EVIDENCE FOR LARGE-SCALE EXPANDING MOTIONS WITHIN THE ORION A MOLECULAR CLOUD

被引：31
|
作者：
HEYER, MH
MORGAN, J
SCHLOERB, FP
SNELL, RL
GOLDSMITH, PF
机构：
[1] Five Coll. Radio Astron. Observatory, University of Massachusetts, Amherst
来源：
ASTROPHYSICAL JOURNAL | 1992年 / 395卷 / 02期
关键词：
ISM; BUBBLES; CLOUDS; INDIVIDUAL (ORION NEBULA); JETS AND OUTFLOWS; KINEMATICS AND DYNAMICS; MOLECULES;
D O I：
10.1086/186497
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Images of the Orion A molecular cloud constructed from spectra of (CO)-C-12 J = 1-0 emission observed with the FCRAO 14 m antenna are presented. An inspection of the kinematics of the Orion A cloud reveals several regions with large-scale expanding motions manifest by nearly circular emission features with radii 10'-26' (1.0-2.6 pc) and secondary velocity components which are shifted 2-3 km s-1 from the ambient cloud velocity. The presence of these large-scale features, which partially overlap with each other in projection, suggests that the diffuse molecular component of the Orion A cloud as traced by CO emission has been significantly disrupted by events associated with the energetic star forming activity within its domain.
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页码：L99 / &
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