钱德拉普尔索尔运动和十九个脉冲星毫米角秒天体测量
Chandra Proper Motions and Milliarcsecond Astrometry of Nineteen Pulsars
AI总结：
利用钱德拉X射线望远镜数据，研究人员首次精确测量了19个脉冲星的X射线自行，揭示了新的X射线纤维和脉冲星风星云结构。
摘要：
我们利用钱德拉X射线望远镜的新数据和存档数据，对19个脉冲星进行了X射线自行测量，包括脉冲星风迹和X射线纤维。精确的X射线自行通常受到将观测对齐到共同参考系的不确定性限制。我们的分析使用了Gaia目录中未解析的X射线流量以及X射线明亮点源进行对齐，提高了不确定性。我们获得参考Gaia的绝对位置，具有典型的天体测量精度约为10毫弧秒，自行统计不确定性降至1.3毫弧秒/年，这是目前最精确的X射线自行测量。通过我们改进的框架对齐，自行精度现在通常受到脉冲星流量的限制。这些结果揭示了一个新的X射线纤维，并照亮了这些脉冲星的风星云结构和起源。
英文摘要：
We present X-ray proper motion (PM) measurements of 19 pulsars using new and archival data from the Chandra X-ray Observatory, including pulsar wind trails and X-ray filaments. Precise X-ray PMs are often limited by uncertainties in aligning observations to a common reference frame. Our analysis uses unresolved X-ray flux from stars in the Gaia catalog in addition to X-ray bright point sources for alignment, improving uncertainties. We obtain absolute positions referenced to Gaia with typical astrometric precision $\sim$10 mas and PM statistical uncertainties down to 1.3 mas yr$^{-1}$, the most precise X-ray PM achieved to date. With our improved frame alignment, PM accuracies are now limited by the pulsar flux in most cases. These results reveal a new X-ray filament and illuminate the wind nebula structures and origins of several of these pulsars.
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