Pulsar Timing Perturbations from Galactic Gravitational Wave Bursts with Memory

Abstract

Pulsar timing arrays (PTAs) are used to search for long-wavelength gravitational waves (GWs) by monitoring a set of spin-stable millisecond pulsars. Most theoretical analyses assume that the relevant GW sources are much more distant from Earth than the pulsars comprising the array. Unlike ground- or solar system-based GW detectors, PTAs might well contain embedded GW sources. We derive the PTA response from sources at any distance, with a specific focus on GW bursts with memory (BWMs). We consider supernovae and compact binary mergers as potential Galactic BWM sources and evaluate the signature for an array with pulsars in globular clusters or in the Galactic center. Understanding the response of PTAs to nearby sources of BWM is a step towards investigating other more complex Galactic sources.

14 pages, 7 figures, submitted to PRD

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• The NANOGrav 11-Year Data Set: Limits on Gravitational Wave Memory
• Persistent Astrometric Deflections from Gravitational-Wave Memory
• Correlated timing noise and high precision pulsar timing: Measuring frequency second derivatives as an example
• Detecting Gravitational Scattering of Interstellar Objects Using Pulsar Timing
• Gravitational Waves, Extreme Astrophysics, and Fundamental Physics with Precision Pulsar Timing
• Detailed study of detection method for ultra-low-frequency gravitational waves with pulsar spin-down rate statistics