139 citations · 940 across the 29 of their papers we have counts for
30 papers
Patchy Reionization Delays Quenching in Isolated Ultra-faint Dwarf Galaxies
Juyoung Kim, Myoungwon Jeon, Yumi Choi +1
The spatially inhomogeneous nature of cosmic reionization is directly encoded in the quenching timescales of ultra-faint dwarf galaxies (UFDs). While most cosmological simulations…
Which filaments matter: the relative scalings of anisotropic infall
Junsup Shim, Dmitri Pogosyan, Myoungwon Jeon +1
Dark-matter haloes do not form in isolation but within the surrounding cosmic web. By the time a halo begins to collapse, its larger-scale environment has typically collapsed along…
How Massive Can a Population III Starburst Be? Simulating the First Galaxies with High Lyman-Werner Background
Tae Bong Jeong, Alessandra Venditti, Volker Bromm +4
Observing the first generation of Population~III (Pop~III) stars is one of the most demanding challenges in astronomy. Indeed, Pop~III stars are expected to predominantly form with…
Star Formation Histories of Early-type Dwarfs in Group Environment
Hong Bae Ann, Mira Seo, Myoungwon Jeon
We investigate the star formation histories (SFHs) of 983 early-type dwarf galaxies classified into five morphological subtypes, dS0, dE, dEbc, dSph, and dEbl,across six environmen…
The HST Legacy Archival Uniform Reduction of Local Group Imaging (LAURELIN). I. Photometry and Star Formation Histories for 36 Ultra-faint Dwarf Galaxies
Meredith J. Durbin, Yumi Choi, Alessandro Savino +14
We present uniformly measured resolved stellar photometry and star formation histories (SFHs) for 36 nearby ( 400 kpc) ultra-faint dwarf galaxies (UFDs; $-7.1 \le M_V \le…
The Hubble Space Telescope Survey of M31 Satellite Galaxies IV. Survey Overview and Lifetime Star Formation Histories
A. Savino, D. R. Weisz, A. E. Dolphin +35
From orbits of HST imaging, we present deep homogeneous resolved star color-magnitude diagrams that reach the oldest main sequence turnoff and uniformly measured star forma…
Exploring effects of IMF sampling and SN feedback injection on star formation and metallicity in ultra-faint dwarf galaxies
Myoungwon Jeon, Minsung Go
We examine the impact of various Initial Mass Function (IMF) sampling and supernova (SN) feedback injection methods on the star formation and metal enrichment histories of Ultra-Fa…
Simulating High-redshift Galaxies: Enhancing UV Luminosity with Star Formation Efficiency and a Top-heavy IMF
Tae Bong Jeong, Myoungwon Jeon, Hyunmi Song +1
Recent findings from photometric and spectroscopic JWST surveys have identified examples of high-redshift galaxies at . These high- galaxies appear to form much ea…
Understanding Stellar Mass-Metallicity and Size Relations in Simulated Ultra-Faint Dwarf Galaxies
Minsung Go, Myoungwon Jeon, Yumi Choi +7
Reproducing the physical characteristics of ultra-faint dwarf galaxies (UFDs) in cosmological simulations is challenging, particularly with respect to stellar metallicity and galax…
Deep Hubble Space Telescope Photometry of LMC and Milky Way Ultra-Faint Dwarfs: A careful look into the magnitude-size relation
Hannah Richstein, Nitya Kallivayalil, Joshua D. Simon +16
We present deep Hubble Space Telescope (HST) photometry of ten targets from Treasury Program GO-14734, including six confirmed ultra-faint dwarf galaxies (UFDs), three UFD candidat…
The Impact of Patchy Reionization on Ultra-faint Dwarf Galaxies
Jaeeun Kim, Myoungwon Jeon, Yumi Choi +3
We investigate how patchy reionization affects the star formation history (SFH) and stellar metallicity of ultra-faint dwarf galaxies (UFDs). Patchy reionization refers to varying…
Hypernova signatures of the first stars in dwarf galaxies in the Local Group
Teayong Lee, Myoungwon Jeon, Volker Bromm
Observing the first generation of stars, Population III (Pop III), is still a challenge even with the James Webb Space Telescope (JWST) due to their faintness. Instead, searching f…
The Hubble Space Telescope Survey of M31 Satellite Galaxies II. The Star Formation Histories of Ultra-Faint Dwarf Galaxies
A. Savino, D. R. Weisz, E. D. Skillman +34
We present the lifetime star formation histories (SFHs) for six ultra-faint dwarf (UFD; , ) satellite galaxies of M31 based on…
The Hubble Space Telescope Survey of M31 Satellite Galaxies I. RR Lyrae-based Distances and Refined 3D Geometric Structure
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman +33
We measure homogeneous distances to M31 and 38 associated stellar systems (16.8 6.0), using time-series observations of RR Lyrae stars taken as part of the Hubbl…
Structural parameters and possible association of the Ultra-Faint Dwarfs Pegasus III and Pisces II from deep Hubble Space Telescope photometry
Hannah Richstein, Ekta Patel, Nitya Kallivayalil +17
We present deep Hubble Space Telescope (HST) photometry of the ultra-faint dwarf (UFD) galaxies Pegasus III (Peg III) and Pisces II (Psc II), two of the most distant satellites in…
Star Formation Histories of Ultra-Faint Dwarf Galaxies: environmental differences between Magellanic and non-Magellanic satellites?
Elena Sacchi, Hannah Richstein, Nitya Kallivayalil +18
We present the color-magnitude diagrams and star formation histories (SFHs) of seven ultra-faint dwarf galaxies: Horologium 1, Hydra 2, Phoenix 2, Reticulum 2, Sagittarius 2, Trian…
Highly r-process enhanced stars in ultra-faint dwarf galaxies
Myoungwon Jeon, Gurtina Besla, Volker Bromm
Highly r-process enhanced metal-poor stars (MP r-II, and ) have been observed in ultra-faint dwarf (UFD) galaxy, specifically in Reticulum~I…
The role of faint population III supernovae in forming CEMP stars in ultra-faint dwarf galaxies
Myoungwon Jeon, Volker Bromm, Gurtina Besla +2
CEMP-no stars, a subset of carbon enhanced metal poor (CEMP) stars ( and ) have been discovered in ultra-faint dwarf (UFD) galaxies, with $…
Probing the assembly of dwarf galaxies through cosmic time with damped Lyman- absorption spectroscopy
Myoungwon Jeon, Gurtina Besla, Volker Bromm
We investigate the absorption features associated with a gas-rich dwarf galaxy using cosmological hydrodynamics simulations. Our goal is to explore whether the progenitors of the l…
Signature of the first galaxies in JWST deep field observations
Myoungwon Jeon, Volker Bromm
We examine the assembly process and the observability of a first galaxy (M_vir~10^9 solar mass at z~8) with cosmological zoom-in, hydrodynamic simulations, including the radiative,…
Connecting the first galaxies with ultra faint dwarfs in the Local Group: chemical signatures of Population~III stars
Myoungwon Jeon, Gurtina Besla, Volker Bromm
We investigate the star formation history and chemical evolution of isolated analogues of Local Group (LG) ultra faint dwarf galaxies (UFDs; stellar mass range of 10^2 solar mass <…
The Aurora radiation-hydrodynamical simulations of reionization: calibration and first results
Andreas H. Pawlik, Alireza Rahmati, Joop Schaye +2
We introduce a new suite of radiation-hydrodynamical simulations of galaxy formation and reionization called Aurora. The Aurora simulations make use of a spatially adaptive radiati…
The first galaxies: simulating their feedback-regulated assembly
Myoungwon Jeon, Volker Bromm, Andreas H. Pawlik +1
We investigate the formation of a galaxy reaching a virial mass of solar mass at by carrying out a zoomed radiation-hydrodynamical cosmological simulation. This sim…
Cosmological Impact of Population III Binaries
Ke-Jung Chen, Volker Bromm, Alexander Heger +2
We present the results of the stellar feedback from Pop III binaries by employing improved, more realistic Pop III evolutionary stellar models. To facilitate a meaningful compariso…