2020-05-21

UTAPwiki/セミナー/宇宙物理学セミナー

Speaker: Toshikazu Shigeyama

Title: Eruptive mass loss in the late evolutionary stage of massive stars

Abstract:
Recent high cadence observations for transient events have captured outbursts from massive stars prior to the final supernova explosions. The luminosity seemingly exceeding the Eddington limit suggests that the outburst results in eruptive mass loss from the progenitor star. Furthermore, the following supernova exhibits narrow emission lines in the spectrum, which are thought to originate from the dense circum-stellar matter. Some observations indicated very high mass loss rates of ~0.1 Msun/yr. I will review some examples of such observations and possible mechanisms to account for these eruptive mass loss events.