Abstract Type Ia supernovae (SNe Ia) play a key role in the fields of astrophysics and
cosmology. It is widely accepted that SNe Ia arise from thermonuclear explosions of white …

SN 2021aefx is a normal Type Ia supernova (SN) showing excess emission and redward
color evolution over the first∼ 2 days. We present analyses of this SN using our high …

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 …

We present observations of SN 2022joj, a peculiar Type Ia supernova discovered by the
Zwicky Transient Facility. SN 2022joj exhibits an unusually red g ZTF− r ZTF color at early …

We present very early photometric and spectroscopic observations of the Type Ia supernova
(SN Ia) 2023bee, starting about 8 hr after the explosion, which reveal a strong excess in the …

We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an
underluminous fast-declining Type Ia supernova (SN Ia) in NGC 1784 (D≈ 31 Mpc), from< 1 …

Early observations of transient explosions can provide vital clues to their progenitor origins.
In this paper, we present the nearby Type Iax (02cx-like) supernova (SN), SN 2020udy, that …

We present the discovery of 48 new and the analysis of 55, including seven previously
discovered dwarf galaxy candidates (DGCs) around the giant spiral galaxy NGC 2997 using …

The detonation of a thin (≲ 0.03 M⊙) helium shell (He-shell) atop a∼ 1 M⊙ white dwarf
(WD) is a promising mechanism to explain normal Type Ia supernovae (SNe Ia), while …

I present a review of how late observations of supernovae, of the nebular phase, and much
later of supernova remnants (SNRs), and their analysis in 2023 made progress towards …