On Hoyle-Narlikar-Wheeler mechanism of vibration energy powered magneto-dipole emission of neutron stars

TL;DR

This paper revisits the Hoyle-Narlikar-Wheeler model, proposing that neutron star vibrations powered by magnetic field decay can produce magneto-dipole radiation, aligning with observations of magnetar emissions.

Contribution

It demonstrates that magnetic field decay is essential for energy conversion in vibration-powered neutron stars, providing a link to magnetar pulsations.

Findings

Vibration period lengthens with magnetic field decay.

Energy loss correlates with magnetic field decay rate.

Model aligns with magnetar emission data.

Abstract

We revisit the well-known Hoyle-Narlikar-Wheeler proposition that neutron star emerging in the magnetic-flux-conserving process of core-collapse supernova can convert the stored energy of Alfven vibrations into power of magneto-dipole radiation. We show that the necessary requirement for the energy conversion is the decay of internal magnetic field. In this case the loss of vibration energy of the star causes its vibration period, equal to period of pulsating emission, to lengthen at a rate proportional to the rate of magnetic field decay. These prediction of the model of vibration powered neutron star are discussed in juxtaposition with data on pulsating emission of magnetars whose radiative activity is generally associated with the decay of ultra strong magnetic field.