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A Comparative Study Between M30 and M92 : M92 Is A Merger Remnant With A Large Helium Enhancement
Jae-Woo Lee
We perform a comparative study of the ex--situ second--parameter pair globular clusters (GCs) M30 and M92, having similar metallicities but different horizontal branch morphologies…
Carbon Abundance of Globular Cluster M22 (NGC 6656) and the Surface Carbon Depletion Rates of the Milky Way Globular Clusters
Jae-Woo Lee
It is well known that metal-poor red giant branch (RGB) stars show variations in some elemental abundances, including carbon, due to the internal mixing accompanied by their own in…
M92 (NGC~6341) Is a Metal-Complex Globular Cluster with an Atypical Primordial Population
Jae-Woo Lee
We present a multiple stellar population study of the metal-poor globular cluster (GC) M92 (NGC 6341), which is long known for the substantial metallicity dispersion, using our own…
Correlation study of temporal and emission properties of quiescent magnetars
Jiwoo Seo, Jaewon Lee, Hongjun An
We measured temporal and emission properties of quiescent magnetars using archival Chandra and XMM-Newton data, produced a list of the properties for 17 magnetars, and revisited pr…