364 citations · 2k across the 41 of their papers we have counts for
9 papers · 1 filter
Gamma-Ray Light Curves and Spectra of Classical Novae
Shing-Chi Leung, Thomas Siegert
The nucleosynthesis in classical novae, in particular that of radioactive isotopes, is directly measurable by its -ray signature. Despite decades of observations, MeV -rays f…
Hydrodynamic Simulations of Electron-capture Supernovae: Progenitor and Dimension Dependence
Shuai Zha, Evan P. O'Connor, Sean M. Couch +2
We present neutrino-transport hydrodynamic simulations of electron-capture supernovae (ECSNe) in \texttt{FLASH} with new two-dimensional (2D) collapsing progenitor models. These pr…
Type Ia Supernovae and their Explosive Nucleosynthesis: Constraints on Progenitors
Shing-Chi Leung, Ken'ichi Nomoto
What the progenitors of Type Ia supernovae (SNe Ia) are, whether they are near-Chandrasekhar mass or sub-Chandrasekhar mass white dwarfs, has been the matter of debate for decades.…
Dark Matter-admixed Rotating White Dwarfs as Peculiar Compact Objects
H-S. Chan, M-C. Chu, S-C. Leung
The discoveries of anomalous compact objects challenge our understanding of the standard theory of stellar structures and evolution. They serve as an excellent laboratory to search…
Spatially Resolved X-ray Study of Supernova Remnant G306.30.9 with Unusually High Calcium Abundance
Jianbin Weng, Ping Zhou, Yang Chen +6
G306.30.9 is an asymmetric Galactic supernova remnant (SNR), whose progenitor has been thought to be a Type Ia supernova (SN), but its high Ca abundance appears inconsistent wit…
Wave-driven mass loss of stripped envelope massive stars: progenitor-dependence, mass ejection, and supernovae
Shing-Chi Leung, Samantha Wu, Jim Fuller
The discovery of rapidly rising and fading supernovae powered by circumstellar interaction has suggested the pre-supernova mass eruption phase as a critical phenomenon in massive s…
Origin of metals in old Milky Way halo stars based on GALAH and Gaia
Miho N. Ishigaki, Tilman Hartwig, Yuta Tarumi +6
Stellar and supernova nucleosynthesis in the first few billion years of the cosmic history have set the scene for early structure formation in the Universe, while little is known a…
Discovery of the Highly-Neutronized Ejecta Clump with Enhanced Abundances of Titanium and Chromium in the Type Ia Supernova Remnant 3C 397
Yuken Ohshiro, Hiroya Yamaguchi, Shing-Chi Leung +7
The supernova remnant (SNR) 3C 397 is thought to originate from a Type Ia supernova (SN Ia) explosion of a near-Chandrasekhar-mass () progenitor, based on the enhanced…
Fast Blue Optical Transients due to Circumstellar Interaction and the Mysterious Supernova SN 2018gep
Shing-Chi Leung, Jim Fuller, Ken'ichi Nomoto
The discovery of SN 2018gep (ZTF18abukavn) challenged our understanding of the late-phase evolution of massive stars and their supernovae (SNe). The fast rise in luminosity of this…