...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Trigonometric parallax measurement of a water maser source toward the SgrD HII region
【24h】

Trigonometric parallax measurement of a water maser source toward the SgrD HII region

机译：三角视视对SGRD HII地区的水域来源的测量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report on VLBI observations of a water maser source associated with the SgrD HII region, which is a bright radio continuum source in the direction of the Galactic center region. The absolute proper motions and the distance measured by VLBI Exploration of Radio Astrometry (VERA) were (mu(alpha) cos delta, mu(delta)) = (-1.32 +/- 0.15 mas yr(-1), -2.86 +/- 0.34 mas yr(-1)) and d = 2.36(-0.39)(+0.58) kpc, respectively. The line-of-sight velocity of the water maser emission is similar to that of the H91 alpha recombination line emission detected at the SgrD H II region. The spatial position and line-of-sight velocity of the water maser emission indicate that this source is physically associated with the extended HII source seen under radio continuum observations. Thus, our results suggest that the SgrD HII region is located in the Scutum arm of the Galactic disk. We discuss this new view of the SgrD complex, based on the parallax and proper motions.
机译：我们报告与SGRD HII区域相关的水爆发源的VLBI观察，这是银河中心区域方向的明亮无线电连续源。 通过VLBI探索无线电天空测量（VERA）的绝对适当的运动和测量的距离是（mU（alpha）cosδ，mu（delta））=（-1.32 +/- 0.15 mas yr（-1），-2.86 + / - 0.34 mas Yr（-1））和d = 2.36（-0.39）（+ 0.58）KPC。 水爆发发射的视线速度类似于在SGRD H II区域检测到的H91α重组线发射的速度。 水爆发发射的空间位置和视线速度表明该来源与在无线电连续概念观测下看到的扩展HII源有关。 因此，我们的结果表明SGRD HII区域位于银芯片的裂缝臂中。 我们根据视差和适当的运动讨论SGRD复合体的新视图。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号