ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Takashi Moriya (IPMU)
Title: Supernova Explosions in Dense Circumstellar Medium
Date: Thu, Apr 21, 2011, 13:00 - 14:30
Place: Seminar Room A
Related File: 450.pdf
Abstract: Massive stars which are 10 times heavier than the Sun explode when they have exhausted the available nuclear energy they can use to support themselves. Those explosions are observed as supernovae.
During the evolution of massive stars which eventually explode, they lose their mass because of radiation pressure or dynamical
instabilities or many other mechanisms. If many materials lost during stellar evolution remain around a massive star at the time of its explosion, the ejecta of the supernova collides to the surrounding materials (circumstellar medium, CSM) and the observed supernova is sometimes strongly affected by the CSM.
In this talk, I will show the effect of CSM on light curves of supernovae based on numerical radiation hydrodynamics.
Especially, I will focus on supernovae form red supergiants whose light curves are affected by CSM. I will also briefly discuss luminous supernovae from the CSM interaction and what we can do by observing them with Subaru/HSC survey.