A5014669619- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Statistical and numerical algorithms
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Seismic Imaging and Inversion Techniques
- Gamma-ray bursts and supernovae
- Hereditary Neurological Disorders
- Cosmology and Gravitation Theories
- Petroleum Processing and Analysis
- Adaptive optics and wavefront sensing
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Monoclonal and Polyclonal Antibodies Research
- Peripheral Neuropathies and Disorders
- Electrohydrodynamics and Fluid Dynamics
- Rheology and Fluid Dynamics Studies
University of Birmingham
2018-2020
Combustion Institute
1940
In this paper, we describe the International Pulsar Timing Array second data release, which includes recent pulsar timing obtained by three regional consortia: European Array, North American Nanohertz Observatory for Gravitational Waves, and Parkes Array. We analyse where possible combine high-precision 65 millisecond pulsars are regularly observed these groups. A basic noise analysis, including processes both correlated uncorrelated in time, provides models ephemerides pulsars. find that...
Thanks to the recent discoveries of gravitational wave signals from binary black hole mergers by Advanced Laser Interferometer Gravitational Wave Observatory and Virgo, genuinely strong-field dynamics spacetime can now be probed, allowing for stringent tests general relativity (GR). One set consists parametrized deformations away GR in template waveform models then constraining size deviations, as was done detected previous work. In this paper, we construct reduced-order quadratures so speed...
Abstract The population of Milky Way satellite galaxies is great interest for cosmology, fundamental physics, and astrophysics. They represent the faint end galaxy luminosity function, are most dark-matter-dominated objects in local universe, contain oldest metal-poor stellar populations. Recent surveys have revealed around 60 satellites, but this could less than half total. Characterization these systems remains a challenge due to their low luminosity. We consider gravitational-wave...
The label switching problem arises in the Bayesian analysis of models containing multiple indistinguishable parameters with arbitrary ordering. Any permutation these is equivalent, therefore many such have extremely multimodal posterior distributions. It difficult to sample efficiently from posteriors. This paper discusses a solution this which involves carefully mapping input parameter space high dimensional hypertriangle. demonstrated that efficient even for large numbers and can be easily...
We propose a novel methodology to select host galaxy candidates of future pulsar timing array (PTA) detections resolved gravitational waves (GWs) from massive black hole binaries (MBHBs). The method exploits the physical dependence GW amplitude on MBHB chirp mass and distance observer, together with empirical MBH mass-host correlations, rank potential galaxies in mass-redshift plane. This is coupled null-stream based likelihood evaluation sky position Bayesian framework that assigns each...
Super-massive black hole binaries are expected to produce a GW signal in the nano-Hertz frequency band which may be detected by PTAs coming years. The is composed of both stochastic and individually resolvable components. Here we develop generic Bayesian method for analysis sources based on construction `null-streams' cancel part held common each pulsar (the Earth-term). For an array $N$ pulsars there $N-2$ independent null-streams that from particular sky location. This applied localisation...