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How will our knowledge of short gamma-ray bursts affect the distance measurement of binary neutron stars?

Science China(Physics,Mechanics & Astronomy) 2022年第1期65卷 103-118页

作者： Minghui Du Lixin Xu Institute of Theoretical Physics School of PhysicsDalian University of TechnologyDalian 116024China

Gravitational waves from binary neutron stars associated with short gamma-ray bursts have drawn considerable attention due to their prospect in *** such events,the sky locations of sources can be pinpointed with techniques such as identifying the host ***,the cosmological applications of these events still suffer from the problem of degeneracy between luminosity distance and inclination *** address this issue,a technique was proposed in previous study,i.e.,using the collimation property of short gamma-ray *** on the observations,we assume that the cosine of inclination follows a Gaussian distribution,which may act as a prior in the Bayes analysis to break the *** paper investigates the effects of different Gaussian priors and detector configurations on distance measurement and cosmological *** first derive a simplified Fisher information matrix for demonstration,and then conduct quantitative analyses via *** varying the number of third-generation detectors and the scale of prior,we generate four catalogs of 1000 *** is shown that,in the same detecting period,a network of detectors can recognize more and farther events than a single ***,adopting tighter prior and employing multiple detectors both decrease the error of luminosity *** considered is the performance of a widely adopted formula in the error budget,which turns out to be a conservative choice in each *** for cosmological applications,for theΛCDM model,500,200,600,and 300 events are required for the four configurations to achieve 1%H;*** all 1000 events in each catalog,H;and?;can be constrained to(0.66%,0.37%,0.76%,0.49%),and(0.010,0.006,0.013,0.010),*** results of the Gaussian process also show that the gravitational wave standard siren can serve as a probe of cosmology at high redshifts.

关键词： gravitational wave binary neutron star short gamma-ray burst cosmology

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