Noise in pulsar timing arrays

[摘要] To successfully detect gravitational waves with pulsar timing arrays, we need to have a comprehensive understanding of the physical origins and statistical characteristics of the noise in pulse arrival times and identify mitigation methods to reduce the noise. In this paper we will review radiometer noise, phase jitter noise and timing noise in the noise budget of pulsar timing and show various efforts used to reduce them. We will briefly discuss the results of an overall assessment of the components and physical causes of the timing residuals for millisecond pulsars in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav).

[发布机构] School of Physics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei Province; 430074, China^1;Center for Advanced Radio Astronomy, University of Texas at Brownsville, 1 West University Boulevard, Brownsville; TX; 78520, United States^2

[关键词] Arrival time;Millisecond pulsars;Mitigation methods;North American;Statistical characteristics;Timing noise