A precessing magnetar model for GLEAM-X J162759.5-523504.3

2022/01/28 by K. Yavuz Ekşi, Ekşi, K. Yavuz, Sinem Şaşmaz +1
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #FOS: Physical sciences #Geophysics and Gravity Measurements #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.2202.05160

openalex publication_date 2022/01/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose a precessing transient magnetar model for the recently discovered radio source GLEAM-X J162759.5-523504.3. We identify the observed period of ∼ 1 ks as the precession period of the magnetar deformed due to its strong (B_ϕ ∼ 10¹⁶ G) toroidal field. The resulting deformation of order 10^-4 implies a spin period of P_{\rm s} = 0.1 s. Assuming a strong dipole field of B_{\rm d} ∼ 10¹⁴ G we predict a period derivative of P_{\rm s}∼ 10^-11 s/s. We also predict that the precession period of the magnetar can be observed in the hard X-ray band just as the other three galactic magnetars exhibit precession.

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