89 citations · 177 across the 13 of their papers we have counts for
15 papers
Observable Signatures of Supernova Shock Breakout in Confined Circumstellar Medium
Wun-Yi Chen, Ke-Jung Chen, Keiichi Maeda +1
Supernova shock breakout encodes rich information about stellar explosions, including the properties of the progenitor, the explosion mechanism, and the circumstellar environment.…
Interacting Binary Stars as Progenitors for Interacting Supernovae
Sung-Han Tsai, Ke-Jung Chen, Keiichi Maeda +2
Dense, compact circumstellar media (CSM) are required to power strongly interacting supernovae, yet their physical origin remains uncertain. We present a systematic study of binary…
Accurate Determination of Chemical Abundances near a Supermassive Black Hole
The XRISM collaboration
The metal abundances in galactic nuclei carry key information on the history of star formation and mass transfer in central regions of galaxies. X-ray fluorescence analysis is a un…
Multi-wavelength Signatures of Supernova Shock Breakout from Red Supergiants in Two Dimensions
Wun-Yi Chen, Ke-Jung Chen, Keiichi Maeda +3
We present new two-dimensional radiation hydrodynamic simulations of supernova shock breakout from red supergiants using the code. Our progenitors are 20 and 25 M…
Fading Echoes of Interaction: Probing Centuries of Preexplosion Mass-Loss in Four Type IIn Supernovae
Elizabeth Hillenkamp, Raphael Baer-Way, Poonam Chandra +6
Supernovae characterized by enduring narrow optical hydrogen emission lines (SNe IIn) are believed to result primarily from the core-collapse of massive stars undergoing sustained…
Formation of circumstellar material during double-white-dwarf mergers and the early excess emissions in Type Ia supernovae
Yusuke Inoue, Keiichi Maeda, Takashi Nagao +1
Early excess emission observed in Type Ia supernovae (SNe Ia) within day of explosion provides a critical window into their progenitor systems. In the present study, we inv…
Diversity in Hydrogen-rich Envelope Mass of Type II Supernovae. (III). The mass-loss and evolutionary pathways of the red supergiant progenitors
Qiliang Fang, Takashi J. Moriya, Keiichi Maeda +2
We present a comprehensive analysis of 32 type II supernovae (SNe II) with plateau phase photometry and late phase () spectroscopy available, aiming to bridge the gap betw…
Red Supergiant problem viewed from the nebular phase spectroscopy of type II supernovae
Qiliang Fang, Takashi J. Moriya, Keiichi Maeda
The red supergiant (RSG) problem refers to the observed dearth of luminous RSGs identified as progenitors of Type II supernovae (SNe II) in pre-SN imaging. Understanding this pheno…
Probing the Origin of the Star Formation Excess Discovered by JWST through Gamma-Ray Bursts
Tatsuya Matsumoto, Yuichi Harikane, Keiichi Maeda +1
The recent observations by the James Webb Space Telescope (JWST) have revealed a larger number of bright galaxies at than was expected. The origin of this excess is st…
Diversity in hydrogen-rich envelope mass of type II supernovae (II): SN 2023ixf as explosion of partially-stripped intermediate massive star
Qiliang Fang, Takashi J. Moriya, Lucía Ferrari +6
SN 2023ixf is one of the most well-observed core-collapse supernova in recent decades, yet there is inconsistency in the inferred zero-age-main-sequence (ZAMS) mass …
Diversity in hydrogen-rich envelope mass of type II supernovae (I): -band light curve modeling
Qiliang Fang, Keiichi Maeda, Haonan Ye +2
We present a systematic study of Type II supernovae (SNe II) originating from progenitors with effective temperatures () and luminosities closely resembling red superg…
Properties of gamma-ray decay lines in 3D core-collapse supernova models, with application to SN 1987A and Cas A
A. Jerkstrand, A. Wongwathanarat, H. -T. Janka +8
Comparison of theoretical line profiles to observations provides important tests for supernova explosion models. We study the shapes of radioactive decay lines predicted by current…
Sodium Absorption Systems toward SN Ia 2014J Originate on Interstellar Scales
K. Maeda, A. Tajitsu, K. S. Kawabata +21
Na I D absorbing systems toward Type Ia supernovae (SNe Ia) have been intensively studied over the last decade with the aim of finding circumstellar material (CSM), which is an ind…
The Broad-Lined Type Ic SN 2012ap and the Nature of Relativistic Supernovae Lacking a Gamma-ray Burst Detection
D. Milisavljevic, R. Margutti, J. T. Parrent +20
We present ultraviolet, optical, and near-infrared observations of SN 2012ap, a broad-lined Type Ic supernova in the galaxy NGC 1729 that produced a relativistic and rapidly decele…
Interaction Between The Broad-lined Type Ic Supernova 2012ap and Carriers of Diffuse Interstellar Bands
D. Milisavljevic, R. Margutti, K. N. Crabtree +18
The diffuse interstellar bands (DIBs) are absorption features observed in optical and near-infrared spectra that are thought to be associated with carbon-rich polyatomic molecules…