Impact of Aspherical Supernova Explosions on the Galactic Enrichment Process

Collapsars are a form of supernova that refer to rapidly rotating massive stars that collapse into black holes. The rapidly rotating black hole can trigger a high energy jet that penetrates the infalling envelope. The breakthrough of the collimated jet on the star surface is believed to be the origin of the observed long gamma-ray burst. This results in a highly aspherical explosion, leading to unique thermodynamical trajectories and large scale mixing of burnt-unburned material in the ejecta. It is suspected that this explosion channel could describe the production of particular Si- and Fe-group elements. In this talk we present new collapsar models evolved from realistic massive star models and discuss their chemical abundance patterns. We add this channel to the existing Galactic Chemical Evolution (GCE) code [1] to investigate its impact on the chemical enrichment process in the galactic scale. We compare the results with observational data from the Milky Way and Perseus Cluster. We will also discuss its implication on the supernova rates and some Zn-enriched metal poor stars.