54 citations · 163 across the 9 of their papers we have counts for
9 papers
Strong Progenitor Age-bias in Supernova Cosmology. II. Alignment with DESI BAO and Signs of a Non-Accelerating Universe
Junhyuk Son, Young-Wook Lee, Chul Chung +2
Supernova (SN) cosmology is based on the key assumption that the luminosity standardization process of Type Ia SNe remains invariant with progenitor age. However, direct and extens…
Strong progenitor age bias in supernova cosmology. I. Robust and ubiquitous evidence from a larger sample of host galaxies in a broader redshift range
Chul Chung, Seunghyun Park, Junhyuk Son +2
Type Ia supernovae (SNe Ia) serve as the most crucial standardizable candles in cosmology, providing direct measurements of the universe's expansion history. However, it is well-kn…
On the root cause of the host `mass-step' in the Hubble residuals of type Ia supernovae
Chul Chung, Suk-Jin Yoon, Seunghyun Park +4
It is well established that the Hubble residuals of type Ia supernovae (SNe Ia) show the luminosity step with respect to their host galaxy stellar masses. This `mass-step' is taken…
HST and HSC Weak-lensing Study of the Equal-mass Dissociative Merger CIZA J0107.7+5408
Kyle Finner, Scott W. Randall, M. James Jee +6
A dissociative merger is formed by the interplay of ram pressure and gravitational forces, which can lead to a spatial displacement of the dark matter and baryonic components of th…
Multiwavelength Analysis of A1240, the Double Radio Relic Merging Galaxy Cluster Embedded in a ~80 Mpc-long Cosmic Filament
Hyejeon Cho, M. James Jee, Rory Smith +2
We present a multiwavelength study of the double radio relic cluster A1240 at z=0.195. Our Subaru-based weak lensing analysis detects three mass clumps forming a ~4 Mpc filamentary…
Yonsei Evolutionary Population Synthesis (YEPS) Model. III. Surface Brightness Fluctuation of Normal and Helium-enhanced Simple Stellar Populations
Chul Chung, Suk-Jin Yoon, Hyejeon Cho +2
We present an evolutionary population synthesis model of the surface brightness fluctuation (SBF) for normal and He-enriched simple stellar populations (SSPs). While our SBF model…
The Globular Cluster System of the Coma cD Galaxy NGC 4874 from Hubble Space Telescope ACS and WFC3/IR Imaging
Hyejeon Cho, John P. Blakeslee, Ana L. Chies-Santos +4
We present new HST optical and near-infrared (NIR) photometry of the rich globular cluster (GC) system of NGC 4874, the cD galaxy in the core of the Coma cluster (Abell 1656). NGC…
Measuring Infrared Surface Brightness Fluctuation Distances with HST WFC3: Calibration and Advice
Joseph B. Jensen, John P. Blakeslee, Zachary Gibson +5
We present new calibrations of the near-infrared surface brightness fluctuation (SBF) distance method for the F110W (J) and F160W (H) bandpasses of the Wide Field Camera 3 Infrared…
Optical and IR Photometry of Globular Clusters in NGC1399: Evidence for Color-Metallicity Nonlinearity
John P. Blakeslee, Hyejeon Cho, Eric W. Peng +3
We combine new Wide Field Camera~3 IR Channel (WFC3/IR) F160W (H) imaging data for NGC1399, the central galaxy in the Fornax cluster, with archival F475W (g), F606W (V), F814W (I),…