Tags: Star.
GX 339-4 is a moderately strong variable galactic low-mass X-ray binary (LMXB) source and black-hole candidate that flares from time to time.During the outbursts GX 339-4 shows evolution of quasi-periodic oscillations (QPOs). In the rising phase the QPO frequency monotonically increase as the CENBOL propagates closer to the black hole and in the declining phase the QPO frequency monotonically decreases since the CENBOL recedes away from the black hole after viscosity is decreased.
