First Mapping Observations of Two Possible Cloud Collision Candidates IRAS 02459+6029 and 05363+3127  

作　　者：Bei Xin Jun-Jie Wang 

机构地区：[1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

出　　处：《Chinese Journal of Astronomy and Astrophysics》2008年第4期433-438,共6页中国天文和天体物理学报（英文版）

基　　金：the National Natural Science Foundation of China(No.10473014)

摘　　要：The first mapping observations of the cold infrared sources IRAS 02459＋6029 and 05363＋3127 in the molecular lines ^12CO（1-0））, ^13CO（1-0） and C^18O（1-0） were made using the 13.7 m millimeter wave telescope in Qinghai. Both the integrated intensity maps and position-velocity diagrams show that each has two components adjacent in both space and velocity which means possible cloud-cloud collisions in the two regions. The near-infrared color-color diagram from the 2MASS database reveals that the density of YSOs in the colliding site is much higher than in the surrounding regions. The results appear to indicate that star forming activities have taken place in the two regions due to the cloud-cloud collision. We conclude that both sources are cloud collision candidates.The first mapping observations of the cold infrared sources IRAS 02459＋6029 and 05363＋3127 in the molecular lines ^12CO（1-0））, ^13CO（1-0） and C^18O（1-0） were made using the 13.7 m millimeter wave telescope in Qinghai. Both the integrated intensity maps and position-velocity diagrams show that each has two components adjacent in both space and velocity which means possible cloud-cloud collisions in the two regions. The near-infrared color-color diagram from the 2MASS database reveals that the density of YSOs in the colliding site is much higher than in the surrounding regions. The results appear to indicate that star forming activities have taken place in the two regions due to the cloud-cloud collision. We conclude that both sources are cloud collision candidates.

关 键 词：STARS formation - ISM CLOUDS 

分 类 号：P172[天文地球—天文学]