A note on the anti-glitch of magnetar SGR 1935+2154

TL;DR

This paper discusses the anti-glitch event of magnetar SGR 1935+2154, suggesting it was caused by an enhanced particle wind and analyzing its radio emissions within the wind braking model.

Contribution

It provides a new interpretation of the anti-glitch in SGR 1935+2154 as due to increased particle wind, challenging previous assumptions about its magnetic braking.

Findings

Anti-glitch linked to enhanced particle wind

Transient radio emission due to decreasing emission beam

Magnetar does not have a strong particle wind in persistent state

Abstract

The magnetar SGR 1935+2154 is reported to have an anti-glitch, accompanied by fast radio bursts, and transient pulsed radio emission. In the wind braking model, this triplet event tells people that (1) SGR 1935+2154 does not have a strong particle wind and can be approximated by magnetic dipole braking in the persistent state; (2) Its anti-glitch is due to an enhanced particle wind, similar to the first anti-glitch in magnetars; (3) Its transient pulsed radio emission may be due to a decreasing emission beam during the outburst; (4) The enhanced particle acceleration potential and pulsar death line may not be the dominate factor.