Proc. IAU volume 13, issue S334, P364-365 2017 DOI: 10.1017/s1743921317007062 View full text
M. Steffen, A. J. Gallagher, E. Caffau, P. Bonifacio, H.-G. Ludwig

Abstract: We present our latest 3D model atmospheres for carbon-enhanced metal-poor (CEMP) stars computed with the CO5BOLD code. The stellar parameters are representative of hot turnoff objects (T eff ∼ 6250 K, log g = 4.0, [Fe/H]=3). The main purpose of these models is to investigate the role of 3D effects on synthetic spectra of the CH G-band (4140-4400Å), the CN BX-band (3870-3890Å), and several UV OH transitions (3122-3128Å). By comparison with the synthetic spectra from standard 1D model atmospheres (assuming loca…

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