Supermassive black hole binaries are expected to produce a gravitational wave (GW) signal in the nano-Hertz frequency band which may be detected by Pulsar Timing Arrays (PTAs) in the coming years. The signal is composed of both stochastic and individually resolvable components. Here,we develop a generic Bayesianmethod for the analysis of resolvable sources based on the construction of 'null streams' which cancel the part of the signal held in common for each pulsar (the Earth term). For an array of N pulsars there are N - 2 independent null streams that cancel the GWsignal from a particular sky location. This method is applied to the localization of quasi-circular binaries undergoing adiabatic inspiral.We carry out a systematic investigation of the scaling of the localization accuracy with signal strength and number of pulsars in the PTA. Additionally, we find that source sky localization with the International PTA data release one is vastly superior than what is achieved by its constituent regional PTAs.

Goldstein, J., Veitch, J., Sesana, A., Vecchio, A. (2018). Null-stream analysis of Pulsar Timing Array data: Localization of resolvable gravitational wave sources. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 477(4), 5447-5459 [10.1093/mnras/sty892].

Null-stream analysis of Pulsar Timing Array data: Localization of resolvable gravitational wave sources

Sesana A.;
2018

Abstract

Supermassive black hole binaries are expected to produce a gravitational wave (GW) signal in the nano-Hertz frequency band which may be detected by Pulsar Timing Arrays (PTAs) in the coming years. The signal is composed of both stochastic and individually resolvable components. Here,we develop a generic Bayesianmethod for the analysis of resolvable sources based on the construction of 'null streams' which cancel the part of the signal held in common for each pulsar (the Earth term). For an array of N pulsars there are N - 2 independent null streams that cancel the GWsignal from a particular sky location. This method is applied to the localization of quasi-circular binaries undergoing adiabatic inspiral.We carry out a systematic investigation of the scaling of the localization accuracy with signal strength and number of pulsars in the PTA. Additionally, we find that source sky localization with the International PTA data release one is vastly superior than what is achieved by its constituent regional PTAs.
Articolo in rivista - Articolo scientifico
Black hole physics; Gravitational waves; Pulsars: general
English
2018
477
4
5447
5459
none
Goldstein, J., Veitch, J., Sesana, A., Vecchio, A. (2018). Null-stream analysis of Pulsar Timing Array data: Localization of resolvable gravitational wave sources. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 477(4), 5447-5459 [10.1093/mnras/sty892].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/290655
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