2010/06/06 by Matías Arrigoni, Scott C. Trager, Arrigoni, Matías +4 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1006.1147
8 pages, 6 figures, MNRAS submitted
openalex publication_date 2010/06/06 · arxiv created 2010/06/08 · arxiv updated 2010/06/09 · openalex created_date 2022/08/30 · openalex updated_date 2026/07/28
We use the cosmological semi-analytic model (SAM) for galaxy formation presented in Paper I to study the metallicities and abundance ratios of the intracluster medium (ICM) within the hierarchical structure formation paradigm. By requiring a slightly flat IMF (x=1.15) and a two-population delay-time-distribution (DTD) for SN Ia explosions we found previously that this model is able to reproduce the abundance ratios and supernova rates of early-type galaxies in the local Universe. Predictions for elemental abundances in the ICM pose a further test of the model. We find that with the fiducial model from Paper I the overall metal content of the ICM is too low, although the abundance ratios are in good agreement with the data. However, we find that allowing a fraction of the metal-enriched material ejected by stars to be deposited directly into the hot ICM, instead of being deposited into the cold ISM, appears to be a plausible and physically-motivated solution.