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- W2108196515 abstract "Coalescences of compact objects, neutron star and black holes, in binary systems are very promising sources of gravitational waves for the ground based detectors Advanced LIGO and Virgo. Much about compact binaries is still uncertain, including how often they are formed in the Universe, and some key details about their formation channels. One of the key open questions about compact binary coalescences is whether or not common envelope evolution is highly efficient in aligning spins with the orbital angular momentum. In this paper we show how gravitational waves detected by Advanced LIGO and Virgo can be used to verify if spins are preferentially aligned with the orbital angular momentum in compact binaries made of two black holes or a neutron star and a black hole. We first assume that all sources have either nearly aligned or non-aligned spins and use Bayesian model selection to calculate a cumulative odds ratio to compare the aligned and non-aligned models. We see that the correct model is typically preferred after one year of observation, at the realistic detection rate. We also simulate a situation where only a fraction of detected events have nearly aligned spins, and show how the mixture parameter can be estimated. We find that there exists a bias toward higher degrees of alignment and that this bias is larger for black hole binaries." @default.
- W2108196515 created "2016-06-24" @default.
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- W2108196515 date "2015-03-14" @default.
- W2108196515 modified "2023-09-27" @default.
- W2108196515 title "Use of gravitational waves to measure alignment of spins in compact binaries" @default.
- W2108196515 hasPublicationYear "2015" @default.
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