Dear Astro-Lunchers,
Join us today at 11:30 am for AstroParticle Lunch! Today we will have Kanji Mori, who will tell us about his work on core-collapse supernovae and how axion-like particles can induce shock revival. He will also give value added at AstroCoffee one hour earlier. To accommodate his timezone, we will start 15 minutes before usual, at 11:30 am. We will keep the virtual format, with the following
Zoom link: https://osu.zoom.us/j/98472129011?pwd=VXl5OG1PUzh1YW1iekR2OXV4TDYxUT09
The title and abstract are below:
Shock Revival in Core-collapse Supernovae Assisted by Heavy Axion-like Particles
Axion-like particles (ALPs) are a class of hypothetical pseudoscalar particles that feebly interact with ordinary matter. The hot plasma of stars and core-collapse supernovae is a possible laboratory to explore physics beyond the standard model including ALPs. Once produced in a supernova, some of the ALPs can be absorbed by the supernova matter and affect energy transfer. We recently calculated the ALP emission in core-collapse supernovae and the backreaction on supernova dynamics consistently. It is found that the stalled bounce shock can be revived if the coupling between ALPs and photons is as high as $g_{a\gamma}\sim 10^{-9}$ GeV$^{-1}$ and the ALPmass is 40-400 MeV. If there is time, I will discuss how satellite galaxies are able to put constraints on decaying dark matter invoked to explain the S8 tension.