High-Energy Multimessenger Emissions from Supernovae and Gamma-Ray Bursts

Various classes of supernovae and gamma-ray bursts have been observed and of interest in light of multimessenger observations. Understanding the origin of the diversity among these transients is important to reveal the underlying physical mechanisms. Some of them are powered by shock interactions with a dense material and/or outflows from the central engine. We review high-energy neutrino and gamma-ray emissions from such interaction-powered or outflow-powered transients in view of the recent IceCube and Fermi data, and discuss how the multi-messenger emissions can be used as probes of particle acceleration in dense environments that cannot directly be seen by optical observations.