Near-infrared and Optical Observations of Type Ic SN 2020oi and Broad-lined Type Ic SN 2020bvc: Carbon Monoxide, Dust, and High-velocity Supernova Ejecta

Published in The Astrophysical Journal, 2021

Recommended citation: Rho, Jeonghee; et al. (2021).

This paper presents data and analysis for SN Ic 2020oi and SN Ic-bl 2020bvc. NIR spectra for SN2020oi show clear CO emission, the first evidence of dust production from a SN Ic. SN2020oi may also show signs of Helium absorption. SN2020bvc exhibits extremely high ejecta velocities consistent with those measured for SNe Ic-bl associated with GRBs, indicating that the on-axis-unobserved GRB scenario may apply.