After hydrogen and helium, oxygen, carbon, and nitrogen—hereinafter, the CNO elements—
are the most abundant species in the universe. They are observed in all kinds of …

We present the discovery of the Type II supernova SN 2023ixf in M101 and follow-up
photometric and spectroscopic observations, respectively, in the first month and week of its …

We present UV and/or optical observations and models of SN 2023ixf, a type II supernova
(SN) located in Messier 101 at 6.9 Mpc. Early time (flash) spectroscopy of SN 2023ixf …

We present panchromatic observations and modeling of supernova (SN) 2020tlf, the first
normal Type II-P/L SN with confirmed precursor emission, as detected by the Young …

The hot and dense core formed in the collapse of a massive star is a powerful source of
hypothetical feebly interacting particles such as sterile neutrinos, dark photons, axionlike …

We present high-cadence photometric and spectroscopic observations of supernova (SN)
2024ggi, a Type II SN with flash spectroscopy features, which exploded in the nearby galaxy …

Nuclear weak rates in stellar environments are obtained by taking into account recent
advances in shell-model studies of spin-dependent excitation modes in nuclei including …

We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at
14.5 Mpc. This wealth of multiwavelength data allows us to compare different metrics …

SN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a
Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with …

We present a sample of Type Icn supernovae (SNe Icn), a newly discovered class of
transients characterized by their interaction with H-and He-poor circumstellar material …