175 citations · 346 across the 4 of their papers we have counts for
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astro-ph.SR2019★ 50 cited
The chemical composition of HIP34407/HIP34426 and other twin-star comoving pairs
I. Ramirez, S. Khanal, S. J. Lichon +4
We conducted a high-precision elemental abundance analysis of the twin-star comoving pair HIP34407/HIP34426. With mean error of 0.013 dex in the differential abundances (D[X/H]), a…
astro-ph.SR2014★ 175 cited
Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. I. Sample Selection, Data Reduction and NGC 7078 Results
A. Bellini, J. Anderson, R. P. van der Marel +9
We present the first study of high-precision internal proper motions (PMs) in a large sample of globular clusters, based on Hubble Space Telescope (HST) data obtained over the past…
astro-ph.SR2012★ 103 cited
Oxygen abundances in low- and high-alpha field halo stars and the discovery of two field stars born in globular clusters
I. Ramirez, J. Melendez, J. Chaname
Oxygen abundances of 67 dwarf stars in the metallicity range -1.6<[Fe/H]<-0.4 are derived from a non-LTE analysis of the 777 nm O I triplet lines. These stars have precise atmosphe…