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arXiv · 2202.05160

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

K. Yavuz Ekşi·Sinem Şaşmaz
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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 $\sim 1$ ks as the precession period of the magnetar deformed due to its strong ($B_{\phi} \sim 10^{16}$ 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 $B_{\rm d} \sim 10^{14}$ G we predict a period derivative of $\dot{P}_{\rm s}\sim 10^{-11}$ 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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K. Yavuz Ekşi, Sinem Şaşmaz. 2022-01-28. A precessing magnetar model for GLEAM-X J162759.5-523504.3. https://arxiv.org/abs/2202.05160

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