4 papers
What is Powering the Enigmatic He II Emitter Hebe: The First Stars or Black Holes?
Junehyoung Jeon, Tae Bong Jeong, Saiyang Zhang +1
Recent high-resolution spectroscopy with the James Webb Space Telescope (JWST) has confirmed the presence of a strong He II emitting clump in the vicinity of GN-z11,…
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…
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…
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…