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- W4226282034 abstract "Short gamma-ray bursts are believed to be produced by both binary neutron star (BNS) and neutron star-black hole (NSBH) mergers. We use current estimates for the BNS and NSBH merger rates to calculate the fraction of observable short gamma-ray bursts produced through each channel. This allows us to constrain merger rates of BNS to $mathcal{R}_{rm{BNS}}=384^{+431}_{-213}{rm{Gpc}^{-3} rm{yr}^{-1}}$ ($90%$ credible interval), a $16%$ decrease in the rate uncertainties from the second LIGO--Virgo Gravitational-Wave Transient Catalog, GWTC-2. Assuming a top-hat emission profile with a large Lorentz factor, we constrain the average opening angle of gamma-ray burst jets produced in BNS mergers to $approx 15^circ$. We also measure the fraction of BNS and NSBH mergers that produce an observable short gamma-ray burst to be $0.02^{+0.02}_{-0.01}$ and $0.01 pm 0.01$, respectively and find that $gtrsim 40%$ of BNS mergers launch jets (90% confidence). We forecast constraints for future gravitational-wave detections given different modelling assumptions, including the possibility that BNS and NSBH jets are different. With $24$ BNS and $55$ NSBH observations, expected within six months of the LIGO-Virgo-KAGRA network operating at design sensitivity, it will be possible to constrain the fraction of BNS and NSBH mergers that launch jets with $10%$ precision. Within a year of observations, we can determine whether the jets launched in NSBH mergers have a different structure than those launched in BNS mergers and rule out whether $gtrsim 80%$ of binary neutron star mergers launch jets. We discuss the implications of future constraints on understanding the physics of short gamma-ray bursts and binary evolution." @default.
- W4226282034 created "2022-05-05" @default.
- W4226282034 creator A5000557016 @default.
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- W4226282034 creator A5010652263 @default.
- W4226282034 creator A5012121924 @default.
- W4226282034 creator A5088976307 @default.
- W4226282034 creator A5091872255 @default.
- W4226282034 date "2022-04-12" @default.
- W4226282034 modified "2023-10-14" @default.
- W4226282034 title "Linking the rates of neutron star binaries and short gamma-ray bursts" @default.
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