The impact of binary star yields on the spectra of galaxies

Abstract

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, CVs, 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.

15 pages, 5 figures, 4 tables, accepted for publication in MNRAS

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Cited by in corpus (4)

• Resolved photometry of extragalactic young massive star clusters
• Gravitational waves from mergers of Population III binary black holes: roles played by two evolution channels
• Uncertainties in the calibrations of star formation rate
• Using Binary Population Synthesis to Calculate the Yields of Low- and Intermediate-Mass Binary Populations at Low Metallicity