Braking PSR J1734-3333 with a possible fall-back disk

Abstract

The very small braking index of PSR J1734-3333, $n=0.9\pm 0.2$, challenges the current theories of braking mechanisms in pulsars. We present a possible interpretation that this pulsar is surrounded by a fall-back disk and braked by it. A modified braking torque is proposed based on the competition between the magnetic energy density of a pulsar and the kinetic energy density of a fall-back disk. With this torque, a self-similar disk can fit all the observed parameters of PSR J1734-3333 with natural initial parameters. In this regime, the star will evolve to the region having anomalous X-ray pulsars and soft gamma repeaters in the $P-\dot{P}$ diagram in about 20000 years and stay there for a very long time. The mass of the disk around PSR J1734-3333 in our model is about $10M_{\oplus }$, similar to the observed mass of the disk around AXP 4U 0142+61.

8 pages, 3 figures, 1 table

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• Low braking index of PSR J1734-3333: an interaction between fall-back disk and magnetic field?
• Rotational Evolution of The Slowest Radio Pulsar PSR J0250+5854
• A solution of the puzzling symbiotic X-ray system 4U 1700+24
• The braking index of PSR B0540-69 and the associated pulsar wind nebula emission after spin-down rate transition
• VLA proper motion constraints on the origin, age, and potential magnetar future of PSR J1734$-$3333
• The optical/UV excess of X-ray-dim isolated neutron star II. nonuniformity of plasma on strangeon star surface
• On the variable timing behavior of PSR B0540-69: an almost excellent example to study pulsar braking mechanism
• On the timing behavior of PSR B1259-63 under the propeller torque from a transient accretion disc
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