Radio profile instability in the millisecond pulsar PSR J0437-4715 resulting from spiky emission

The instability in one of the components of the radio integrated profile (IP) of the millisecond pulsar PSR J0437-4715 is correlated with the occurrence of the spiky emission in that component. It is speculated that the instability in other components is also as a result of the spiky emission. This might have important implications for interpreting the individual components of the IP as independent beams or regions of emission.