发表机构
Max Planck Institute for Gravitational Physics (Albert Einstein Institute); Leibniz Universität Hannover; Center for Gravitation, Cosmology, and Astrophysics, Department of Physics and Astronomy, University of Wisconsin-Milwaukee; Centre for Astrophysics and Supercomputing, Swinburne University of Technology; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav); Department of Physics and Astronomy, Franklin and Marshall College; Department of Physics and Astronomy, West Virginia University; Center for Gravitational Waves and Cosmology, West Virginia University; School of Engineering, Murray State University（马克斯·普朗克引力物理研究所（爱因斯坦研究所）; 汉诺威莱布尼茨大学; 威斯康星大学密尔沃基分校物理与天文学系引力、宇宙学和天体物理学中心; 斯威本科技大学天体物理学与超级计算中心; 澳大利亚研究理事会引力波发现卓越中心（OzGrav）; 富兰克林和马歇尔学院物理与天文学系; 西弗吉尼亚大学物理与天文学系; 西弗吉尼亚大学引力波与宇宙学中心; 默里州立大学工程学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过重处理帕克斯存档数据，在大小麦哲伦云新发现6颗脉冲星，其中含1颗MC最慢脉冲星，提升了该区域脉冲星巡天完整性，验证了存档数据再分析的重要性。
AI 中文摘要
已知射电脉冲星中仅有略超1%位于大小麦哲伦云（MCs），这两个卫星星系距离银河系50-62千秒差距（kpc），这些脉冲星对限制脉冲星光度函数的峰值具有重要意义，还能为研究与银河系金属丰度不同的恒星形成的中子星种群提供见解。我们采用经证实能通过高次谐波折叠近噪声基底候选体，在存档数据中发现大量脉冲星的高效搜索技术，重新处理了原始帕克斯多波束麦哲伦云（MC）巡天数据，共发现6颗脉冲星。其中5颗位于大麦哲伦云（LMC），包括1颗自旋周期为3.8秒的脉冲星，使其成为已知MC中最慢的脉冲星；剩余1颗脉冲星在小麦哲伦云（SMC）方向被探测到，与银河系前景相关。新发现的脉冲星中有4颗表现出闪烁，1颗呈现明显的零脉冲（nulling），其他则显示可能的零脉冲行为。这些发现使已知LMC射电脉冲星总数达到49颗。对当前所有MC脉冲星的光度函数和占空比分析表明，它们与银河系经典脉冲星一致。种群合成模拟显示，基于其母种群采用的上限，更深入的巡天将在MC中发现更多脉冲星，包括少量毫秒脉冲星。最后，本次重处理证明了重新分析存档数据的持续重要性，既可以提高脉冲星巡天的完整性，又能探测到具有科学价值的天体。
英文摘要
Just over 1% of the known radio pulsar population resides in the Large and Small Magellanic Clouds (MCs), the satellite galaxies that are 50-62 kpc distant from the Milky Way. These pulsars are important for constraining the peak of the pulsar luminosity function, and may give insights into neutron star populations formed from stars of different metallicities than the Milky Way. Using search techniques that have proven highly effective at discovering a large number of pulsars in archival data by folding candidates near the noise floor at high harmonic folds, we reprocessed the original Parkes Multibeam MC surveys and discovered six pulsars. Five of these pulsars are located in the Large Magellanic Cloud (LMC), including one with a spin period of 3.8s, making it the slowest pulsar known in the MCs. The remaining pulsar was detected toward the Small Magellanic Cloud (SMC), and is associated with the Milky Way foreground. Four of the newly discovered pulsars exhibit scintillation, with one showing clear nulling and others showing possible nulling behavior. These discoveries bring the total number of radio pulsars known in the LMC to 49. A luminosity function and duty cycle analysis of all current MC pulsars shows that they are consistent with Galactic canonical pulsars. Population synthesis simulations suggest that deeper surveys would reveal many more pulsars in the MCs, including up to handful of millisecond pulsars, based on the adopted upper limits for their parent populations. Finally, this reprocessing demonstrates the continued importance of reanalyzing archival data, both to improve the completeness of pulsar surveys and detect scientifically valuable objects.
CommentsAccepted for publication in ApJ Letters
