The effects of host galaxy properties on merging compact binaries detectable by LIGO

Abstract

Cosmological simulations of galaxy formation can produce present-day galaxies with a large range of assembly and star formation histories. A detailed study of the metallicity evolution and star formation history of such simulations can assist in predicting LIGO-detectable compact object binary mergers. Recent simulations of compact binary evolution suggest the compact object merger rate depends sensitively on the progenitor's metallicity. Rare low-metallicity star formation during galaxy assembly can produce more detected compact binaries than typical star formation. Using detailed simulations of galaxy and chemical evolution, we determine how sensitively the compact binary populations of galaxies with similar present-day appearance depend on the details of their assembly. We also demonstrate by concrete example the extent to which dwarf galaxies overabundantly produce compact binary mergers, particularly binary black holes, relative to more massive galaxies. We discuss the implications for transient multimessenger astronomy with compact binary sources.

9 pages, re-submitted to MNRAS after responding to referee comments

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• Stellar-mass black holes in young massive and open stellar clusters and their role in gravitational-wave generation
• Stellar-mass black holes in young massive and open stellar clusters and their role in gravitational-wave generation II
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• The Diversity and Variability of Star Formation Histories in Models of Galaxy Evolution
• Host galaxies of merging compact objects: mass, star formation rate, metallicity and colours
• Relativistic Dynamics and Mass Exchange in Binary Black Hole Mini-Disks
• Host galaxy properties of mergers of stellar binary black holes and their implications for advanced LIGO gravitational wave sources
• The Heraklion Extragalactic Catalogue (HECATE): a value-added galaxy catalogue for multi-messenger astrophysics
• Evolution of Galaxy Star Formation and Metallicity: Impact on Double Compact Objects Mergers
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• Constraints on the contributions to the observed binary black hole population from individual evolutionary pathways in isolated binary evolution
• Cosmic archaeology with massive stellar black hole binaries
• Evolution of dwarf galaxies hosting GW150914-like events
• Target of Opportunity Observations Detectability of Kilonovae with WFST
• The Contribution Of Outer HI Disks To The Merging Binary Black Hole Population
• Using Galaxy Formation Simulations to optimise LIGO Follow-Up Observations
• Astro2020 Science White Paper: Radio Counterparts of Compact Object Mergers in the Era of Gravitational-Wave Astronomy