activity
19982018
most citedLithium isotopic abundances in metal-poor halo stars

453 citations · 1.3k across the 16 of their papers we have counts for

collaborators

16 papers

astro-ph.GA2018★ 4 cited

The Connection Between Different Tracers Of The Diffuse Interstellar Medium: Kinematics

Johnathan S. Rice, S. R. Federman, Nicolas Flagey +4

Using visible, radio, microwave, and sub-mm data, we study several lines of sight toward stars generally closer than 1 kpc on a component-by-component basis. We derive the componen…

astro-ph.GA2018★ 20 cited

Abundances and Depletions of Neutron-Capture Elements in the Interstellar Medium

Adam M. Ritchey, Steven R. Federman, David L. Lambert

We present an extensive analysis of the gas-phase abundances and depletion behaviors of neutron-capture elements in the interstellar medium (ISM). Column densities (or upper limits…

astro-ph.SR2016★ 37 cited

Follow-up observations of extremely metal-poor stars identified from SDSS

D. S. Aguado, C. Allende Prieto, J. I. González Hernández +5

The most metal-poor stars in the Milky Way witnessed the early phases of formation of the Galaxy, and have chemical compositions that are close to the pristine mixture from Big Ban…

astro-ph.GA2015★ 30 cited

The CN/CN Ratio in Diffuse Molecular Clouds

Adam M. Ritchey, Steven R. Federman, David L. Lambert

We report the first detection of CN in diffuse molecular gas from a detailed examination of CN absorption lines in archival VLT/UVES spectra of stars probing local diffuse c…

astro-ph.SR2014★ 55 cited

Elemental Abundances of Solar Sibling Candidates

I. Ramirez, A. T. Bajkova, V. V. Bobylev +6

Dynamical information along with survey data on metallicity and in some cases age have been used recently by some authors to search for candidates of stars that were born in the cl…

astro-ph.SR2013★ 253 cited

Oxygen Abundances in Nearby FGK Stars and the Galactic Chemical Evolution of the Local Disk and Halo

I. Ramirez, C. Allende Prieto, D. L. Lambert

Atmospheric parameters and oxygen abundances of 825 nearby FGK stars are derived using high-quality spectra and a non-LTE analysis of the 777 nm O I triplet lines. We assign a kine…