arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.02744astro-ph.HEastro-ph.SRgr-qc
收藏

脉冲双星PSR B1913 +16定时的相对论测量

Relativistic Measurements from Timing the Binary Pulsar PSR B1913+16

Joel M. Weisberg, Yuping Huang

摘要:

我们提出了9257测量的到达时间从第一个脉冲双星,PSR B1913+16,在过去的35年中获得的相对论分析。开普勒轨道根数加上两个相对论项的测定完全表征了双星系统,除了一个关于视线的未知旋转;导致确定脉冲星及其伴星的质量:1.438 $\pm$ 0.001太阳质量和1.390 $\pm$ 0.001太阳质量,分别。此外,完整的系统表征允许通过比较各种相对论现象的测量和预测大小来创建相对论引力的测试。我们发现观测到的由于引力波阻尼(用运动学项修正)而引起的轨道周期减小与广义相对论预言的比值为0.9983 pm 0.0016,从而证实了广义相对论预言的引力辐射的存在和强度。在该系统中,我们还首次成功地测量了表征Shapiro引力传播延迟的两个参数,并发现它们的值与广义相对论预测一致。我们还测量了第一次在任何系统的相对论形状修正椭圆轨道,$δ_θ$,虽然其内在价值是模糊的,目前未量化的脉冲星发射光束像差。我们还略微测量了投影半长轴的时间导数,当结合测地岁差观测的光束像差模型进行改进时,最终应该限制脉冲星的转动惯量。

英文摘要:

We present relativistic analyses of 9257 measurements of times-of-arrival from the first binary pulsar, PSR B1913+16, acquired over the last thirty-five years. The determination of the 'Keplerian' orbital elements plus two relativistic terms completely characterizes the binary system, aside from an unknown rotation about the line of sight; leading to a determination of the masses of the pulsar and its companion: 1.438 $\pm$ 0.001 solar masses and 1.390 $\pm$ 0.001 solar masses, respectively. In addition, the complete system characterization allows the creation of tests of relativistic gravitation by comparing measured and predicted sizes of various relativistic phenomena. We find that the ratio of observed orbital period decrease due to gravitational wave damping (corrected by a kinematic term) to the general relativistic prediction, is 0.9983 pm 0.0016; thereby confirming the existence and strength of gravitational radiation as predicted by general relativity. For the first time in this system, we have also successfully measured the two parameters characterizing the Shapiro gravitational propagation delay, and find that their values are consistent with general relativistic predictions. We have also measured for the first time in any system the relativistic shape correction to the elliptical orbit, $δ_θ$,although its intrinsic value is obscured by currently unquantified pulsar emission beam aberration. We have also marginally measured the time derivative of the projected semimajor axis, which, when improved in combination with beam aberration modelling from geodetic precession observations, should ultimately constrain the pulsar's moment of inertia.

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。

↑