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The Forbidden Abundance of Oxygen in the Sun
We reexamine closely the solar photospheric line at 6300 A, which is attributed to a forbidden line of neutral oxygen and is widely used in analyses of other late-type stars. We use a
S4N: A spectroscopic survey of stars in the solar neighborhood: The nearest 15 pc
We report the results of a high-resolution spectroscopic survey of all the stars more luminous than M V = 6.5 mag within 14.5 pc from the Sun. The Hipparcos catalog's completeness limits guarantee
The chemical compositions of Galactic disc F and G dwarfs
Photospheric abundances are presented for 27 elements from carbon to europium in 181 F and G dwarfs from a differential local thermodynamic equilibrium (LTE) analysis of high-resolution and high
A Reappraisal of the Solar Photospheric C/O Ratio
An accurate determination of photospheric solar abundances requires detailed modeling of the solar granulation and accounting for departures from local thermodynamical equilibrium (LTE). We argue
A new high-resolution cross-dispersed echelle spectrometer has been installed at the coude focus of the McDonald Observatory 2.7-m telescope. Its primary goal was to simultaneously gather spectra
Elemental abundance survey of the Galactic thick disc
We have performed an abundance analysis for F- and G- dwarfs of the Galactic thick-disc component. A sample of 176 nearby (d≤ 150 pc) thick-disc candidate stars was chosen from the Hipparcos
Ultraviolet Survey of CO and H2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
We carried out a comprehensive far-UV survey of 12CO and H2 column densities along diffuse molecular Galactic sight lines. This sample includes new measurements of CO from HST spectra along 62 sight
Lithium isotopic abundances in metal-poor halo stars
Very high quality spectra of 24 metal-poor halo dwarfs and subgiants have been acquired with ESO's VLT/UVES for the purpose of determining Li isotopic abundances. The derived one-dimensional, non-LTE
Carbon, Nitrogen, and Oxygen Abundances in Early B-Type Stars
We report on a survey of the C, N, and O abundances in a sample of early B-type stars which was undertaken to test Lyubimkov's claim that CN-cycled material is mixed to the surfaces of these stars
Nucleosynthesis and Mixing on the Asymptotic Giant Branch. III. Predicted and Observed s-Process Abundances
We present the results of s-process nucleosynthesis calculations for asymptotic giant branch (AGB) stars of different metallicities and different initial stellar masses (1.5 and 3 M☉), and we present