We present JWST near-infrared (NIR) and mid-infrared (MIR) spectroscopic observations of
the nearby normal Type Ia supernova (SN) SN 2021aefx in the nebular phase at+ 255 days …

Following our recent work on Type II supernovae (SNe), we present a set of 1D nonlocal
thermodynamic equilibrium radiative transfer calculations for nebular-phase Type Ibc SNe …

We present an in-depth study of the late-time near-infrared plateau in Type Ia supernovae
(SNe Ia), which occurs between 70 and 500 d. We double the existing sample of SNe Ia …

We present three new spectra of the nearby Type Ia supernova (SN Ia) 2011fe covering≈
480–850 days after maximum light and show that the ejecta undergoes a rapid ionization …

The observed diversity in Type Ia supernovae (SNe Ia)–the thermonuclear explosions of
carbon–oxygen white dwarf stars used as cosmological standard candles–is currently met …

Near-infrared (NIR) observations of normal Type Ia supernovae (SNe Ia) obtained between
150 and 500 d past maximum light reveal the existence of an extended plateau. Here, we …

ABSTRACT Type Ia supernovae (SNe Ia) play a crucial role as standardizable candles in
measurements of the Hubble constant and dark energy. Increasing evidence points towards …

We present extensive optical photometric and spectroscopic observations of the high-
velocity (HV) Type Ia supernova (SN Ia) 2017fgc, covering the phase from∼ 12 days before …

Strong gravitational magnification enables the detection of faint background sources and
allows researchers to resolve their internal structures and even identify individual stars in …

The Gamow Explorer will use Gamma Ray Bursts (GRBs) to: 1) probe the high redshift
universe (z< 6) when the first stars were born, galaxies formed and Hydrogen was reionized; …