New high-velocity bipolar outflows in S39 and IRAS 06306+0232  

作　　者：秦胜利 吴月芳 

出　　处：《Science China Mathematics》2002年第4期538-544,共7页中国科学：数学（英文版）

基　　金：This work was supported by NKBRSF, the National Natural Science Foundation of China (Grant Nos. 10133020, 10128306 & 19773002) ; the United Astronomy Laboratory of CAS.

摘　　要：Mapping observations in12CO J = 1 - 0 lines were made towards S39 and IRAS 06306 + 0232 with the 13.7 m radio telescope at Qinghai Station of Purple Mountain Observatory. The results showed that both of them have bipolar outflows. We have calculated the outflow parameters. The outflows have significantly more mass and higher mass loss rate than those from low mass YSOs. We also find that although the bolometric luminosities of the associated sources are large, the radiation pressure of wind is not sufficient to drive the observed outflows. There exist several stars of different evolve states in S39. It suggests that the star formation in S39 is in sequence, not in eruption.Mapping observations in 12CO J = 1 - 0 lines were made towards S39 and IRAS 06306+0232 with the 13.7 m radio telescope at Qinghai Station of Purple Mountain Observatory. The results showed that both of them have bipolar outflows. We have calculated the outflow parameters. The outflows have significantly more mass and higher mass loss rate than those from Iow mass YSOs. We also find that although the bolometric luminosities of the associated sources are large, the radiation pressure of wind is not sufficient to drive the observed outflows. There exist several stars of different evolve states in S39. It suggests that the star formation in S39 is in sequence, not in eruption.

关 键 词：INTERSTELLAR medium  jets and outflows  STAR formation. 

分 类 号：P141[天文地球—天体物理]