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arXiv 1402.4836astro-ph.HE
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用PSR B1534 +12对相对论引力的综合研究

A Comprehensive Study of Relativistic Gravity using PSR B1534+12

E. Fonseca, I. H. Stairs, S. E. Thorsett

摘要:

我们提出了更新的分析脉冲轮廓和他们的到达时间从PSR B1534+12,一个37.9毫秒的射电脉冲星在轨道上与另一个中子星。一个高精度的定时模型来自22年的定时数据,并占所有天体物理过程,系统地影响脉冲到达时间。五个“后开普勒”参数的测量,代表相对论修正的脉冲星的双星轨道的标准开普勒量。这些相对论参数然后被用来测试广义相对论通过比较测量值与它们的预测值。我们的结论是,相对论被证实在其预测的0.17%之内。此外,我们得出以下天体物理结果,从我们的时间分析:距离$d_{\rm GR} = 1.051 \pm 0.005$千秒差距的脉冲星双星系统,通过有关的“多余”的轨道衰减银河系参数;脉冲“抖动”PSR B1534+12由于短期磁层活动的证据;和脉冲色散特性的演变。作为二次研究,我们还提出了几个分析脉冲结构的演变及其连接到相对论性的脉冲星的自旋轴的进动。岁差率的测量值为$Ω_1^{\rm spin}$ = $0.59^{+0.12}_{-0.08}$ $^{\circ}$ /年(68%置信度),与预期一致,代表了相对论引力的额外检验。

英文摘要:

We present updated analyses of pulse profiles and their arrival-times from PSR B1534+12, a 37.9-ms radio pulsar in orbit with another neutron star. A high-precision timing model is derived from twenty-two years of timing data, and accounts for all astrophysical processes that systematically affect pulse arrival-times. Five "post-Keplerian" parameters are measured that represent relativistic corrections to the standard Keplerian quantities of the pulsar's binary orbit. These relativistic parameters are then used to test general relativity by comparing the measurements with their predicted values. We conclude that relativity theory is confirmed to within 0.17% of its predictions. Furthermore, we derive the following astrophysical results from our timing analysis: a distance of $d_{\rm GR} = 1.051 \pm 0.005$ kpc to the pulsar-binary system, by relating the "excess" orbital decay to Galactic parameters; evidence for pulse "jitter" in PSR B1534+12 due to short-term magnetospheric activity; and evolution in pulse-dispersion properties. As a secondary study, we also present several analyses on pulse-structure evolution and its connection to relativistic precession of the pulsar's spin axis. The precession-rate measurement yields a value of $Ω_1^{\rm spin}$ = $0.59^{+0.12}_{-0.08}$ $^{\circ}$/year (68% confidence) that is consistent with expectations, and represents an additional test of relativistic gravity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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