Projects per year
Abstract
Detection and parameter estimation of binary neutron star merger remnants can shed light on the physics of hot matter at supranuclear densities. Here we develop a fast, simple model that can generate gravitational waveforms, and show it can be used for both detection and parameter estimation of postmerger remnants. The model consists of three exponentially damped sinusoids with a linear frequencydrift term. We test the model against nine equalmass numericalrelativity simulations selected for emission of gravitational waves for ≳25 ms. The median fitting factors between the model waveforms and numericalrelativity simulations exceed 0.90. We detect remnants at a postmerger signaltonoise ratio of ≥7 using a Bayesfactor detection statistic with a threshold of 3000. We can constrain the primary postmerger frequency to ±1.21.4% at postmerger signaltonoise ratios of 15 with an increase in precision to ±0.20.3% for postmerger signaltonoise ratios of 50. The tidal coupling constant can be constrained to ±129% at postmerger signaltonoise ratios of 15, and ±5% at postmerger signaltonoise ratios of 50 using a hierarchical inference model.
Original language  English 

Article number  043011 
Number of pages  14 
Journal  Physical Review D 
Volume  102 
Issue number  4 
DOIs  
Publication status  Published  15 Aug 2020 

ARC Centre of Excellence for Gravitational Wave Discovery
Bailes, M., McClelland, D. E., Levin, Y., Blair, D. G., Scott, S. M., Ottaway, D. J., Melatos, A., Veitch, P. J., Wen, L., Shaddock, D. A., Slagmolen, B. J. J., Zhao, C., Evans, R. J., Ju, L., Galloway, D., Thrane, E., Hurley, J. R., Coward, D. M., Cooke, J., Couch, W., Hobbs, G. B., Reitze, D., Rowan, S., Cai, R., Adhikari, R. X., Danzmann, K., Mavalvala, N., Kulkarni, S. R., Kramer, M., Branchesi, M., Gehrels, N., Weinstein, A. J. R., Steeghs, D., Bock, D. & Lasky, P.
Monash University – Internal University Contribution, Monash University – Internal Department Contribution
1/01/17 → 31/03/24
Project: Research

The stars that should not exist
Australian Research Council (ARC)
28/08/19 → 31/12/22
Project: Research

Putting Einstein to the Test: Probing Gravity with Gravitational Waves
1/05/18 → 31/12/20
Project: Research