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arXiv 1906.05071astro-ph.HEastro-ph.SRgr-qc
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Arecibo 327-MHz漂移扫描脉冲星巡天发现六颗闪烁脉冲星

The Discovery of Six Recycled Pulsars from the Arecibo 327-MHz Drift-Scan Pulsar Survey

J. G. Martinez, P. Gentile, P. C. C. Freire, K. Stovall, J. S. Deneva, G. Desvignes, F. A. Jenet, M. A. McLaughlin, M. Bagchi, T. Devine

摘要:

暗中子星是古老的($\gtrsim10^{8}$ yr)中子星,它们是紧密相互作用的恒星系统的后代。为了了解它们的进化和种群,我们必须以尽可能公正的方式找到并研究尽可能多的回收植物。在这项工作中,我们提出了发现和时间的解决方案,五个回收双星系统(PSR J 0509 $+$ 0856,J 0709 $+$ 0458,J 0732 $+$ 2314,J 0824 $+$ 0028,J2204 $+$ 2700)和一颗孤立的毫秒脉冲星(PSR J 0154 $+$ 1833)。这些是在阿雷西沃327 MHz漂移扫描脉冲星巡天(AO 327)的数据中发现的。所有这些恒星都具有低色散测量(DM)($\lesssim 45 \, \rm{pc}\, cm^{-3}$),并且具有DM确定的$\lesssim$ 3 kpc的距离。他们的时间解决方案,有数据跨度从1到$\sim$ 7年,包括其自旋和天体测量参数的精确估计,并为双星,其开普勒双星参数的精确估计。它们的轨道周期从4天到815天不等,最小伴星质量(假设脉冲星质量为1.4 $\rm{M_{\odot}}$)从$\sim$ 0.06到1.11 $\rm{M_{\odot}}$不等。对于两个二进制文件,我们检测后开普勒参数的情况下,PSR~ J 0709 $+$ 0458,我们测量组件的质量,但精度较低,在不久的将来,测量近星点的推进速度和夏皮罗延迟将允许非常精确的质量测量这个系统。与AO 327数据中发现的其他几个系统一样,PSR J 0509 $+$ 0854、J 0709 $+$ 0458和J 0732 $+$ 2314现在是NANOGrav定时阵列的一部分,用于引力波探测。

英文摘要:

Recycled pulsars are old ($\gtrsim10^{8}$ yr) neutron stars that are descendants from close, interacting stellar systems. In order to understand their evolution and population, we must find and study the largest number possible of recycled pulsars in a way that is as unbiased as possible. In this work, we present the discovery and timing solutions of five recycled pulsars in binary systems (PSRs J0509$+$0856, J0709$+$0458, J0732$+$2314, J0824$+$0028, J2204$+$2700) and one isolated millisecond pulsar (PSR J0154$+$1833). These were found in data from the Arecibo 327-MHz Drift-Scan Pulsar Survey (AO327). All these pulsars have a low dispersion measure (DM) ($\lesssim 45 \, \rm{pc}\, cm^{-3}$), and have a DM-determined distance of $\lesssim$ 3 kpc. Their timing solutions, have data spans ranging from 1 to $\sim$ 7 years, include precise estimates of their spin and astrometric parameters, and for the binaries, precise estimates of their Keplerian binary parameters. Their orbital periods range from about 4 to 815 days and the minimum companion masses (assuming a pulsar mass of 1.4 $\rm{M_{\odot}}$) range from $\sim$ 0.06--1.11 $\rm{M_{\odot}}$. For two of the binaries we detect post-Keplerian parameters; in the case of PSR~J0709$+$0458 we measure the component masses but with a low precision, in the not too distant future the measurement of the rate of advance of periastron and the Shapiro delay will allow very precise mass measurements for this system. Like several other systems found in the AO327 data, PSRs J0509$+$0854, J0709$+$0458 and J0732$+$2314 are now part of the NANOGrav timing array for gravitational wave detection.

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