193 citations · 1.1k across the 42 of their papers we have counts for
42 papers
Formation of Heavy Seed Black Holes and Little Red Dots-like Compact Clusters in Metal-enriched Star-forming Regions
Sunmyon Chon, Shingo Hirano, Ke-Jung Chen +1
The origin of supermassive black holes (SMBHs) in the early Universe remains uncertain. While the classical direct-collapse scenario requires pristine gas exposed to intense Lyman-…
Supernova feedback in porous photoionized Giant Molecular Clouds
Cheryl S. C. Lau, Ian A. Bonnell, Yueh-Ning Lee +1
We present a new suite of numerical simulations of Type II supernovae (SNe) detonating in Giant Molecular Clouds with a variety of density structures shaped by photoionization feed…
The Evolution of Population III and Extremely Metal-Poor Binary Stars
Sung-Han Tsai, Ke-Jung Chen, Daniel Whalen +2
Numerical simulations have now shown that Population III (Pop III) stars can form in binaries and small clusters and that these stars can be in close proximity to each other. If so…
The impact of effective matter mixing based on three-dimensional hydrodynamical models on the molecule formation in the ejecta of SN 1987A
Masaomi Ono, Takaya Nozawa, Shigehiro Nagataki +4
To investigate the impact of matter mixing on the formation of molecules in the ejecta of SN 1987A, time-dependent rate equations for chemical reactions are solved for one-zone and…
Clumpy Structures within the Turbulent Primordial Cloud
Ching-Yao Tang, Ke-Jung Chen
The primordial clouds in the mini-halos hatch the first generation stars of the universe, which play a crucial role in cosmic evolution. In this paper, we investigate how the turbu…
How Population III Supernovae Determined the Properties of the First Galaxies
Ke-Jung Chen, Ching-Yao Tang, Daniel J. Whalen +4
Massive Pop III stars can die as energetic supernovae that enrich the early universe with metals and determine the properties of the first galaxies. With masses of about Msu…
Rapid Growth of Galactic Supermassive Black Holes through Accreting Giant Molecular Clouds during Major Mergers of their Host Galaxies
Chi-Hong Lin, Ke-Jung Chen, Chorng-Yuan Hwang
Understanding the formation of the supermassive black holes (SMBHs) present in the centers of galaxies is a crucial topic in modern astrophysics. Observations have detected the SMB…
Magnetic Fields in Primordial Galaxies
Huai-Hsuan Chiu, Ke-Jung Chen
Magnetic fields play a vital role in numerous astrophysical processes such as star formation and the interstellar medium. In particular, their role in the formation and evolution o…
Progress in Nuclear Astrophysics of East and Southeast Asia
Azni Abdul Aziz, Nor Sofiah Ahmad, S. Ahn +25
Nuclear astrophysics is an interdisciplinary research field of nuclear physics and astrophysics, seeking for the answer to a question, how to understand the evolution of the Univer…
Physics of Superluminous Supernovae
Ke-Jung Chen
Understanding how massive stars die as supernovae is a crucial question in modern astrophysics. Supernovae are powerful stellar explosions and key drivers in the cosmic baryonic cy…
Observational properties of a general relativistic instability supernova from a primordial supermassive star
Takashi J. Moriya, Ke-Jung Chen, Kimihiko Nakajima +2
We present the expected observational properties of a general relativistic instability supernova (GRSN) from the 55,500 Msun primordial (Population III) star. Supermassive stars ex…
How the Population III Initial Mass Function Governs the Properties of the First Galaxies
Li-Hsin Chen, Ke-Jung Chen, Sung-han Tsai +1
The properties of Population III (Pop III) stars impact many aspects of primeval structure formation such as the onset of cosmological reionization and early chemical enrichment. H…
Gas Dynamics of the Nickel-56 Decay Heating in Pair-Instability Supernovae
Ke-Jung Chen, S. E. Woosley, Daniel J. Whalen
Very massive 140-260 Msun stars can die as highly-energetic pair-instability supernovae (PI SNe) with energies of up to 100 times those of core-collapse SNe that can completely des…
Three-Dimensional Simulations of Magnetar-Powered Superluminous Supernovae
Ke-Jung Chen, S. E. Woosley, Daniel J. Whalen
A rapidly spinning magnetar in a young supernova (SN) can produce a superluminous transient by converting a fraction of its rotational energy into radiation. Here, we present the f…
Multidimensional Radiation Hydrodynamics Simulations of Pulsational Pair-Instability Supernovae
Ke-Jung Chen, Daniel J. Whalen, S. E. Woosley +1
Stars with masses of 80 - 130 Msun can encounter the pulsational pair-instability at the end of their lives, which triggers consecutive episodes of explosive burning that eject mul…
Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
Tyrone E. Woods, Bhaskar Agarwal, Volker Bromm +30
In recent years, the discovery of massive quasars at z~7 has provided a striking challenge to our understanding of the origin and growth of supermassive black holes in the early Un…
Fluid Instabilities of Magnetar-Powered Supernovae
Ke-Jung Chen
Magnetar-powered supernova explosions are competitive models for explaining very luminous optical transits. However, these explosion models were mainly calculated in 1D. Radiation…
Magnetar-Powered Supernovae in Two Dimensions. II. Broad-Line Supernovae Ic
Ke-Jung Chen, Takashi J. Moriya, Stan Woosley +4
Nascent neutron stars with millisecond periods and magnetic fields in excess of Gauss can drive highly energetic and asymmetric explosions known as magnetar-powered super…
How the First Stars Regulated Star Formation. II. Enrichment by Nearby Supernovae
Ke-Jung Chen, Daniel J. Whalen, Katharina M. J. Wollenberg +2
Metals from Population III (Pop III) supernovae led to the formation of less massive Pop II stars in the early universe, altering the course of evolution of primeval galaxies and c…
The third moment for the parabolic Anderson model
Le Chen
In this paper, we study the {\it parabolic Anderson model} starting from the Dirac delta initial data: \[ \left(\frac{\partial}{\partial t} -\fracν{2}\frac{\partial^2}{\partial x^2…
Magnetar-Powered Supernovae in Two Dimensions. I. Superluminous Supernovae
Ke-Jung Chen, S. E. Woosley, Tuguldur Sukhbold
Previous studies have shown that the radiation emitted by a rapidly rotating magnetar embedded in a young supernova can greatly amplify its luminosity. These one-dimensional studie…
Low-energy Population III supernovae and the origin of extremely metal-poor stars
Ke-Jung Chen, Alexander Heger, Daniel J. Whalen +3
Some ancient, dim, metal-poor stars may have formed in the ashes of the first supernovae (SNe). If their chemical abundances can be reconciled with the elemental yields of specific…
Pair-Instability Supernovae of Fast Rotating Stars
Ke-Jung Chen
We present 2D simulations of pair-instability supernovae considering rapid rotation during their explosion phases. Recent studies of the Pop III star formation suggested that these…
Finding the First Cosmic Explosions. IV. 90 - 140 M Pair-Instability Supernovae
Joseph Smidt, Daniel J. Whalen, E. Chatzopoulos +4
Population III stars that die as pair-instability supernovae are usually thought to fall in the mass range of 140 - 260 M. But several lines of work have now shown that r…