0000000001053552

AUTHOR

L. Zacs

showing 2 related works from this author

The chemical composition of extremely metal-poor and carbon-rich star HD 112869

2005

The preliminary results of abundance analysis are presented for extremely metal-poor carbon star HD 112869 = TT CVn = CGCS 3319. The radial velocity was found to be −137.7 km s −1 . Our LTE abundance analysis supports an extremely low metallicity for TT CVn, [Fe/H] = −3.2, and a significant overabundance of carbon and neutron-capture elements. The 12 C/ 13 C ratio in the atmosphere of HD 112869 is high.

Materials scienceK-type main-sequence starMetallicitychemistry.chemical_elementAstronomyAstronomy and AstrophysicsAstrophysicsCarbon starRadial velocityAtmosphereT Tauri starchemistrySpace and Planetary ScienceCarbonO-type main-sequence starProceedings of the International Astronomical Union
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Post-AGB candidates in LMC and SMC SALT spectra

2020

We selected a sample of post-AGB candidates in the Magellanic Clouds on the basis of their near- and mid-infrared colour characteristics. Fifteen of the most optically bright post-AGB candidates were observed with the South African Large Telescope in order to determine their stellar parameters and thus to validate or discriminate their nature as post-AGB objects in the Magellanic Clouds. The spectral types of absorption-line objects were estimated according to the MK classification, and effective temperatures were obtained by means of stellar atmosphere modelling. Emission-line objects were classified on the basis of the fluxes of the emission lines and the presence of the continuum. Out of…

observational astronomygalactic and extragalactic astronomyAstrophysics and AstronomyStellar AstronomyPhysicsGiant starsMagellanic CloudsNatural SciencesSpectroscopy
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