbon-enhanced metal-poor (CEMP) star BD+44°493, which is the first star found with metallicity [Fe/H] < -3.5 and an apparent magnitude V < 12. The star is classified as a CEMP-no” subgiant, and its abundance pattern implies that a first-generation faint supernova is the most likely origin of its carbon excess. We set an very low upper limit on this star's beryllium abundance, which demonstrates that high C and O abundances do not necessarily imply high Be abundances.

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