Conveners
Supernova and exotic transients
- Yen-Chen Pan (National Central University)
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Aiswarya Sankar Kachiprath (National Central University)5/15/26, 4:30 PMOral
We present a comprehensive analysis of the nearby Type-Ic superluminous supernova (SLSN) 2024ahr at a redshift of z = 0.086. The event exhibits an unusually high late-time 56Ni mass of ~5.5 M☉, derived from nebular spectral synthesis modeling, and shows notable similarities to SN 2007bi in both light curve evolution and spectroscopic properties. The light curve shows a pre-peak bump lasting...
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Sung-Han Tsai (ASIAA / NTU Department of Physics)5/15/26, 4:45 PMOral
Binary star interactions play a critical role in shaping the circumstellar medium (CSM) and influencing the observational properties of supernovae (SNe). This study focuses on the mass-loss processes in interacting binary stars with solar-like metallicity, particularly in the Case C systems where mass transfer occurs during the donor star's secondary expansion phase, which follows helium...
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Chang-Mao Yang (NTHU)5/15/26, 5:00 PMOral
Chiral effects induced by quantum anomalies, such as the chiral magnetic effect, are expected to influence the dynamics of core-collapse supernovae (CCSN). These effects arise in strong magnetic fields and rapid flows, which are common in supernova cores. In this work, we investigate the dynamical relevance of chiral neutrino radiation transport in CCSN, focusing on near-equilibrium...
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Yo-Yo Chu5/15/26, 5:15 PMOral
Identifying the progenitors of rapidly rotating core-collapse supernovae (CCSNe) is crucial for understanding the formation of magnetars and the origin of long gamma-ray bursts. In this study, we investigated the evolution of mass-transferring binary systems in a low-metallicity environment ($Z = 10^{-3}$) using the MESA stellar evolution code. We explored a parameter space with initial mass...
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Cheng-Han Lai (Institute of Astronomy, National Central University)5/15/26, 5:30 PMOral
The progenitor systems and explosion mechanisms of Type Ia supernovae (SNe Ia) are not yet fully understood. We aim to constrain them by analyzing the properties of their host galaxies, from which we can infer key information about the progenitors. In this study, we analyze the maximum light spectra of SNe Ia using data from ePESSTO+ from 2019 to 2023. We investigate the relationship between...
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Anirban Dutta (National Central University)5/15/26, 5:45 PMOral
The community has reached a consensus that thermonuclear supernovae are explosions of white dwarfs. But it is not known how an isolated white dwarf can explode. Most explosion scenarios involve white dwarfs in a binary to explain thermonuclear explosions. But the exact nature of the companion star, and the explosion mechanisms are not well understood. White dwarf supernovae are also important...
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44. Tracing Progenitor and Explosion Properties of Type Ia Supernovae with Swift Ultraviolet SpectraSnehasish Bhattacharjee (National Central University)5/15/26, 6:00 PMOral
We investigate the ultraviolet (UV) spectral properties of a large sample of Type Ia supernovae (SNe~Ia) observed with the {\it Swift} UltraViolet and Optical Telescope (UVOT) grism. This sample is much larger than our previous works and includes more early-time UV spectra. We investigate how the UV emission relates to $\Delta m_{15}(B)$, host-galaxy properties, and ejecta characteristics. We...
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