229 citations · 1k across the 16 of their papers we have counts for
16 papers
RoDyGS: Robust Dynamic Gaussian Splatting for Casual Videos
Junmyeong Lee, Hoseung Choi, Yoonwoo Jeong +1
4D reconstruction from casually captured monocular videos is challenging due to inherent ambiguity in reconstructing dynamic 3D geometry. To address this challenge, we introduce Ro…
Star-Gas Misalignment in Galaxies: II. Origins Found from the Horizon-AGN Simulation
Donghyeon J. Khim, Sukyoung K. Yi, Christophe Pichon +5
There have been many studies aiming to reveal the origins of the star-gas misalignment found in galaxies, but there still is a lack of understanding of the contribution from each f…
YZiCS: On the Mass Segregation of Galaxies in Clusters
Seonwoo Kim, Emanuele Contini, Hoseung Choi +5
Mass segregation, a tendency of more massive galaxies being distributed closer to the cluster center, is naturally expected from dynamical friction, but its presence is still contr…
Exploring the origin of thick disks using the NewHorizon and Galactica simulations
Minjung J. Park, Sukyoung K. Yi, Sebastien Peirani +8
Ever since a thick disk was proposed to explain the vertical distribution of the Milky Way disk stars, its origin has been a recurrent question. We aim to answer this question by i…
Introducing the NewHorizon simulation: Galaxy properties with resolved internal dynamics across cosmic time
Yohan Dubois, Ricarda Beckmann, Frédéric Bournaud +13
Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, us…
The role of mergers and interactions in driving the evolution of dwarf galaxies over cosmic time
G. Martin, R. A. Jackson, S. Kaviraj +9
Dwarf galaxies (M*<10^9 Msun) are key drivers of mass assembly in high mass galaxies, but relatively little is understood about the assembly of dwarf galaxies themselves. Using the…
YZiCS: Unveiling Quenching History of Cluster Galaxies Using Phase-space Analysis
Jinsu Rhee, Rory Smith, Hoseung Choi +4
We used the time since infall (TSI) of galaxies, obtained from the Yonsei Zoom-in Cluster Simulation, and the star formation rate (SFR) from the Sloan Digital Sky Survey (SDSS) Dat…
Star-gas misalignment in galaxies: I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI
Donghyeon J. Khim, Sukyoung K. Yi, Yohan Dubois +12
Recent integral field spectroscopy observations have found that about 11% of galaxies show star-gas misalignment. The misalignment possibly results from external effects such as ga…
New Horizon: On the origin of the stellar disk and spheroid of field galaxies at
Min-Jung Park, Sukyoung K. Yi, Yohan Dubois +7
The origin of the disk and spheroid of galaxies has been a key open question in understanding their morphology. Using the high-resolution cosmological simulation, New Horizon, we e…
YZiCS: Preprocessing of dark halos in the hydrodynamic zoom-in simulation of clusters
San Han, Rory Smith, Hoseung Choi +4
To understand the galaxy population in clusters today, we should also consider the impact of previous environments prior to cluster infall, namely preprocessing. We use YZiCS, a hy…
On the origin of gas-poor galaxies in galaxy clusters using cosmological hydrodynamic simulations
Seoyoung L. Jung, Hoseung Choi, O. Ivy Wong +3
The environmental effect is commonly used to explain the excess of gas-poor galaxies in galaxy clusters. Meanwhile, the presence of gas-poor galaxies at cluster outskirts, where ga…
Wobbling galaxy spin axes in dense environments
Jaehyun Lee, Suk Kim, Hyunjin Jeong +7
The orientation of galaxy spin vectors within the large scale structure has been considered an important test of our understanding of structure formation. We investigate the angula…
Early-type galaxy spin evolution in the Horizon-AGN simulation
Hoseung Choi, Sukyoung K. Yi, Yohan Dubois +3
Using the Horizon-AGN simulation data, we study the relative role of mergers and environmental effects in shaping the spin of early-type galaxies (ETGs) after . We foll…
Phase-space Analysis in the Group and Cluster environment: Time since Infall and Tidal Mass Loss
Jinsu Rhee, Rory Smith, Hoseung Choi +4
Using the latest cosmological hydrodynamic N-body simulations of groups and clusters, we study how location in phase-space coordinates at can provide information on envir…
On the evolution of galaxy spin in a cosmological hydrodynamic simulation of galaxy clusters
Hoseung Choi, Sukyoung Yi
The traditional view of the morphology-spin connection is being challenged by recent integral-field-unit observations, as the majority of early-type galaxies are found to have a ro…
The Preferential Tidal Stripping of Dark Matter versus Stars in Galaxies
Rory Smith, Hoseung Choi, Jaehyun Lee +3
Using high resolution hydrodynamical cosmological simulations, we conduct a comprehensive study of how tidal stripping removes dark matter and stars from galaxies. We find that dar…