30 citations · 78 across the 7 of their papers we have counts for
7 papers · 1 filter
The chemical compositions and evolutionary status of red giants in the open cluster NGC 6940
G. Böcek Topcu, M. Afşar, C. Sneden
We present the high resolution (R 60000), high signal-to-noise (S/N 120) spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. We…
Helium at white dwarf photospheric conditions: preliminary laboratory results
Marc Schaeuble, Ross E. Falcon, Thomas A. Gomez +3
We present preliminary results of an experimental study exploring helium at photospheric conditions of white dwarf stars. These data were collected at Sandia National Laboratories'…
Reaching Higher Densities for Laboratory White Dwarf Photospheres to Measure Spectroscopic Line Profiles
Ross E. Falcon, J. E. Bailey, T. A. Gomez +5
As part of our laboratory investigation of the theoretical line profiles used in white dwarf atmosphere models, we extend the electron-density () range measured by our e…
A Detailed Study of Giants and Horizontal Branch Stars in M68: Atmospheric Parameters and Chemical Abundances
Marc Schaeuble, George Preston, Chris Sneden +3
In this paper, we present a detailed high-resolution spectroscopic study of post main sequence stars in the Globular Cluster M68. Our sample, which covers a range of 4000 K in $T_{…
The Chemical Compositions and Evolutionary Status of Red Giants in the Open Cluster NGC 752
G. Böcek Topcu, M. Afşar, M. Schaeuble +1
We present detailed chemical compositions of 10 red giant star members of the Galactic (open) cluster NGC 752, derived from high-resolution (R 60,000), high signal-to-noi…
New Lithium Measurements in Metal-Poor Stars
Marc Schaeuble, Jeremy R. King
We provide *lambda*6708 Li 1 measurements in 37 metal-poor stars, most of which are poorly-studied or have no previous measurements, from high-resolution and high-S/N spectroscopy…
Lithium in the Upper Centaurus Lupus and Lower Centaurus Crux Subgroups of Scorpius-Centaurus
Eric J. Bubar, Marc Schaeuble, Jeremy R. King +2
We utilize spectroscopically derived model atmosphere parameters and the \ion{Li}{1} subordinate line and the doublet to derive lithium abundances for 1…