Impact of Primordial Black Hole Triggered Type Ia Supernova on Fe-group Element Production 

Dark matter (DM) is an important component for the large-scale structure formation in the universe. Primordial Black Holes (PBHs) are one possible type of dark matter candidate, and their existence could have consequential effects on galactic and cosmological evolution. When PBHs fall into white dwarfs (WDs), the gravity of the PBH induces tidal heating along its trajectory through the WD matter. The resulting hot spot may trigger unstable carbon burning, leading to explosions as Type Ia supernovae [1]. In this talk, we present new Type Ia supernova models assuming this explosion channel. We discuss their nucleosynthetic yields and compare them with observed supernovae. We also investigate the impact of this explosion channel on the galactic chemical enrichment process. By adding the chemical yields of these supernova models into the galactic chemical evolution code [2], we study how the evolution of Fe-group elements (e.g., Mn) can constrain this PBH-induced supernova mechanism. Finally, we discuss how these chemical elements could be further constrained by the observed supernova rates from ongoing and future surveys.