Systematic Astrometric Errors in Pulsar Timing

Gravitational Waves

10.1093/oso/9780198570899.001.0001 ◽

2018 ◽

Cited By ~ 33

Author(s):

Michele Maggiore

Keyword(s):

Black Hole ◽

Perturbation Theory ◽

Gravitational Waves ◽

Transfer Functions ◽

Normal Modes ◽

Cosmological Perturbation ◽

Tests Of General Relativity ◽

Pulsar Timing ◽

Tensor Perturbations ◽

Stochastic Backgrounds

A comprehensive and detailed account of the physics of gravitational waves and their role in astrophysics and cosmology. The part on astrophysical sources of gravitational waves includes chapters on GWs from supernovae, neutron stars (neutron star normal modes, CFS instability, r-modes), black-hole perturbation theory (Regge-Wheeler and Zerilli equations, Teukoslky equation for rotating BHs, quasi-normal modes) coalescing compact binaries (effective one-body formalism, numerical relativity), discovery of gravitational waves at the advanced LIGO interferometers (discoveries of GW150914, GW151226, tests of general relativity, astrophysical implications), supermassive black holes (supermassive black-hole binaries, EMRI, relevance for LISA and pulsar timing arrays). The part on gravitational waves and cosmology include discussions of FRW cosmology, cosmological perturbation theory (helicity decomposition, scalar and tensor perturbations, Bardeen variables, power spectra, transfer functions for scalar and tensor modes), the effects of GWs on the Cosmic Microwave Background (ISW effect, CMB polarization, E and B modes), inflation (amplification of vacuum fluctuations, quantum fields in curved space, generation of scalar and tensor perturbations, Mukhanov-Sasaki equation,reheating, preheating), stochastic backgrounds of cosmological origin (phase transitions, cosmic strings, alternatives to inflation, bounds on primordial GWs) and search of stochastic backgrounds with Pulsar Timing Arrays (PTA).

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Searching for gravitational-wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa3721 ◽

2020 ◽

Vol 501 (1) ◽

pp. 701-712

Author(s):

N Yonemaru ◽

S Kuroyanagi ◽

G Hobbs ◽

K Takahashi ◽

X-J Zhu ◽

...

Keyword(s):

False Alarm ◽

Gravitational Wave ◽

Cosmic String ◽

Cosmic Strings ◽

False Alarm Probability ◽

String Tension ◽

Detection Algorithm ◽

Pulsar Timing ◽

Upper Limits ◽

Pulsar Timing Array

ABSTRACT Cosmic strings are potential gravitational-wave (GW) sources that can be probed by pulsar timing arrays (PTAs). In this work we develop a detection algorithm for a GW burst from a cusp on a cosmic string, and apply it to Parkes PTA data. We find four events with a false alarm probability less than 1 per cent. However further investigation shows that all of these are likely to be spurious. As there are no convincing detections we place upper limits on the GW amplitude for different event durations. From these bounds we place limits on the cosmic string tension of Gμ ∼ 10−5, and highlight that this bound is independent from those obtained using other techniques. We discuss the physical implications of our results and the prospect of probing cosmic strings in the era of Square Kilometre Array.

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Ensemble Pulsar Time Study by Pulsar Timing Observations

Symposium - International Astronomical Union ◽

10.1017/s0074180900181604 ◽

2004 ◽

Vol 218 ◽

pp. 439-440

Author(s):

Tinggao Yang ◽

Guangren Ni

Keyword(s):

Time Scale ◽

Wavelet Decomposition ◽

Time Study ◽

Millisecond Pulsar ◽

Millisecond Pulsars ◽

Pulsar Time ◽

Pulsar Timing ◽

Timing Data ◽

Gravitational Wave Background

Long term timing of multiple millisecond pulsars can contribute to the study of an ensemble pulsar time scale PTens. A wavelet decomposition algorithm (WDA) was applied to define a PTens using the available millisecond pulsar timing datA. The PTens obtained from WDA is more stable than those resulting from other algorithms. The Chinese 50 m radio telescope is specially designed for PTens study and detection of gravitational wave background via millisecond pulsars timing observations. A scheme for multiple millisecond pulsar timing and ensemble pulsar time study is discussed in some detail.

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