AN EXTREMELY HIGH-VELOCITY MULTIPOLAR OUTFLOW AROUND IRAS-20050+2720

被引:17
作者
BACHILLER, R [1 ]
FUENTE, A [1 ]
TAFALLA, M [1 ]
机构
[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138
关键词
ISM; INDIVIDUAL; (IRAS; 20050+2027); JETS AND OUTFLOWS; MOLECULES; RADIO LINES; STARS; FORMATION;
D O I
10.1086/187887
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report high angular resolution maps in the CO 2 --> 1 and CS 3 --> 2 lines of the molecular gas around the embedded object IRAS 20050+2027. This is a 260 L. source located in the Cygnus Rift at 700 pc from the Sun. The CS data uncover a dense core of size 0.3 pc and 80 M. centered on the IRAS object. The CO map reveals a remarkable molecular outflow consisting of three pairs of lobes emanating from the close vicinity of the IRAS source. One of the lobe pairs is a highly collimated jet of extremely high velocity emission (LSR velocities up to +70 km s(-1)) containing molecular ''bullets.'' We briefly examine different possibilities to explain the complex structure of the multipolar outflow. A single outflow appears unable to explain all the CO observations, so we suggest that two or three independent outflows emanate from different young sources embedded within the core.
引用
收藏
页码:L51 / L54
页数:4
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