We present ultraviolet/optical/near-infrared observations and modeling of Type II
supernovae (SNe II) whose early time (δt< 2 days) spectra show transient, narrow emission …

Supernova (SN) 1987A is the nearest supernova in∼ 400 yr. Using the JWST MIRI Medium
Resolution Spectrograph, we spatially resolved the ejecta, equatorial ring (ER), and outer …

Dust-obscured star formation has dominated the cosmic history of star formation, since z≃ 4.
However, the recent finding of significant amount of dust in galaxies out to z≃ 8 has opened …

Abstract We present the Keck Infrared Transient Survey, a NASA Key Strategic Mission
Support program to obtain near-infrared (NIR) spectra of astrophysical transients of all types …

The existence of a secondary (in addition to compact object mergers) source of heavy
element (r-process) nucleosynthesis, the core-collapse of rapidly rotating and highly …

Large dust reservoirs (up to approximately 108 M⊙) have been detected,–in galaxies out to
redshift z≃ 8, when the age of the Universe was only about 600 Myr. Generating substantial …

Abstract We present JWST NIRCam (F356W and F444W filters) and MIRI (F770W) images
and NIRSpec Integral Field Unit (IFU) spectroscopy of the young Galactic supernova …

We present mid-infrared (mid-IR) imaging of the Type IIL supernova (SN) 1980K with the
JWST more than 40 yr post-explosion. SN 1980K, located in the nearby (D≈ 7 Mpc)'SN …

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 …

IRAS 15099-5856 in the young supernova remnant (SNR) MSH 15− 52 is the first and only
SNR-associated object with crystalline silicate dust detected so far, although its nature and …