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	パルサータイミングアレイ	回転曲線解析
分野	天文学	天文学
系統	Process / pipeline	Process / pipeline
提唱年	1979	1970
提唱者	Stephen Detweiler	Vera Rubin
種類	Observational timing method	Observational kinematic method
原典	Sazhin, M. V. (1978). Opportunities for detecting ultralong gravitational waves. Soviet Astronomy, 22, 36-38.	Vera C. Rubin & W. Kent Ford Jr. (1970). Rotation of the Andromeda Nebula from a Spectroscopic Survey of Emission Regions. Astrophysical Journal, 159, 379-403.
別名	PTA, Millisecond Pulsar Timing, Pulsar Timing Residuals	Galactic Rotation Curves, Rotation Curve Method, Velocity Curve Analysis
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.	Galaxy rotation curve analysis is the technique of measuring how orbital velocities change with distance from the center of a galaxy. Pioneered by Vera Rubin and W. Kent Ford Jr. in 1970, rotation curves revealed one of astronomy's great mysteries: galaxies rotate too fast to be held together by their visible stars alone, providing direct evidence for dark matter.