...
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Internal motion of 6.7-GHz methanol masers in HII region S269
【24h】

Internal motion of 6.7-GHz methanol masers in HII region S269

机译:HII区域S269中6.7 GHz甲醇激射的内部运动

获取原文
获取原文并翻译 | 示例
           

摘要

We present the first internal motion measurement of the 6.7-GHz methanol maser within S269, a small HII region in the outer Galaxy, which was carried out in 2006 and 2011 using the Japanese VLBI Network (JVN). Several maser groups and weak isolated spots were detected in an area spanning ?200 mas (1000AU). Three remarkable maser groups are aligned at a position angle of 80°. Two of three maser groups were also detected by a previous observation in 1998, which allowed us to study a long-term position variation of maser spots from 1998 to 2011. The angular separation between the two groups increased by ?10 mas, which corresponds to an expansion velocity of ?10 km s ~(-1). Some velocity gradient (?10~(-2) km s~(-1) mas~(-1)) in the overall distribution was found. The internal motion between the maser groups support the hypothesis that the methanol masers in S269 could trace a bipolar outflow.
机译:我们介绍了在2006年和2011年使用日本VLBI网络(JVN)对S269(位于外银河系中的一个HII区域)进行的6.7 GHz甲醇激射器的首次内部运动测量。在200 mas(1000AU)以上的区域中检测到几个maser组和较弱的孤立点。三个卓越的maser组以80°的位置角对齐。 1998年以前的观测也发现了三个maser组中的两个,这使我们能够研究1998年至2011年maser点的长期位置变化。两组之间的角距增加了10 mas,这对应于膨胀速度约为10 km s〜(-1)。在整体分布中发现了一些速度梯度(?10〜(-2)km s〜(-1)mas〜(-1))。 maser组之间的内部运动支持以下假设:S269中的甲醇masers可以追踪到双极流出。

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