Prestellar cores: initial orbit and boundary

被引：1
|
作者：
Horedt, G. P. [1 ]
机构：
[1] Kronwinkler 50, D-81245 Munich, Germany
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2016年 / 361卷 / 06期
关键词：
ISM: clouds; Evolution; Kinematics and dynamics; Stars: formation; RESTRICTED 3-BODY PROBLEM; SEGREGATION; ORIGIN; STARS;
D O I：
10.1007/s10509-016-2777-1
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The initial orbit of a prestellar core in the resisting intercore medium is found to be an elliptic spiral round the mass centre of the parent molecular cloud (clump), with exponentially decreasing semiaxes, high constant eccentricity, and constant period. Prestellar cores are stable against perturbations caused by the parent cloud, if the corresponding mean density contrast is larger than about 10. This value defines the safe boundary of a prestellar core within its parent cloud and is in accordance with observations.
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页数：7
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