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Analysis of chemical abundances in planetary nebulae with [WC] central stars II. Chemical abundances and the abundance discrepancy factor
(EDP Sciences, 2013)
Aims. We present the abundance analysis of 12 planetary nebulae ionized by [WC]-type stars and weak-emission-line stars (wels)
obtained from high-resolution spectrophotometric data. Our main aims are to determine the ...
Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO
(Astronomy and Astrophysics, 2019-02-01)
Context. Detailed chemical abundances of Galactic stars are needed in order to improve our knowledge of the formation and evolution of our galaxy, the Milky Way. Aims. We took advantage of the GIANO archive spectra to ...
Abundance ratios of red giants in low-mass ultra-faint dwarf spheroidal galaxies
(EDP SCIENCES, 2016-04)
Context. Low-mass dwarf spheroidal galaxies are key objects for our understanding of the chemical evolution of the pristine Universe and the Local Group of galaxies. Abundance ratios in stars of these objects can be used ...
Chemical abundances of main-sequence, turnoff, subgiant, and red giant stars from APOGEE Spectra. I. Signatures of diffusion in the open cluster M67
(IOP Publishing Ltd, 2018)
Detailed chemical abundance distributions for 14 elements are derived for eight high-probability stellar members of the solar metallicity old open cluster M67 with an age of similar to 4 Gyr. The eight stars consist of ...