283 citations · 1k across the 17 of their papers we have counts for
7 papers · 2 filters
Magnesium isotope ratios in Hyades stars
David Yong, David L. Lambert, Carlos Allende Prieto +1
Using classical model atmospheres and an LTE analysis, Mg isotope ratios 24Mg:25Mg:26Mg are measured in 32 Hyades dwarfs covering 4000K < Teff < 5000K. We find no significant trend…
Magnesium isotopic abundance ratios in cool stars
David Yong, David L. Lambert, Inese I. Ivans
From high resolution spectra of 61 cool dwarfs and giants, Mg isotopic abundance ratios 24Mg:25Mg:26Mg are derived from spectral synthesis of the MgH A-X lines near 5140A. Our samp…
Finding cool subdwarfs using a V-J reduced proper-motion diagram: Stellar parameters for 91 candidates
David Yong, David L. Lambert
We present the results of a search for cool subdwarfs for which our candidates were drawn from a V-J reduced proper-motion diagram constructed by Salim & Gould (2002). Kinematic (U…
Fluorine Abundances in the Large Magellanic Cloud and Omega Centauri: Evidence for Neutrino Nucleosynthesis?
K. Cunha, V. V. Smith, D. L. Lambert +1
The behavior of fluorine with metallicity has not yet been probed in any stellar population. In this work, we present the first fluorine abundances measured outside of the Milky Wa…
Further Evidence for Chemical Fractionation from Ultraviolet Observations of Carbon Monoxide
S. R. Federman, David L. Lambert, Yaron Sheffer +4
Ultraviolet absorption from interstellar 12CO and 13CO was detected toward rho Oph A and chi Oph. The measurements were obtained at medium resolution with the Goddard High Resoluti…
Non-LTE Model Atmospheres for Late-Type Stars II. Restricted NLTE Calculations for a Solar-Like Atmosphere
C. Allende Prieto, I. Hubeny, D. L. Lambert
We test our knowledge of the atomic opacity in the solar UV spectrum. Using the atomic data compiled in Paper I from modern, publicly available, databases, we perform calculations…