论文标题
黑寡妇脉冲星的正时稳定性
Timing stability of black widow pulsars
论文作者
论文摘要
我们研究了三个黑寡妇脉冲星的定时稳定性，包括它们的长期自旋进化和较短的轨道稳定性。被发现的前两个黑寡妇脉冲星系统（PSRS B1957+20和J2051 $ - $ 0827）的前两个黑寡妇脉冲星系统的不稳定的时序行为和无线电蚀被认为是这类Pulsars的代表性。在过去的十年中，随着几个新的黑寡妇系统添加到该人群中，现在已知的几个系统不显示这些典型的轨道变化或无线电蚀。我们使用7美元的观察结果从四个欧洲PULSAR计时阵列暂停望远镜中进行了7美元 - $ 8年的观察，J0023+0923，J2214+3000和J22234+0944，并确认这些系统中的两个明显的孔可变性在我们观察的时间范围内都没有显示出任何明显的孔变量。第三个PULSAR PSR J0023+0923显示了轨道变异性，我们讨论了对时序解决方案的影响。与早期作品相比，这些脉冲星的长期时机的结果提供了几种新的或改进的参数。我们讨论了有关这些脉冲星的稳定性的结果，以及在二进制参数的背景下，一般而言，黑寡妇脉冲星类别的稳定性，并讨论了伴侣恒星的Roche-lobe填充因子的潜力，是这些系统稳定性的指标。
We study the timing stability of three black widow pulsars, both in terms of their long-term spin evolution and their shorter-term orbital stability. The erratic timing behaviour and radio eclipses of the first two black widow pulsar systems discovered (PSRs B1957+20 and J2051$-$0827) was assumed to be representative for this class of pulsars. With several new black widow systems added to this population in the last decade, there are now several systems known that do not show these typical orbital variations or radio eclipses. We present timing solutions using 7$-$8 yrs of observations from four of the European Pulsar Timing Array telescopes for PSRs\,J0023+0923, J2214+3000 and J2234+0944, and confirm that two of these systems do not show any significant orbital variability over our observing time span, both in terms of secular or orbital parameters. The third pulsar PSR J0023+0923 shows orbital variability and we discuss the implications for the timing solution. Our results from the long-term timing of these pulsars provide several new or improved parameters compared to earlier works. We discuss our results regarding the stability of these pulsars, and the stability of the class of black widow pulsars in general, in the context of the binary parameters, and discuss the potential of the Roche-lobe filling factor of the companion star being an indicator for stability of these systems.
