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.