ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Yuu Niino (Kyoto Univ.)
Title: Modeling GRB Host Galaxies
Date (JST): Thu, Jul 23, 2009, 13:30 - 14:30
Place: Seminar Room at IPMU Prefab. B
Related File: 119.pdf
Abstract: Association of some observed long GRBs with energetic type Ic supernovae (SNe) is considered to be an observational evidence that long GRBs originate from core-collapses (CCs) of very massive stars.
However, the occurrence rate of long GRBs is much lower than that of normal CC SNe, and the condition required for a GRB to occur from a CC still remains as one of the most outstanding questions about GRBs. Theoretical and observational studies suggest that GRBs preferentially occur in low-metallicity environment. Though observed properties of GRB host galaxies are important clues to investigate the required condition for a GRB to occur, direct measurement of the metallicity is difficult for most of the host galaxies.
In this talk, I will explain how to study the metallicity dependence by modeling the GRB host galaxies.