环加速间隙下的脉冲星星风制动模型
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(广州大学物理与电子工程学院广州510006)

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P145;

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国家自然科学基金项目(11773008)资助


Wind Braking Model of Pulsars in the Case of Annular Acceleration Gap
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(footnotesize{School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006)

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    摘要:

    为了解释间歇脉冲星PSR B1931+24在射电噪比射电宁静状态下更大的自转减慢率和模拟蟹状星云脉冲星的自转演化, 建立同时考虑了具有不同加速电势的核区和环区的环加速间隙下的星风制动模型. 其中对于PSR B1931+24通过计算得到它的磁场强度和磁倾角, 并且预言了其理论制动指数. 对于蟹状星云脉冲星, 通过计算得到它的磁场强度和磁倾角,还计算得到其制动指数随周期的演化和它在周期-周期导数图上的自转演化. 相比于真空加速间隙、外加速间隙等, 环加速间隙也同样能够适用于星风制动模型.

    Abstract:

    In order to explain the higher spin down rate of the intermittent pulsar PSR B1931+24 in the radio-on state than that in the radio-off state, and to simulate the rotation evolution of the Crab pulsar, the wind braking model in the annular acceleration gap considering both core and annular region with different acceleration potentials was established. For PSR B1931+24, the magnetic field strength and magnetic inclination angle are calculated, and the theoretical braking index is predicted. For the Crab pulsar, it is calculated for the magnetic field strength and magnetic inclination angle, evolution of the braking index with the period, and rotation evolution on the period-period derivative diagram. Compared with the vacuum acceleration gap, outer acceleration gap, etc., the annular acceleration gap can also be applied to the wind braking model of pulsars.

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胡永峰,仝号.环加速间隙下的脉冲星星风制动模型[J].天文学报,2020,(3):120-131.

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  • 收稿日期:2020-01-08
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  • 在线发布日期: 2020-06-02
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