Effects of dynamo magnetic fields on observational properties of accreting millisecond X-ray pulsars

• Published in: Research in astronomy and astrophysics Vol. 21; no. 1; pp. 23 - 237
• Main Authors: Belay Zeleke, Dugasa, Belay Tessema, Solomon, Humne Negu, Seblu
• Format: Journal Article
• Language: English
• Published: Beijing National Astronomical Observatories, CAS and IOP Publishing Ltd 01.01.2021; IOP Publishing; Ehtiopian Space Science and Technology Institute (ESSTI),Entoto Observatory and Research Center (EORC),Astronomy and Astrophysics Research and Development Department,P.O.Box 33679 Addis Ababa,Ethiopia
• Subjects: Accretion disk; Accretion disks; Binary stars; Magnetic fields; Magnetic properties; Mathematical analysis; millisecond X-ray pulsars; Neutron stars; neutron stars, pulsars; Numerical methods; Pulsars; Radiation; Radiation pressure; Stellar rotation; Stellar surfaces; X ray binaries; X ray stars; neutron stars,pulsars; millisecond X-ray pulsars; Accretion disk
• ISSN: 1674-4527
• DOI: 10.1088/1674-4527/21/1/23

In this paper, we have investigated accreting millisecond X-ray pulsars, which are rapidly rotating neutron stars in low-mass X-ray binaries. These systems exhibit 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 disk around accreting millisecond X-ray pulsars in the presence of a dynamo generated magnetic field in the inner part of the disk. We have also formulated the numerical method for the structure equations in the inner region of the disk and the highest accretion rate is enough to form the inner region of the disk, 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.