Using the COSMIC Population Synthesis Code to Investigate How Metallicity Affects the Rates of Interacting Binaries

2024/05/30 by Ayanah L. Cason, Cason, Ayanah L., Nicole Lloyd-Ronning +3
Chemistry · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #History and advancements in chemistry #Mass Spectrometry Techniques and Applications #Solar and Stellar Astrophysics (astro-ph.SR)

paper · pdf · doi:10.48550/arxiv.2405.20396

openalex publication_date 2024/05/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We use COSMIC, a galaxy population synthesis code, to investigate how metallicity affects the rate of formation of massive stars with a closely orbiting compact object companion, the suggested progenitors of radio loud long gamma-ray bursts. We present the evolution time of these systems at different metallicities, and how the formation rates of these systems are anti-correlated with metallicity. In particular, these systems occur about 10 times more frequently in at metallicities between Z = 2× 10^-4 and 2 × 10^-3, compared to those between Z = 2× 10^-3 and 2 × 10^-2. This work serves as a prerequisite to predicting the global rates of these systems as a function of redshift, ultimately giving crucial insight into our understanding of the progenitors of long gamma-ray bursts and their evolution over cosmic time.

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