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Stellar Stream and Halo Structure in the Andromeda Galaxy From a Subaru/Hyper Suprime-Cam Survey
Yutaka Komiyama, Masashi Chiba, Mikito Tanaka +13
We present wide and deep photometry of the northwest part of the halo of the Andromeda galaxy (M31) using Hyper Suprime-Cam on the Subaru Telescope. The survey covers 9.2 deg…
Tracing the Spiral Structure of the Outer Milky Way with Dense Atomic Hydrogen Gas
Bon-Chul Koo, Geumsook Park, Woong-Tae Kim +3
We present a new face-on map of dense neutral atomic hydrogen (HI) gas in the outer Galaxy. Our map has been produced from the Leiden/Argentine/Bonn (LAB) HI 21-cm line all-sky sur…
Detection of a Large Population of Ultra Diffuse Galaxies in Massive Galaxy Clusters: Abell S1063 and Abell 2744
Myung Gyoon Lee, Jisu Kang, Jeong Hwan Lee +1
We present the detection of a large population of ultra diffuse galaxies (UDGs) in two massive galaxy clusters, Abell S1063 at and Abell 2744 at , based on F814W…
Resolving the Discrepancy of Distance to M60, a Giant Elliptical Galaxy in Virgo
Myung Gyoon Lee, In Sung Jang
There is a well-known discrepancy in the distance estimation for M60, a giant elliptical galaxy in Virgo: the planetary nebula luminosity function (PNLF) distance moduli for this g…
The Carnegie-Chicago Hubble Program. III. The Distance to NGC 1365 via the Tip of the Red Giant Branch
In Sung Jang, Dylan Hatt, Rachael L. Beaton +8
The Carnegie-Chicago Hubble Program seeks to anchor the distance scale of Type Ia supernovae via the Tip of the Red Giant Branch (TRGB). Based on deep …
The Carnegie-Chicago Hubble Program: Discovery of the Most Distant Ultra-faint Dwarf Galaxy in the Local Universe
Myung Gyoon Lee, In Sung Jang, Rachael Beaton +3
Ultra-faint dwarf galaxies (UFDs) are the faintest known galaxies and due to their incredibly low surface brightness, it is difficult to find them beyond the Local Group. We report…
The Fastest Galaxy Evolution in an Unbiased Compact Group Sample with WISE
Gwang-Ho Lee, Ho Seong Hwang, Jubee Sohn +1
We study the mid-infrared (MIR) properties of galaxies in compact groups and their environmental dependence using the \textit{Wide-field Infrared Survey Explorer (WISE)} data. We u…