Arecibo PALFA Survey和Einstein@Home：Volunteer Computing发现脉冲双星
Arecibo PALFA Survey and Einstein@Home: Binary Pulsar Discovery by Volunteer Computing
摘要：
我们报告发现的20.7毫秒的二进制脉冲星J1952+2630，使用分布式计算项目爱因斯坦@家庭在脉冲星ALFA调查观测与阿雷西博望远镜。阿雷西博望远镜的后续观测证实了该系统的双星性质。我们得到一个圆形的轨道解，轨道周期为9.4小时，投影轨道半径为2.8 lt-s，和质量函数f = 0.15太阳质量的自旋周期测量分析。没有明显的轨道偏心率的证据;我们设定了2-sigma的上限e < 1.7e-3。轨道参数表明，假设脉冲星的质量为1.4太阳质量，它的质量最小为0.95太阳质量的大质量白矮星伴星。最有可能的是，这颗脉冲星属于罕见的中等质量双星。未来的计时观测将致力于进一步确定该系统的参数，测量相对论效应，并阐明伴星的性质。
英文摘要：
We report the discovery of the 20.7 ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope confirm the binary nature of the system. We obtain a circular orbital solution with an orbital period of 9.4 hr, a projected orbital radius of 2.8 lt-s, and a mass function of f = 0.15 solar masses by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2-sigma upper limit e < 1.7e-3. The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 solar masses, assuming a pulsar mass of 1.4 solar masses. Most likely, this pulsar belongs to the rare class of intermediate mass binary pulsars. Future timing observations will aim to determine the parameters of this system further, measure relativistic effects, and elucidate the nature of the companion star.
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