2009/07/02 by A. E. Sansom, R. G. Izzard, Pierre Ocvirk +1
Physics and Astronomy · #Astronomical spectroscopy #Astronomy #Astrophysics #Binary number #Binary star #Common envelope #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Line (geometry) #Physics #Spectral line #Star formation #Stars #Stellar evolution #Stellar, planetary, and galactic studies #Supernova #White dwarf #astro-ph.CO #astro-ph.SR
paper · pdf · doi:10.1111/j.1365-2966.2009.15346.x
15 pages, 5 figures, 4 tables, accepted for publication in MNRAS
arxiv created 2009/07/02 · openalex publication_date 2009/08/25 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
One of the complexities in modelling integrated spectra of stellar populations is the effect of interacting binary stars besides Type Ia supernovae (SNeIa). These include common envelope systems, cataclysmic variables, novae, and are usually ignored in models predicting the chemistry and spectral absorption line strengths in galaxies. In this paper, predictions of chemical yields from populations of single and binary stars are incorporated into a galactic chemical evolution model to explore the significance of the effects of these other binary yields. Effects on spectral line strengths from different progenitor channels of SNeIa are also explored. Small systematic effects are found when the yields from binaries, other than SNeIa, are included, for a given star formation history. These effects are, at present, within the observational uncertainties on the line strengths. More serious differences can arise in considering different types of SNIa models, their rates and contributions.