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A 2.1 solar mass PULSAR MEASURED BY RELATIVISTIC ORBITAL DECAY

机译:相对论轨道衰变测量的2.1太阳质量脉冲星

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PSR J0751 + 1807 is a millisecond pulsar in a circular 6 hr binary system with a helium white dwarf secondary. Through high-precision pulse timing measurements with the Arecibo and Effelsberg radio telescopes, we have detected the decay of its orbit due to emission of gravitational radiation. This is the first detection of the relativistic orbital decay of a low-mass, circular binary pulsar system. The measured rate of change in orbital period, corrected for acceleration biases, is P_b = (- 6.4 ± 0.9) x 10~(-14). Interpreted in the context of general relativity, and combined with measurement of Shapiro delay, it implies a pulsar mass of 2.1 ± 0.2 solar mass, the most massive pulsar measured. This adds to the emerging trend toward relatively high neutron star masses in neutron star-white dwarf binaries. In addition, there is some evidence for an inverse correlation between pulsar mass and orbital period in these systems. We consider alternatives to the general relativistic analysis of the data, and we use the pulsar timing data to place limits on violations of the strong equivalence principle.
机译:PSR J0751 + 1807是圆形6小时二元系统中的毫秒脉冲星,具有次级的氦白矮星。通过使用Arecibo和Effelsberg射电望远镜进行高精度脉冲计时测量,我们已经检测到由于引力辐射的发射而导致的轨道衰减。这是对低质量圆形双脉冲星系统相对论轨道衰减的首次探测。校正后的加速度偏差测得的轨道周期变化率是P_b =(-6.4±0.9)x 10〜(-14)。在广义相对论的背景下进行解释,并结合对Shapiro延迟的测量,这意味着脉冲星质量为2.1±0.2太阳质量,这是所测量的最大质量的脉冲星。这增加了中子星白矮星双星中相对较高的中子星质量的新兴趋势。另外,在这些系统中,有一些证据表明脉冲星质量与轨道周期成反比。我们考虑对数据进行相对论分析的替代方法,并使用脉冲星定时数据对违反强等价原理的情况进行限制。

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