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Parameter estimation of neutron star-black hole binaries using an advanced gravitational-wave detector network: Effects of the full post-Newtonian waveform
H. Tagoshi, , A. Pai, K.G. Arun
Published in American Physical Society
Volume: 90
Issue: 2
We investigate the effects of using the full waveform (FWF) over the conventional restricted waveform of the inspiral signal from a coalescing compact binary system in extracting the parameters of the source, using a global network of second generation interferometric detectors. We study a hypothetical population of (1.4-10)M? neutron star-black hole binaries (uniformly distributed and oriented in the sky) by employing the full post-Newtonian waveforms, which not only include contributions from various harmonics other than the dominant one (quadrupolar mode) but also the post-Newtonian amplitude corrections associated with each harmonic, of the inspiral signal expected from this system. It is expected that the GW detector network consisting of the two LIGO detectors and a Virgo detector will be joined by KAGRA (a Japanese detector) and by proposed LIGO-India. We study the problem of parameter estimation with all 16 possible detector configurations. Comparing medians of error distributions obtained using FWFs with those obtained using restricted waveforms (which only include contributions from the dominant harmonic with Newtonian amplitude) we find that the measurement accuracies for luminosity distance and the cosine of the inclination angle improve almost by a factor of 1.5-2 depending upon the network under consideration. We find that this improvement can be attributed to the presence of additional inclination angle dependent terms, which appear in the amplitude corrections to various harmonics, which break the strong degeneracy between the luminosity distance and inclination angle. Although the use of FWF does not improve the source localization accuracy much, the global network consisting of five detectors will improve the source localization accuracy by a factor of 4 as compared to the estimates using a three-detector LIGO-Virgo network for the same waveform model. © 2014 American Physical Society.
About the journal
JournalData powered by TypesetPhysical Review D - Particles, Fields, Gravitation and Cosmology
PublisherData powered by TypesetAmerican Physical Society