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M-dwarf metallicities - A high-resolution spectroscopic study in the near infrared
Anna Önehag, Ulrike Heiter, Bengt Gustafsson +3
The relativley large spread in the derived metallicities ([Fe/H]) of M dwarfs shows that various approaches have not yet converged to consistency. The presence of strong molecular…
Radiative hydrodynamics simulations of red supergiant stars. IV gray versus non-gray opacities
A. Chiavassa, B. Freytag, T. Masseron +1
Red supergiants are massive evolved stars that contribute extensively to the chemical enrichment of our Galaxy. It has been shown that convection in those stars gives rise to large…
[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy
Catherine R. Kennedy, Thirupathi Sivarani, Timothy C. Beers +6
We report on oxygen abundances determined from medium-resolution near-IR spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO surve…