355 citations · 2.3k across the 49 of their papers we have counts for
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AGB Sodium Abundances in the Globular Cluster 47 Tucanae (NGC 104)
Christian I. Johnson, Iain McDonald, Catherine A. Pilachowski +8
A recent analysis comparing the [Na/Fe] distributions of red giant branch (RGB) and asymptotic giant branch (AGB) stars in the Galactic globular cluster NGC 6752 found that the rat…
Low-resolution Spectroscopy for the Globular Clusters with Signs of Supernova Enrichment: M22, NGC 1851 and NGC 288
Dongwook Lim, Sang-Il Han, Young-Wook Lee +5
There is increasing evidence for the presence of multiple red giant branches (RGBs) in the color-magnitude diagrams of massive globular clusters (GCs). In order to investigate the…
Insights from the Outskirts: Chemical and Dynamical Properties in the outer Parts of the Fornax Dwarf Spheroidal Galaxy
Benjamin Hendricks, Andreas Koch, Matthew Walker +3
We present radial velocities and [Fe/H] abundances for 340 stars in the Fornax dwarf spheroidal from R~16,000 spectra. The targets have been obtained in the outer parts of the gala…
Light, Alpha, and Fe-Peak Element Abundances in the Galactic Bulge
Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi +2
We present radial velocities and chemical abundances of O, Na, Mg, Al, Si, Ca, Cr, Fe, Co, Ni, and Cu for a sample of 156 red giant branch stars in two Galactic bulge fields center…
Light Element Chemistry and the Double Red Giant Branch in the Galactic Globular Cluster NGC 288
Tiffany Hsyu, Christian I. Johnson, Young-Wook Lee +1
The globular cluster NGC 288 was previously reported to exhibit two distinct red giant branches (RGBs) in the narrow-band Calcium (HK) and Strömgren b and y band passes. In order t…
The metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
Benjamin Hendricks, Andreas Koch, Gustavo A. Lanfranchi +5
We present alpha-element abundances of Mg, Si, and Ti for a large sample of field stars in two outer fields of the Fornax dwarf spheroidal galaxy (dSph), obtained with VLT/GIRAFFE…