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Bridging between type IIb and Ib supernovae: SN IIb 2022crv with a very thin Hydrogen envelope
Anjasha Gangopadhyay, Keiichi Maeda, Avinash Singh +26
We present optical, near-infrared, and radio observations of supernova (SN) SN~IIb 2022crv. We show that it retained a very thin H envelope and transitioned from a SN~IIb to a SN~I…
Unprecedented early flux excess in the hybrid 02es-like type Ia supernova 2022ywc indicates interaction with circumstellar material
Shubham Srivastav, T. Moore, M. Nicholl +20
We present optical photometric and spectroscopic observations of the 02es-like type Ia supernova (SN) 2022ywc. The transient occurred in the outskirts of an elliptical host galaxy…
Constraint on the event rate of general relativistic instability supernovae from the early JWST deep field data
Takashi J. Moriya, Yuichi Harikane, Akio K. Inoue
General relativistic instability supernovae at ~10 < z < ~15 are predicted to be observed as red faint point sources, and they can be detected only in the reddest filters in JWST/N…
On the nature of slowly rising interaction-powered supernovae
Takashi J. Moriya
Some interaction-powered supernovae have long rise times of more than 100 days. We show that such long rise times are naturally expected if circumstellar matters (CSM) have a flat…
Enabling Kilonova Science with Nancy Grace Roman Space Telescope
Igor Andreoni, Michael W. Coughlin, Alexander W. Criswell +16
Binary neutron star mergers and neutron star-black hole mergers are multi-messenger sources that can be detected in gravitational waves and in electromagnetic radiation. The low el…
Roman CCS White Paper: Characterizing Superluminous Supernovae with Roman
Sebastian Gomez, Kate Alexander, Edo Berger +16
Type-I Superluminous Supernovae (SLSNe) are an exotic class of core-collapse SN (CCSN) that can be up to 100 times brighter and more slowly-evolving than normal CCSNe. SLSNe repres…
Roman CCS White Paper: Identifying high-redshift pair-instability supernovae by adding sparse F213 filter observations
Takashi Moriya, Ori D. Fox, Robert Quimby +22
Pair-instability supernovae (PISNe) are explosions of very massive stars that may have played a critical role in the chemical evolution and reionization of the early Universe. In o…
Environmental dependence of Type IIn supernova properties
Takashi J. Moriya, Lluis Galbany, Cristina Jimenez-Palau +9
Type IIn supernovae occur when stellar explosions are surrounded by dense hydrogen-rich circumstellar matter. The dense circumstellar matter is likely formed by extreme mass loss f…
Impacts of the reaction rate on nucleosynthesis in pair-instability supernovae
Hiroki Kawashimo, Ryo Sawada, Yudai Suwa +3
Nuclear reactions are key to our understanding of stellar evolution, particularly the rate, which is known to significantly influence the…
GREX-PLUS Science Book
PLUS Science Team, Akio K. Inoue, Yuichi Harikane +28
GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is a mission candidate for a JAXA's strategic L-class mission to be launched in the 2030s. Its primary…
Early excess emission in Type Ia supernovae from the interaction between supernova ejecta and their circumstellar wind
Takashi J. Moriya, Paolo A. Mazzali, Chris Ashall +1
The effects of the interaction between Type Ia supernova ejecta and their circumstellar wind on the photometric properties of Type Ia supernovae are investigated. We assume that a…
EMPRESS. XIV. Strong High Ionization Lines of Young Galaxies at : Ionizing Spectra Consistent with the Intermediate Mass Black Holes with
Shun Hatano, Masami Ouchi, Hiroya Umeda +16
We present ionizing spectra estimated at 13.6--100 eV for ten dwarf galaxies with strong high ionization lines of He {\sc {ii}}4686 and [Ne {\sc{v}}]3426 ([Ne {\sc{iv}}]24…
EMPRESS. XIII. Chemical Enrichments of Young Galaxies Near and Far at z ~ 0 and 4-10: Fe/O, Ar/O, S/O, and N/O Measurements with Chemical Evolution Model Comparisons
Kuria Watanabe, Masami Ouchi, Kimihiko Nakajima +14
We present gas-phase elemental abundance ratios of 7 local extremely metal-poor galaxies (EMPGs) including our new Keck/LRIS spectroscopy determinations together with 33 JWST $z\si…
Synthetic red supergiant explosion model grid for systematic characterization of Type II supernovae
Takashi J. Moriya, Bhagya M. Subrayan, Dan Milisavljevic +1
A new model grid containing 228,016 synthetic red supergiant explosions (Type II supernovae) is introduced. Time evolution of spectral energy distributions from 1 A to 50,000 A (10…
EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely-Metal Poor Galaxies
Yi Xu, Masami Ouchi, Yuki Isobe +49
We present demography of the dynamics and gas-mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of and low stellar masses of $10^4-…
Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae
Daichi Tsuna, Kohta Murase, Takashi J. Moriya
Early-time light curves/spectra of some hydrogen-rich supernovae (SNe) give firm evidence on the existence of confined, dense circumstellar matter (CSM) surrounding dying massive s…