A CO mapping study of IRAS 02455+6034 region

► We discovered two clouds, with five clumps, and calculated their physical parameters. ► We propose that the two clouds may be colliding. ► We provide evidence which doesn’t support the shock passage model. A 12′×11′ mapping observation of the IRAS 02455+6034 region with 12CO, 13CO, and C18O (J=1–0...

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Bibliographic Details
Published in:New astronomy 2013-08, Vol.22, p.1-6
Main Authors: Sun, Ningchen, Wu, Yuefang
Format: Article
Language:English
Subjects:
ISM: clouds
ISM: individual
Stars: formation
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Summary:► We discovered two clouds, with five clumps, and calculated their physical parameters. ► We propose that the two clouds may be colliding. ► We provide evidence which doesn’t support the shock passage model. A 12′×11′ mapping observation of the IRAS 02455+6034 region with 12CO, 13CO, and C18O (J=1–0) lines was carried out using the 13.7m telescope of Purple Mountain Observatory. We have discovered two clouds, with two overlap regions and five clumps in total. The excitation temperature of the clumps ranges from 14 to 21K, and their mass ranges from 84 to 4100M⊙. The clouds have non-uniform velocity and turbulence fields. The overlap regions have significant star formation, and one clump is found to be sourceless. We speculate that the two clouds are colliding. The collision has a great impact on the cloud velocity field and morphology, and has enhanced the turbulence at the impacting sites; the collision is also responsible for the triggered star formation.
ISSN:1384-1076
1384-1092
DOI:10.1016/j.newast.2012.11.006