Jeonghee Rho
SETI Institute, Mountain View, CA
Near-Infrared to JWST Observations of Supernovae and Their Remnants: Molecule and Dust Formation
The large quantities of dust observed in high-redshift galaxies raise questions about its origin, especially in environments where intermediate-mass stars are absent but core-collapse supernovae (SNe) occur. Carbon monoxide (CO) is one of the most efficient coolants, playing a critical role in dust formation. In this talk, I will present detections of CO and dust from several SNe and a supernova remnant (SNR) based on near-infrared (NIR) and mid-infrared (MIR) spectra obtained with Gemini and JWST. Multiple CO detections in the Gemini NIR spectra include several Type IIP, Ic, and Ib/IIb SNe. I will review the timescales and physical conditions of CO and dust formation across various SN types, considering factors such as progenitor mass, mass-loss rate, and nickel mass.