4.7 Article

Forecasting Pulsar Timing Array Sensitivity to Anisotropy in the Stochastic Gravitational Wave Background

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Astronomy & Astrophysics

The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background

J. Antoniadis et al.

Summary: In this study, we searched for an isotropic stochastic gravitational wave background using the second data release of the International Pulsar Timing Array. We found evidence for a spectrally similar low-frequency stochastic process and demonstrated that the combined international data set is more sensitive. Although no significant evidence of a gravitational-wave origin was found, future international data releases are expected to increase sensitivity and detection probability.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Article Astronomy & Astrophysics

Angular resolution of the search for anisotropic stochastic gravitational-wave background with terrestrial gravitational-wave detectors

Erik Floden et al.

Summary: In this study, an anisotropic search for the stochastic gravitational-wave background is conducted by decomposing the gravitational-wave sky into its spherical harmonics components. It is found that higher-order spherical harmonics can provide better localization of detected gravitational-wave sources compared to lower-order harmonics, contrary to the diffraction limit argument. The study also explores the impact of factors such as the number of detectors in the network, the frequency range of the search, and the regularization method of the covariance matrix on the ability to recover simulated gravitational-wave sources.

PHYSICAL REVIEW D (2022)

Article Astronomy & Astrophysics

Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: inferences in the stochastic gravitational-wave background search

S. Chen et al.

Summary: This study searched for a stochastic gravitational-wave background (GWB) using data from six radio millisecond pulsars, finding spectral properties consistent with theoretical predictions but lacking the required HD correlation for GWB detection. The most favored model was found to be common uncorrelated red noise, with the results being marginally influenced by Solar system ephemeris effects.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

Article Astronomy & Astrophysics

Astrophysics Milestones for Pulsar Timing Array Gravitational-wave Detection

Nihan S. Pol et al.

Summary: The NANOGrav Collaboration has found strong Bayesian evidence for a common-spectrum stochastic process in their 12.5 yr pulsar timing array data set, with median characteristic strain amplitude at periods of a year. Even though evidence for the quadrupolar Hellings & Downs interpulsar correlations, which are characteristic of gravitational-wave signals, was not yet significant. By injecting a wide range of stochastic gravitational-wave background (GWB) signals into the data set, three key milestones were quantified, including the expectation of robust evidence for an interpulsar-correlated GWB signal after 15-17 yr of data accumulation.

ASTROPHYSICAL JOURNAL LETTERS (2021)

Article Astronomy & Astrophysics

On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array

Boris Goncharov et al.

Summary: A nanohertz-frequency stochastic gravitational-wave background can be potentially detected through the precise timing of millisecond pulsars, revealing a common-spectrum component. Recent data supports the presence of a common-spectrum process, but analysis may suffer from model misspecification. Extensions and combinations of datasets will improve the prospects of identifying spatial correlations necessary for claiming a detection of the gravitational-wave background.

ASTROPHYSICAL JOURNAL LETTERS (2021)

Article Astronomy & Astrophysics

The CHIME Pulsar Project: System Overview

M. Amiri et al.

Summary: The digital pulsar observing system designed for CHIME allows for simultaneous observation of multiple radio pulsars and transient sources with accelerated computing and autonomous control. Through dynamic scheduling, the system can efficiently monitor a large number of positions at high observation frequencies, facilitating the monitoring of multiple celestial sources. This system enables an extensive science program focused on timing and searching experiments, powered by the current modes of data acquisition for CHIME/Pulsar.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2021)

Article Astronomy & Astrophysics

Mapping the gravitational-wave sky with LISA: a Bayesian spherical harmonic approach

Sharan Banagiri et al.

Summary: This paper presents a Bayesian algorithm to probe the angular distribution of stochastic gravitational-wave confusion noise with LISA, revealing important information about the distribution of sources on Galactic and extragalactic scales, their astrophysics, and their evolution. The technique developed for mapping the gravitational-wave foreground from Galactic white dwarfs using a simplified model is demonstrated through simulations and analysis.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

Article Astronomy & Astrophysics

Jointly setting upper limits on multiple components of an anisotropic stochastic gravitational-wave background

Jishnu Suresh et al.

Summary: With the increasing sensitivity of gravitational wave detectors, the chances of detecting a stochastic gravitational wave background are rising. Different astrophysical and cosmological processes may generate backgrounds with distinct spectral features and sky distributions. Efficient analysis methods can accurately separate and estimate different anisotropic backgrounds, but at the cost of increased variance.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs

R. Abbott et al.

Summary: This study conducted searches for anisotropic stochastic gravitational-wave backgrounds using data from Advanced LIGO and Virgo detectors, resulting in new upper limit constraints that significantly improve upon previous limits.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Common-spectrum process versus cross-correlation for gravitational-wave searches using pulsar timing arrays

Joseph D. Romano et al.

Summary: NANOGrav has reported strong statistical evidence for a common-spectrum red-noise process in their 12.5-year analysis, but there is currently little evidence for quadrupolar spatial correlations across pulsars in the array. They provide a back-of-the-envelope illustration for nonexperts to understand the results using a simple signal + noise model and frequentist statistics.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Insights into searches for anisotropies in the nanohertz gravitational-wave background

Yacine Ali-Haimoud et al.

Summary: In the coming years, pulsar timing arrays are expected to detect the stochastic gravitational-wave background produced by inspiraling supermassive black hole binaries, and potentially constrain exotic physics. Current research mainly focuses on the isotropic and anisotropic properties of the gravitational-wave background. By analyzing pulsar timing data, insights into optimal search strategies for anisotropies have been gained, as well as the sensitivity to such phenomena.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

Md F. Alam et al.

Summary: This study presents TOA measurements and timing models of 47 millisecond pulsars observed between 2004 and 2017. The data was collected at the Arecibo Observatory and the Green Bank Telescope by NANOGrav. The research includes narrowband analysis for calculating multiple TOAs within narrow radio-frequency bands.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2021)

Review Multidisciplinary Sciences

Array programming with NumPy

Charles R. Harris et al.

NATURE (2020)

Article Astronomy & Astrophysics

Fisher formalism for anisotropic gravitational-wave background searches with pulsar timing arrays

Yacine Ali-Haimoud et al.

PHYSICAL REVIEW D (2020)

Article Astronomy & Astrophysics

The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background

Zaven Arzoumanian et al.

ASTROPHYSICAL JOURNAL LETTERS (2020)

Article Astronomy & Astrophysics

Searching for anisotropy in the distribution of binary black hole mergers

Ethan Payne et al.

PHYSICAL REVIEW D (2020)

Article Astronomy & Astrophysics

The MeerKAT telescope as a pulsar facility: System verification and early science results from MeerTime

M. Bailes et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA (2020)

Review Astronomy & Astrophysics

The astrophysics of nanohertz gravitational waves

Sarah Burke-Spolaor et al.

ASTRONOMY AND ASTROPHYSICS REVIEW (2019)

Article Astronomy & Astrophysics

The International Pulsar Timing Array: second data release

B. B. P. Perera et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

Article Astronomy & Astrophysics

The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background

Z. Arzoumanian et al.

ASTROPHYSICAL JOURNAL (2018)

Review Physics, Particles & Fields

Detection methods for stochastic gravitational-wave backgrounds: a unified treatment

Joseph D. Romano et al.

LIVING REVIEWS IN RELATIVITY (2017)

Article Astronomy & Astrophysics

The gravitational wave background from massive black hole binaries in Illustris: spectral features and time to detection with pulsar timing arrays

Luke Zoltan Kelley et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

Article Astronomy & Astrophysics

A study of spatial correlations in pulsar timing array data

C. Tiburzi et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

Article Physics, Multidisciplinary

Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

S. R. Taylor et al.

PHYSICAL REVIEW LETTERS (2015)

Article Astronomy & Astrophysics

The European Pulsar Timing Array and the Large European Array for Pulsars

Michael Kramer et al.

CLASSICAL AND QUANTUM GRAVITY (2013)

Article Astronomy & Astrophysics

The Parkes Pulsar Timing Array

G. Hobbs

CLASSICAL AND QUANTUM GRAVITY (2013)

Article Astronomy & Astrophysics

The North American Nanohertz Observatory for Gravitational Waves

M. A. McLaughlin

CLASSICAL AND QUANTUM GRAVITY (2013)

Article Astronomy & Astrophysics

The stochastic background: scaling laws and time to detection for pulsar timing arrays

Xavier Siemens et al.

CLASSICAL AND QUANTUM GRAVITY (2013)

Article Astronomy & Astrophysics

Searching for anisotropic gravitational-wave backgrounds using pulsar timing arrays

Stephen R. Taylor et al.

PHYSICAL REVIEW D (2013)

Article Astronomy & Astrophysics

Characterizing gravitational wave stochastic background anisotropy with pulsar timing arrays

C. M. F. Mingarelli et al.

PHYSICAL REVIEW D (2013)

Article Astronomy & Astrophysics

Anisotropies in the gravitational-wave stochastic background

S. Oelmez et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2012)

Editorial Material Computer Science, Interdisciplinary Applications

Python for Scientists and Engineers

K. Jarrod Millman et al.

COMPUTING IN SCIENCE & ENGINEERING (2011)

Article Astronomy & Astrophysics

The International Pulsar Timing Array project: using pulsars as a gravitational wave detector

G. Hobbs et al.

CLASSICAL AND QUANTUM GRAVITY (2010)

Article Astronomy & Astrophysics

Gravitational-wave stochastic background from kinks and cusps on cosmic strings

S. Olmez et al.

PHYSICAL REVIEW D (2010)

Article Astronomy & Astrophysics

Optimal strategies for gravitational wave stochastic background searches in pulsar timing data

Melissa Anholm et al.

PHYSICAL REVIEW D (2009)

Article Computer Science, Interdisciplinary Applications

Python for scientific computing

Travis E. Oliphant

COMPUTING IN SCIENCE & ENGINEERING (2007)

Review Physics, Multidisciplinary

Relic gravitational waves and cosmology

LP Grishchuk

PHYSICS-USPEKHI (2005)

Article Astronomy & Astrophysics

Gravitational waves probe the coalescence rate of massive black hole binaries

AH Jaffe et al.

ASTROPHYSICAL JOURNAL (2003)