1306.2445 (H. Tong)

Anti-glitch of magnetar 1E 2259+586 in the wind braking scenario    [PDF]

H. Tong

The anti-glitch of magnetar 1E 2259+586 is analyzed theoretically. It is shown that the internal origin is not favored, while there are enough parameter space for this anti-glitch in the wind braking model of magnetars. An enhanced particle wind during the observational interval will taken away additional rotation energy of the neutron star. This will result in a net spin-down of the magnetar, i.e. an anti-glitch. In the wind braking scenario of magnetar anti-glitch, there are several predictions: (1) A radiative event will always accompany the anti-glitch, (2) Decrease/variation of braking index after anti-glitch, (3) Anti-glitch is just a period of enhanced spin-down etc. These predictions can be tested by future observations. Applications to previous timing events of SGR 1900+14, and PSR J1846-0258 are also included. It is shown that current timing events of 1E 2259+586, SGR 1900+14, and PSR J1846-0258 can be understood safely in the wind braking model.

View original: http://arxiv.org/abs/1306.2445