Speaker
Description
We present a novel approach for categorical analysis of strongly carbon-enhanced metal-poor (CEMP) stars using medium-resolution (R~1,800) spectra. Analysis of cool (Teff ~ 4000 K) CEMP stars is largely inhibited by a strong depression of the underlying continuum (veiling) by extreme molecular bands, making normalization and fitting of metallic features such as Ca II H&K lines difficult.
Consequently, few metal-poor dwarf carbon stars are known, with which we can constrain the low-mass tail of the Pop II IMF. We present a new technique for spectral normalization of these stars, and explore a technique for assigning CEMP morphological types based on characteristic abundances seen in Group I, II, and III CEMP stars, using the Yoon-Beers diagram introduced in Yoon et al. (2016).
Affiliation
Department of Physics, University of Notre Dame, Notre Dame, IN. 46556, USA
JINA Center for the Evolution of the Elements (JINA-CEE), USA
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