#metallicity
5 papers · 1 filter
An Optical Illusion: High Electron Densities Create Extremely Metal-Poor Galaxy Impostors
Tiger Yu-Yang Hsiao, Danielle A. Berg, Steven L. Finkelstein +8
The study shows that some galaxies appear extremely metal-poor when analyzed with low-density assumptions, but accounting for their very high electron densities reveals higher true…
Stellar Multiplicity in Open Clusters: Investigating Binary Fractions and Their Relationship with Cluster Properties
Ruan P. Alves, Hektor Monteiro, Wilton S. Dias +1
The paper analyzes binary star fractions and mass‑ratio distributions in 773 open clusters, showing that binary fractions depend on metallicity but not age, and that binaries tend…
A Unified Framework Connecting Chemical Enrichment to Resolved Star Formation Histories with Applications to Local Group Dwarf Irregulars
Christopher T. Garling, Alex M. Garcia, Niusha Ahvazi +4
The paper introduces a framework that combines resolved star formation histories with chemical evolution models to trace the metallicity growth of dwarf galaxies, and applies it to…
Galaxy mergers drive enhancements in ionization states
A. Le Reste, K. B. Mantha
The study uses SDSS data to show that galaxy mergers progressively increase the O32 ionization line ratio, especially after coalescence, with low‑mass merging systems exhibiting th…
Constraints on the Metallicity-dependent Explodability of Massive Stars from Galactic Chemical Evolution: Toward Alleviating the Red Supergiant Problem
Sojun Ono, Keiichi Maeda, Akihiro Suzuki
The authors integrate metallicity‑dependent massive‑star explodability prescriptions into galactic chemical evolution models, showing they reproduce observed elemental abundances a…