论文标题
长期Period Pulsar PSR J0901-4046的演变
Evolution of the long-period pulsar PSR J0901-4046
论文作者
论文摘要
后备光盘模型预测，在今年发现前两个长期plyod Pulsars（LPP）之前，异常的X射线脉冲星（AXP）和软伽马中继器（SGR）将演变为孤立的长期脉冲星。与正常的无线电脉冲星不同，LPP显示出具有异常和可变脉冲形状的瞬时脉冲Radio时期，类似于少数无线电发射AXP/SGR的无线电行为。我们表明，最近发现的第二个LPP PSR J0901-4046（$ p \ simeq 76 $ s）的当前属性是由于与后备光盘相互作用而获得的，因为我们已经显示了第一个发现的LPP，GLEAM-X J162759.5959.5-523504.34.3（$ P \ s $ p pleam-x J162759.59.59.59.5-523504.3（$ p \ simeq）。虽然该期间衍生物只有上限，但GLEAM-X J162759.5-523504.3的$ \ dot {p} $，$ \ dot {p} $ psr j0901-4046的$ \ dot {p} $已经被测量，为进化模型提供了更好的约束。该模型可以使用偶极矩$μ\ simeq 10^{30} $ g cm $^3 $生成源属性。结果对初始脉冲星不敏感。我们的结果表明，PSR J0901-4046在几岁$ 10^4 $ yr的年龄中经过AXP/SGR时期，并且是$ \ sim（6-8）\ times 10^5 $ yr现在。
The fallback disc model predicted that anomalous X-ray pulsars (AXPs) and soft-gamma repeaters (SGRs) will evolve to isolated long period pulsars before the discovery of the first two long-period pulsars (LPPs) this year. Unlike normal radio pulsars, LPPs show transient pulsed-radio epochs with unusual and variable pulse shapes, similar to the radio behaviour of the few radio emitting AXP/SGRs. We show that the present properties of the recently discovered second LPP, PSR J0901-4046 ($P \simeq 76$ s), are obtained as a result of evolution in interaction with a fallback disc, as we had already shown for the first discovered LPP, GLEAM-X J162759.5-523504.3 ($P \simeq 1091$ s). While there is only an upper limit to the period derivative, $\dot{P}$, of GLEAM-X J162759.5-523504.3, the $\dot{P}$ of the PSR J0901-4046 has already been measured, providing better constraints for the evolutionary models. The model can produce the source properties with a dipole moment $μ\simeq 10^{30}$ G cm$^3$. The results are not sensitive to the initial pulsar period. Our results indicate that PSR J0901-4046 went through an AXP/SGR epoch at an age of a few $10^4$ yr, and is $\sim (6 - 8) \times 10^5$ yr old at present.
