在Orion－KL中的OH脉泽的外流模型：多重分离的旋转膨胀环  

The Out-Flow Model of OH Maser in Orion-KL:Multi-Distinct Rotating and Expanding Rings

作　　者：俞志尧[1] 

机构地区：[1]中国科学院上海天文台

出　　处：《天体物理学报》1994年第1期66-71,共6页

摘　　要：我们从对Ｏｒｉｏｎ－ＫＬ星云中ＯＨ１６６５ＭＨｚ脉泽的单基线干涉观测的分析中，提出一种新的外流模型，即多重分离的旋转膨胀环．这种模型与观测结果是一致的．通过对２４ｋｍ单基线观测得到的１９个ＯＨ１６６５ＭＨｚ脉泽斑点的相对位置图进行分析、统计、拟合和计算，得到这１９个ＯＨ１６６５ＭＨｚ脉泽斑点分别分布在三个旋转膨胀环上．这三个旋转膨胀环的视距分别为３＂．８１，５＂．８７，６＂．０；对应的环半径分别为１７４２，２７２０，２７６６ＡＵ；径向膨胀速度分别为７．０７，１６．４，２６．４ｋｍｓ－１；旋转运动的切向线速度分别为１．５５，１．２３，１．２１ｋｍｓ－１．We have taken a new out-flow model,i.e.multi-distinct rotating and expanding rings,from analysis of single-baseline interferometer observation of OH 1665 MHz maser in Orion-KL nebulae.This model is consistent with the observation.After analysis,statistics,fitting,and computation for the relative position map,we have obtained that the nineteen OH 1665MHz maser spots are distributed on three distinct rotating and expanding rings.Their projected distances of radii are 3.'81,5.'87,6.'0; corresponding to radii of ring 1742,2720,2766 AU;their radial expanding velocities are 7.07, 16.4,26.4kms-1;their tangential linear velocities of rotation are l.55,1.23,l.21kms-1;respectively.

关 键 词：Orion-KL星云 脉泽 外流模型 

分 类 号：P155.22[天文地球—天文学]