论文标题
高速云Mi的起源和距离
The Origin and Distance of the High-Velocity Cloud MI
论文作者
论文摘要
高速，中性氢特征称为MI的特征可能是大约100，000年前的超新星的结果，其距离为163 PC。低速HI数据显示了一个清晰的空腔，这是一种结构，指示旧爆炸恒星撤离区域，以Mi的空间坐标为中心，（L，B）=（165o，65.O5）。黄色巨星的无形伴侣，56乌尔萨·马利木斯（Ursae Majoris）可能是超新星的遗体，疏散了腔，并以120 km/s的速度向外爆炸了MI本身。 MI的质量和能量很容易与超新星的期望。 Rosat看到的X射线与由此产生的弓冲击中的起源一致。具有讽刺意味的是，MI的这种情况仅仅是因为我们沿高速云方向探索了低速气体。
The high-velocity, neutral hydrogen feature known as MI may be the result of a supernova that took place about 100,000 years ago at a distance of 163 pc. Low-velocity HI data show a clear cavity, a structure indicative of regions evacuated by old exploding stars, centered on the spatial coordinates of MI, (l,b) = (165o, 65.o5). The invisible companion of the yellow giant star, 56 Ursae Majoris, may be the remains of the supernova that evacuated the cavity and blasted MI itself outward at 120 km/s. The mass and energy of MI are easily in line with what is expected from a supernova. The X-rays seen by ROSAT are consistent with an origin in the resulting bow shock. Ironically, this scenario for MI only came together because we were exploring low-velocity gas in the direction of high-velocity clouds.
