What stars explode as supernovae type Ic?

Speacer: Prof. UAM dr hab. Michał Michałowski(Faculty of Physics and Astronomy, AMU Poznan, Poland)

Abstract: Supernova (SN) explosions are important for galaxy evolution because they enrich the interstellar medium with heavy elements and provide feedback, which can halt further star formation. These effects depend on what stellar progenitors explode as a given SN type. Type Ic SNe (without hydrogen or helium lines in their spectra) can be explosions of either ~10 solar mass stars in binary systems or very massive (>30 Msun) stars. These models involve very different lifetimes of the SN progenitors, so predict very different states of molecular gas around the explosion. Exploiting this, I will show that millimetre carbon monoxide observations of galaxies hosting SNe provide evidence for the binary model of type Ic SNe. This is an important distinction from the point of view of stellar evolution as well as the galaxy’s future star formation. This finding can be implemented in sub-grid prescriptions in numerical cosmological simulations to improve the feedback and chemical mixing.

Those who cannot participate in person can follow the talk using Microsoft Teams:
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