193 citations · 1.1k across the 42 of their papers we have counts for
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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…
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…
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…
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…
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…
Supernovae at the cosmic dawn
Ke-Jung Chen
Modern cosmological simulations predict that the first generation of stars formed with a mass scale around 100 solar masses about 300-400 million years after the Big Bang. When the…
Pair-Instability Supernovae of Non-Zero Metallicity Stars
Ke-Jung Chen, Alexander Heger, Stan Woosley +2
Observational evidence suggests that some very massive stars in the local Universe may die as pair-instability supernovae. We present 2D simulations of the pair-instability superno…
Pair Instability Supernovae of Very Massive Population III Stars
Ke-Jung Chen, Alexander Heger, Stan Woosley +2
Numerical studies of primordial star formation suggest that the first stars in the universe may have been very massive. Stellar models indicate that non-rotating Population III sta…
General Relativistic Instability Supernova of a Supermassive Population III Star
Ke-Jung Chen, Alexander Heger, Stan Woosley +3
The formation of supermassive Population III stars with masses 10,000 Msun in primeval galaxies in strong UV backgrounds at 15 may be the most viable pathway to…
Two-Dimensional Simulations of Pulsational Pair-Instability Supernovae
Ke-Jung Chen, Stan Woosley, Alexander Heger +2
Massive stars that end their lives with helium cores in the range of 35 to 65 Msun are known to produce repeated thermonuclear outbursts due to a recurring pair-instability. In som…
Pair-Instability Supernovae in the Local Universe
Daniel J. Whalen, Wesley Even, Joseph Smidt +7
The discovery of 150 - 300 M stars in the Local Group and pair-instability supernova candidates at low redshifts has excited interest in this exotic explosion mechanism.…
Numerical approaches for multidimensional simulations of stellar explosions
Ke-Jung Chen, Alexander Heger, Ann Almgren
We introduce numerical algorithms for initializing multidimensional simulations of stellar explosions with 1D stellar evolution models. The initial mapping from 1D profiles onto mu…
Conservative Initial Mapping For Multidimensional Simulations of Stellar Explosions
Ke-Jung Chen, Alexander Heger, Ann Almgren
Mapping one-dimensional stellar profiles onto multidimensional grids as initial conditions for hydrodynamics calculations can lead to numerical artifacts, one of the most severe of…
Multidimensional Simulations of Thermonuclear Supernovae from the First Stars
Ke-Jung Chen, Alexander Heger, Ann Almgren
Theoretical models suggest that the first stars in the universe could have been very massive, with typical masses 100 \Msun. Many of them might have died as energetic the…
Two Dimensional Simulations of Pair-Instability Supernovae
Ke-Jung Chen, Alexander Heger, Ann S. Almgren
We present preliminary results from two dimensional numerical studies of pair instability supernova (PSN). We study nuclear burning, hydrodynamic instabilities and explosion of ver…
Multi-Dimensional Simulations of Pair-Instability Supernovae
Ke-Jung Chen, Alexander Heger, Ann Almgren
We present preliminary results from multidimensional numerical studies of pair instability supernova (PSN), studying the fluid instabilities that occur in multiple spatial dimensio…