arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2502.04571astro-ph.HE
收藏

阿雷西博327 MHz漂移巡天中49颗脉冲星的发现与计时

Discovery and Timing of 49 Pulsars from the Arecibo 327-MHz Drift Survey

Timothy E. E. Olszanski, Evan F. Lewis, Julia S. Deneva, Maura A. McLaughlin, Kevin Stovall, Paulo C. C. Freire, Benetge B. P. Perera, Manjari Bagchi, Jose G. Martinez

AI总结:

本文报告了阿雷西博AO327巡天发现的49颗脉冲星的计时结果,包括18颗新发现,并揭示了子脉冲双向漂移、中间脉冲等特殊辐射现象及色散量模型偏差。

摘要:

我们展示了来自AO327脉冲星巡天的18颗脉冲星新发现,以及它们的计时解和另外31颗AO327巡天所发现脉冲星的计时解。计时解是利用2013年至2019年期间使用阿雷西博天文台327 MHz接收机进行的后续计时观测活动所获得的。除PSR J0916+0658——一颗显示出部分再循环证据的孤立脉冲星——之外,其余新发现均为非再循环脉冲星。我们对所有脉冲星的辐射特征进行了简要普查,其中有以下突出之处:发现PSR J1942+0142表现出极为罕见的子脉冲双向漂移现象,而PSR J0225+1727具有中间脉冲。我们还利用NE2001和YMW16银河系电子密度模型给出了距离估计,并识别出至少10个源,其中一个或两个模型都低估了沿视线方向的最大银河系色散量。

英文摘要:

We present 18 pulsar discoveries from the AO327 pulsar survey, along with their timing solutions and those for an additional 31 AO327-discovered pulsars. Timing solutions were constructed using observations from a follow-up timing campaign taken between the periods of 2013 -- 2019 using the Arecibo Observatory's 327-MHz receiver. Aside from PSR J0916+0658, an isolated pulsar that shows evidence for partial recycling, the remaining discoveries are non-recycled pulsars. We present a brief census of emission features for all pulsars with the following standouts. PSR~J1942+0142 is found to exhibit the very rare phenomenon of subpulse bi-drifting and PSR~J0225+1727 has an interpulse. We also report distance estimates using the NE2001 and YMW16 Galactic electron density models, and identify at least 10 sources where either one or both models underestimate the maximum Galactic line of sight dispersion measure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑