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A grid of MARCS model atmospheres for late-type stars. I. Methods and general properties
Context. In analyses of stellar spectra and colours, and for the analysis of integrated light from galaxies, a homogeneous grid of model atmospheres of late-type stars and corresponding flux spectra
Gaia Data Release 2
Context. The second data release of the Gaia mission (DR2) includes an advance catalogue of variable stars. The classifications of these stars are based on sparse photometry from the first 22 months
Nucleosynthetic signatures of the first stars
The discovery of HE1327–2326 is reported, a subgiant or main-sequence star with an iron abundance about a factor of two lower than that of HE0107–5240, suggesting a similar origin of the abundance patterns.
The chemical composition of carbon stars. I. Carbon, nitrogen, and oxygen in 30 cool carbon stars in the Galactic disk
The chemical compositions of 30 Galactic carbon stars are determined from high-resolution infrared (1.5-2.5 ¡im) spectra and new model atmospheres. Elemental C, N, and O abundances (with respect to
HE 0557–4840: Ultra-Metal-Poor and Carbon-Rich*
We report the discovery and high-resolution, high-S/N spectroscopic analysis of the ultra-metal-poor red giant HE 0557-4840, which is the third most heavy-element-deficient star currently known. It
HE 1327–2326, an Unevolved Star with [Fe/H]<–5.0. II. New 3D–1D Corrected Abundances from a Very Large Telescope UVES Spectrum*
We present a new abundance analysis of HE 1327?2326, which is currently the most iron-poor star, based on observational data obtained with the VLT Ultraviolet and Visual Echelle Spectrograph (UVES).
A study of circumstellar envelopes around bright carbon stars. I: Structure, kinematics, and mass-loss rate
We have performed a survey of circumstellar CO emission on a sample of bright carbon stars, which is relatively complete out to about 900 pc from the Sun. In total, 68 detections were made. All
The dust condensation sequence in red supergiant stars
Context. Red supergiant (RSG) stars exhibit significant mass loss by means of a slow, dense wind. They are often considered to be the more massive counterparts of Asymptotic Giant Branch (AGB) stars.
The Gaia-ESO Public Spectroscopic Survey
The Gaia-ESO Public Spectroscopic Survey has begun and will obtain high quality spectroscopy of some 100000 Milky Way stars, in the field and in open clusters, down to magnitude 19, systematically ...
He 1327-2326, an unevolved star with [Fe/H] < -5.0. I. A comprehensive abundance analysis
HE 1327-2326, an Unevolved Star with [Fe/H] < -5.0. : I. A Comprehensive Abundance Analysis