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Inferencing Progenitor and Explosion Properties of Evolving Core-collapse Supernovae from Zwicky Transient Facility Light Curves
Bhagya M. Subrayan, Danny Milisavljevic, Takashi J. Moriya +9
We analyze a sample of 45 Type II supernovae from the Zwicky Transient Facility (ZTF) public survey using a grid of hydrodynamical models in order to assess whether theoretically-d…
A Multi-Wavelength View on the Rapidly-Evolving Supernova 2018ivc: An Analog of SN IIb 1993J but Powered Primarily by Circumstellar Interaction
Keiichi Maeda, Poonam Chandra, Takashi J. Moriya +15
SN 2018ivc is an unusual type II supernova (SN II). It is a variant of SNe IIL, which might represent a transitional case between SNe IIP with a massive H-rich envelope, and IIb wi…
A radio-detected Type Ia supernova with helium-rich circumstellar material
Erik C. Kool, Joel Johansson, Jesper Sollerman +34
Type Ia supernovae (SNe Ia) are thermonuclear explosions of degenerate white dwarf (WD) stars destabilized by mass accretion from a companion star, but the nature of their progenit…
Light Curves and Event Rates of Axion Instability Supernovae
Kanji Mori, Takashi J. Moriya, Tomoya Takiwaki +3
It was recently proposed that exotic particles can trigger a new stellar instability which is analogous to the e-e+ pair instability if they are produced and reach equilibrium in t…
The quest for new correlations in the realm of the Gamma-Ray Burst -- Supernova connection
M. G. Dainotti, B. De Simone, M. I. Khadir +5
Gamma-Ray Bursts (GRBs) are very energetic cosmological transients. Long GRBs are usually associated with Type Ib/c Supernovae (SNe), and we refer to them as GRB-SNe. Since the ass…
MUSSES2020J: The Earliest Discovery of a Fast Blue Ultraluminous Transient at Redshift 1.063
Ji-an Jiang, Naoki Yasuda, Keiichi Maeda +22
In this Letter, we report the discovery of an ultraluminous fast-evolving transient in rest-frame UV wavelengths, MUSSES2020J, soon after its occurrence by using the Hyper Suprime-…
EMPRESS. IX. Extremely Metal-Poor Galaxies are Very Gas-Rich Dispersion-Dominated Systems: Will JWST Witness Gaseous Turbulent High-z Primordial Galaxies?
Yuki Isobe, Masami Ouchi, Kimihiko Nakajima +49
We present kinematics of 6 local extremely metal-poor galaxies (EMPGs) with low metallicities () and low stellar masses (). Tak…
Mass loss of massive helium star supernova progenitors shortly before explosion constrained by supernova radio properties
Takashi J. Moriya, Sung-Chul Yoon
Mass loss of massive helium stars is not well understood even though it plays an essential role in determining their remnant neutron-star or black-hole masses as well as ejecta mas…
Constraints on Explosion Timescale of Core-Collapse Supernovae Based on Systematic Analysis of Light Curves
Sei Saito, Masaomi Tanaka, Ryo Sawada +1
Explosion mechanism of core-collapse supernovae is not fully understood yet. In this work, we give constraints on the explosion timescale based on Ni synthesized by supernov…
Long-term evolution of a supernova remnant hosting a double neutron star binary
Tomoki Matsuoka, Shiu-Hang Lee, Keiichi Maeda +2
An ultra-stripped supernova (USSN) is a type of core-collapse SN explosion proposed to be a candidate formation site of a double neutron star (DNS) binary. We investigate the dynam…
Euclid detectability of pair instability supernovae in binary population synthesis models consistent with merging binary black holes
Ataru Tanikawa, Takashi J. Moriya, Nozomu Tominaga +1
We infer the expected detection number of pair instability supernovae (PISNe) during the operation of the Euclid space telescope based on binary population models. Our models repro…
Euclid: Searching for pair-instability supernovae with the Deep Survey
T. J. Moriya, C. Inserra, M. Tanaka +106
Pair-instability supernovae are theorized supernovae that have not yet been observationally confirmed. They are predicted to exist in low-metallicity environments. Because overall…
EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension
Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima +42
The primordial He abundance is a powerful probe of cosmology. Currently, is best determined by observations of metal-poor galaxies, while there are on…
Variable thermal energy injection from magnetar spin down as a possible cause of stripped-envelope supernova light-curve bumps
Takashi J. Moriya, Kohta Murase, Kazumi Kashiyama +1
Luminosity evolution of some stripped-envelope supernovae such as Type I superluminous supernovae is difficult to be explained by the canonical 56Ni nuclear decay heating. A popula…
Statistical properties of the nebular spectra of 103 stripped envelope core collapse supernovae
Qiliang Fang, Keiichi Maeda, Hanindyo Kuncarayakti +6
We present an analysis of the nebular spectra of 103 stripped envelope (SE) supernovae (SNe) collected from the literature and observed with the Subaru Telescope from 2002 to 2012,…
Properties of Type Ibn Supernovae: Implications for the Progenitor Evolution and the Origin of a Population of Rapid Transients
Keiichi Maeda, Takashi J. Moriya
Type Ibn Supernovae (SNe Ibn) show signatures of strong interaction between the SN ejecta and hydrogen-poor circumstellar matter (CSM). Deriving the ejecta and CSM properties of SN…