Sammenlign metoder

	Rotasjonskurveanalyse	Pulsar Timing Array
Fagfelt	Astronomi	Astronomi
Familie	Process / pipeline	Process / pipeline
Opprinnelsesår	1970	1979
Opphavsperson	Vera Rubin	Stephen Detweiler
Type	Observational kinematic method	Observational timing method
Opprinnelig kilde	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.	Sazhin, M. V. (1978). Opportunities for detecting ultralong gravitational waves. Soviet Astronomy, 22, 36-38.
Alias	Galactic Rotation Curves, Rotation Curve Method, Velocity Curve Analysis	PTA, Millisecond Pulsar Timing, Pulsar Timing Residuals
Relaterte	3	3
Sammendrag	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.	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.