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A Search for Unrecognized Carbon-Enhanced Metal-Poor Stars

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dc.contributor.author Placco, V. M
dc.contributor.author Kennedy, C. R
dc.contributor.author Rossi, S
dc.contributor.author Beers, T. C
dc.contributor.author Christlieb, N
dc.contributor.author Sivarani, T
dc.date.accessioned 2011-02-03T10:03:57Z
dc.date.available 2011-02-03T10:03:57Z
dc.date.issued 2010-03
dc.identifier.citation K. Cunha, M. Spite & B Barbuy, eds., Chemical abundances in the Universe: connecting first Stars to Planets, Proceedings IAU Symposium No. 265, 2009, pp. 132-133 en
dc.identifier.uri http://hdl.handle.net/2248/5335
dc.description Restricted Access en
dc.description.abstract We have developed a new procedure to search for Carbon-Enhanced Metal-Poor (CEMP) stars from the Hamburg/ESO (HES) prism-survey plates. This method uses an extended line index for the CH G-band, which we demonstrate to have superior behavior when compared to the narrower G-band index formerly employed for these spectra. A first subsample, biased towards brighter stars (B<15.5), has been extracted from the scanned HES plates. After visual inspection (to eliminate spectra compromised by plate defects, overlapping spectra, etc., and to carry out rough spectral classifications), a list of 669 previously unidentified candidate CEMP stars was compiled. Follow-up spectroscopy for a pilot sample of 132 candidates was obtained on the SOAR 4.1m telescope. Our results show that most of the stars observed lie in the targetted metallicity range, and possess prominent carbon absorption features at 4300˚A. The success rate for the identification of new CEMP stars is ∼50% for [Fe/H]< −2.0. For stars with [Fe/H]< −2.5, the ratio increases to 100%. en
dc.language.iso en en
dc.publisher Cambridge University Press en
dc.relation.uri http://dx.doi.org/10.1017/S1743921310000402 en
dc.rights © Cambridge University Press en
dc.subject Stars: abundances en
dc.subject Stars: carbon en
dc.subject Stars: Population II en
dc.subject Galaxy: halo, surveys en
dc.title A Search for Unrecognized Carbon-Enhanced Metal-Poor Stars en
dc.type Article en

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