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首页> 外文期刊>The Astrophysical journal >ORIENTATIONS OF SPIN AND MAGNETIC DIPOLE AXES OF PULSARS IN THE J0737-3039 BINARY BASED ON POLARIMETRY OBSERVATIONS AT THE GREEN BANK TELESCOPE
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ORIENTATIONS OF SPIN AND MAGNETIC DIPOLE AXES OF PULSARS IN THE J0737-3039 BINARY BASED ON POLARIMETRY OBSERVATIONS AT THE GREEN BANK TELESCOPE

机译：J0737-3039二元脉冲的自旋和磁偶极轴取向基于绿岸望远镜的极化观测。

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摘要

We report here the first polarimetric measurements of the pulsars in the J0737 — 3039 binary neutron star system using the Green Bank Telescope. The data suggest that the primary star (pulsar A) has a wide hollow cone of emission, which is an expected characteristic of the relatively open magnetosphere given its short spin period, and that pulsar A has a small angle between its spin and magnetic dipole axes, 4°+- 3°. This geometry suggests that pulsar A's wind pressure on pulsar B's magnetosphere will depend on orbital phase. This variable pressure is one mechanism for the variation of flux and profile shape of pulsar B with respect to the orbital phase that has been reported. The response of pulsar B to the pulsar A wind pressure will also depend on the particular side of its magnetosphere facing the wind at the spin phase when pulsar B is visible. This is a second possible mechanism for variability. We suggest that pulsar B may have its spin axis aligned with the orbital angular momentum owing to pulsar A's wind torque that contributes to its spin-down. Monitoring the pulsars while geodetic precession changes spin orientations will provide essential evidence to test detailed theoretical models. We determine the rotation measures of the two stars to be -112.3+- 1.5 and-118+- 12 rad m~(-2) .
机译：我们在此报告使用格林班克望远镜对J0737-3039双星中子星系统中的脉冲星进行的首次极化测量。数据表明，初级恒星（脉冲星A）具有较宽的空心发射锥，这是相对开放的磁层的自旋周期较短的预期特征，而脉冲星A的自旋和磁偶极轴之间的夹角较小，4°+-3°。这种几何形状表明，脉冲星B的磁层上脉冲星A的风压将取决于轨道相位。该可变压力是用于使脉冲星B的通量和轮廓形状相对于已报道的轨道相位变化的一种机制。当可见到脉冲星B时，脉冲星B对脉冲星A的响应还取决于其自旋阶段面对风的磁层的特定面。这是可变性的第二种可能的机制。我们建议脉冲星B的自旋轴可能会与轨道角动量对齐，这是由于脉冲星A的自旋扭矩有助于其向下旋转。在大地岁差改变自旋方向时监测脉冲星将为测试详细的理论模型提供必要的证据。我们确定两颗恒星的自转量度为-112.3 +-1.5和-118 +-12 rad m〜（-2）。

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