... 长周期波动 long period fluctuation; long term cyclic fluctuation; long-period fluctuation 拟周期波动quasi-periodic oscillation 周期波动 cyclic swing; cyclical swings ...
abstract:In X-ray astronomy, quasi-periodic oscillation (QPO) is the manner in which the X-ray light from an astronomical object flickers about certain frequencies. In these situations, the X-rays are emitted near the inner edge of an accretion disk in which gas swirls onto a compact object such as a white dwarf, neutron star, or black hole.