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Massive Galaxies are Larger in Dense Environments: Environmental Dependence of Mass-Size Relation of Early-Type Galaxies
Yongmin Yoon, Myungshin Im, Jae-Woo Kim
Under the cold dark matter (CDM) cosmological models, massive galaxies are expected to be larger in denser environments through frequent hierarchical mergers with other gala…
ALMA and RATIR observations of GRB131030A
Kuiyun Huang, Yuji Urata, Satoko Takahashi +22
We report on the first open-use based Atacama Large Millimeter/submm Array (ALMA) 345-GHz observation for the late afterglow phase of GRB131030A. The ALMA observation constrained a…
The Most Massive Active Galactic Nuclei at
Hyunsung D. Jun, Myungshin Im, Dohyeong Kim +1
We obtained near-infrared spectra of 26 SDSS quasars at with reported rest-frame ultraviolet to critically examine the systematic eff…
Development of SED Camera for Quasars in Early Universe (SQUEAN)
Sanghyuk Kim, Yiseul Jeon, Hye-In Lee +6
We describe the characteristics and performance of a camera system, Spectral energy distribution Camera for Quasars in Early Universe (SQUEAN). It was developed to measure SEDs of…
Discovery of a Supercluster at 0.91 and Testing the CDM Cosmological Model
J. -W. Kim, M. Im, S. -K. Lee +13
The CDM cosmological model successfully reproduces many aspects of the galaxy and structure formation of the universe. However, the growth of large-scale structures (LSSs) in th…
The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars at z > 5 based on Medium-Band Observation with SQUEAN
Yiseul Jeon, Myungshin Im, Soojong Pak +5
Multiple color selection techniques have been successful in identifying quasars from wide-field broad-band imaging survey data. Among the quasars that have been discovered so far,…