Forward Modelling the O3(a+b) GW transient mass distributions with BPASS by varying compact remnant mass and SNe kick prescriptions

Abstract

We present forward modeling from the BPASS code suite of the population of observed gravitational wave (GW) transients reported by the LIGO/VIRGO consortium (LVC) during their third observing run, O3(a+b). Specifically, we predict the expected chirp mass and mass ratio distributions for GW transients, taking account of detector sensitivity to determine how many events should have been detected by the current detector network in O3(a+b). We investigate how these predictions change by alternating between four different remnant mass estimation schemes and two supernovae (SNe) kick prescriptions. We find that none of the model populations resulting from these variations accurately match the whole O3(a+b) GW transient catalog. However, agreement from some models to part of the catalog suggests ways to achieve a more complete fit. These include reducing the number of low mass black holes (BHs) close to the mass gap, while also increasing the number of higher mass BHs below the pair-instability SN limit. Finally, we find that the interaction between the value of the remnant mass from a stellar model and the choice of SN kick is complex and different kick prescriptions may be required depending on whether a neutron star or BH is formed.

9 pages, 9 figures, 1 Table, Accepted by MNRAS

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• New constraints on the Bray conservation-of-momentum natal kick model from multiple distinct observations
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• VFTS 243 as predicted by the BPASS fiducial models
• Evaluating the gravitational wave detectability of globular clusters and the Magellanic Clouds for LISA
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• Gravitational wave energy spectral density properties from BPASS Galactic binary population in the Milky Way galaxy
• Estimating Transient Rates from Cosmological Simulations and BPASS