手法を比較

	パルサータイミングアレイ	運動学的距離
分野	天文学	天文学
系統	Process / pipeline	Process / pipeline
提唱年	1979	1957
提唱者	Stephen Detweiler	Bert Westerhout
種類	Observational timing method	Kinematic measurement method
原典	Sazhin, M. V. (1978). Opportunities for detecting ultralong gravitational waves. Soviet Astronomy, 22, 36-38.	Reid, M. J., et al. (2014). Trigonometric parallaxes of high mass star forming regions: the structure and kinematics of the Milky Way. Astrophysical Journal, 783(2), 130.
別名	PTA, Millisecond Pulsar Timing, Pulsar Timing Residuals	Galactic Kinematic Distances, Rotation-Curve Distance, Kinematic Parallax
関連	3	3
概要	A pulsar timing array uses multiple millisecond pulsars as a distributed network of gravitational wave detectors across the galaxy. Proposed theoretically by Stephen Detweiler in 1979, this method exploits the extraordinary timing precision of pulsars to detect the subtle spacetime distortions caused by gravitational waves. In 2023, the first evidence for a stochastic background of gravitational waves was announced using pulsar timing arrays.	Kinematic distance is a method for estimating distances to objects in the Milky Way using their observed radial velocities and the known rotation curve of the Galaxy. Developed in the 1950s by Bert Westerhout and others, this technique enables distance determination to distant molecular clouds and masers without trigonometric parallax or individual object luminosities.