Einstein@Home 射电脉冲星搜索与 PSR J2007+2722 的发现
摘要
Einstein@Home 汇聚了来自 193 个国家的数十万名志愿者的计算能力，利用来自电磁探测器与引力波探测器的数据搜寻新的中子星。本文详细描述了利用 Arecibo 天文台的 Pulsar ALFA 巡天数据搜寻新射电脉冲星的工作。庞大的计算能力使得该搜索能够覆盖参数空间的新区域；它可以探测到轨道周期短至 11 分钟的双星系统中的脉冲星。我们还描述了 Einstein@Home 的首次发现，即频率为 40.8 Hz 的孤立脉冲星 PSR J2007+2722，并提供了完整的计时模型。PSR J2007+2722 的脉冲轮廓异常宽，其辐射几乎覆盖整个自转周期。该中子星极有可能是一颗被瓦解的再生脉冲星，其年龄与其 404 Myr 的特征自转特征年龄相仿。然而，也有较小的可能性是它诞生于较近时期，且具有低磁场。若如此，X 射线流量的上限表明但无法证实 PSR J2007+2722 的年龄至少约为 100 kyr。未来，我们期望由志愿者提供的巨大计算能力将促成更多射电脉冲星的发现。
引用
@article{arxiv.1303.0028,
title = {The Einstein@Home search for radio pulsars and PSR J2007+2722 discovery},
author = {B. Allen and B. Knispel and J. M. Cordes and J. S. Deneva and J. W. T. Hessels and D. Anderson and C. Aulbert and O. Bock and A. Brazier and S. Chatterjee and P. B. Demorest and H. B. Eggenstein and H. Fehrmann and E. V. Gotthelf and D. Hammer and V. M. Kaspi and M. Kramer and A. G. Lyne and B. Machenschalk and M. A. McLaughlin and C. Messenger and H. J. Pletsch and S. M. Ransom and I. H. Stairs and B. W. Stappers and N. D. R. Bhat and S. Bogdanov and F. Camilo and D. J. Champion and F. Crawford and G. Desvignes and P. C. C. Freire and G. Heald and F. A. Jenet and P. Lazarus and K. J. Lee and J. van Leeuwen and R. Lynch and M. A. Papa and R. Prix and R. Rosen and P. Scholz and X. Siemens and K. Stovall and A. Venkataraman and W. Zhu},
journal= {arXiv preprint arXiv:1303.0028},
year = {2013}
}
备注
ArXiv version updated to correspond to the published ApJ version. This includes pulse profiles for PSR J2007+2722 at 327 and 430 MHz, correction of a sign error in the polarimetry conventions, improvements to the estimate of the expected shortest orbital period of a Galactic DNS system, and other changes made in refereeing and proof. 32 pages, 19 figures, 7 tables