脉冲星风星云3C58的距离和年龄
On the Distance and Age of the Pulsar Wind Nebula 3C58
摘要：
越来越多的天文学家提出证据表明，脉冲星风星云3C58比与公元1181年历史上的超新星的联系要古老得多。大多数反对3C58年轻的有力证据在很大程度上依赖于HI吸收测量确定的3.2 kpc的假设距离。我已经重新审视了这个距离的测定基于新的HI数据从加拿大银河平面调查，并增加了新确定的距离在附近的对象，这是基于直接测量三角视差。这导致了一个新的更可靠的距离估计为2千秒差距的3C58，并使脉冲星风星云和公元1181年的历史事件之间的联系再次更加引人注目。
英文摘要：
There is a growing community of astronomers presenting evidence that the pulsar wind nebula 3C58 is much older than the connection with the historical supernova of A.D 1181 would indicate. Most of the strong evidence against a young age for 3C58 relies heavily on the assumed distance of 3.2 kpc determined with HI absorption measurements. I have revisited this distance determination based on new HI data from the Canadian Galactic Plane Survey and added newly determined distances to objects in the neighbourhood, which are based on direct measurements by trigonometric parallax. This leads to a new more reliable distance estimate of 2 kpc for 3C58 and makes the connection between the pulsar wind nebula and the historical event from A.D. 1181 once again much more compelling.
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