Effects of dynamo magnetic fields on observational properties of Accreting Millisecond X-ray Pulsars

TL;DR

This study models how dynamo-generated magnetic fields influence the structure and observational properties of accreting millisecond X-ray pulsars, highlighting the effects of magnetic fields on accretion disc dynamics and radiation.

Contribution

We developed fundamental equations and a numerical method to analyze the impact of dynamo magnetic fields on accretion discs in millisecond X-ray pulsars, including radiation pressure effects.

Findings

Dynamo magnetic fields significantly alter disc structure.

High accretion rates lead to radiation pressure dominated inner discs.

Magnetic fields influence observable X-ray pulsation properties.

Abstract

In this paper, we have investigated the accreting millisecond X-ray pulsars, which are rapidly rotating neutron stars in low-mass X-ray binaries. These systems show coherent X-ray pulsations that arise when the accretion flow is magnetically channeled to the stellar surface. Here, we have developed the fundamental equations for an accretion disc around accreting millisecond X-ray pulsars in the presence of a dynamo generated magnetic fields in the inner part of the disc and we have also formulated the numerical method for the structure equations in the inner region of the disc and the highest accretion rate is enough to make the inner region of the disc which is overpowered by radiation pressure and electron scattering. Finally, we have examined our results with the effects of dynamo magnetic fields on accreting millisecond X-ray pulsars.