脉冲星探照灯探测银河系结构

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-12-19 DOI:10.1038/s41550-024-02459-6

Paul Woods

引用次数: 0

摘要

脉冲星的射电辐射可以在星际介质（ISM）中带电粒子分布的不均匀性中散射，这一过程称为闪烁。这种散射引起的干扰在脉冲星的动态光谱中产生了明亮的峰值，产生了一个特征的“闪烁带宽”，这取决于脉冲星视线上ISM的密度增强。索菲亚·谢赫和同事利用阿雷西博望远镜AO327脉冲星调查（从2010年到2020年望远镜消亡）期间收集的大量档案数据集，以这种方式从23颗脉冲星中提取了38个带宽。令人惊讶的是，几乎所有的测量结果都比基于银河系内自由电子密度的常用模型的预期要大，这突出了定期更新这些模型的必要性。谢赫和他的同事发现，两种流行的银河系电子密度模型NE2001和YMW16及其闪烁数据之间存在不同程度的一致性，NE2001模型提供了最佳的整体拟合——尽管这并不意外，因为NE2001训练脉冲星包括在数据集中，而大多数YMW16脉冲星没有。首次获得了6颗脉冲星的带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Pulsar searchlights probe Galactic structure

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.