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P-Pdot diagram

(diagram comparing the rotation and the slowing of pulsars)

A P-Pdot diagram is a graph plotting the rotation periods (P) of pulsars with the rate of change in their periods (Pdot), aiming to reveal patterns that make evident the characteristics and evolution of pulsars. Their periods generally slowly lengthen with time, but can on occasion jump to a slightly shorter period (a glitch), presumably due to a significant rearrangement of internal mass, which could be thought of as a "pulsar quake". The diagrams tend to show a difference between binary pulsars and lone pulsars, where the binary pulsars have a shorter period and don't slow their rotation as quickly.

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