期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 447, 期 4, 页码 3824-3831出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu2661
关键词
ISM: individual objects: North Polar Spur; ISM: individual objects: Aquila Rift; ISM: kinematics and dynamics; Galaxy: centre; radio lines: ISM; X-rays: diffuse background
Soft X-ray intensity at 0.89 keV along the North Polar Spur (NPS) is shown to follow the extinction law due to the interstellar gas in the Aquila Rift by analysing the ROSAT archival data, which proves that the NPS is located behind the rift. The Aquila-Serpens molecular clouds, where the X-ray optical depth exceeds unity, are shown to have a mean LSR velocity of v = 7.33 +/- 1.94 km s(-1), corresponding to a kinematic distance of r = 0.642 +/- 0.174 kpc. Assuming a shell structure, a lower limit of the distance to NPS is derived to be 1.01 +/- 0.25 kpc, with the shell centre being located farther than 1.1 kpc. Based on the distance estimation, we argue that the NPS is a Galactic halo object.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据