Simultaneous stellar and galactic action

被引:15
作者
Dybczynski, PA [1 ]
机构
[1] Adam Mickiewicz Univ Poznan, Astron Observ, PL-60286 Poznan, Poland
来源
ASTRONOMY & ASTROPHYSICS | 2005年 / 441卷 / 02期
关键词
comets : general; Oort cloud; solar system : general;
D O I
10.1051/0004-6361:20053327
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This is the second in a series of papers presenting an attempt to reproduce the mechanisms acting currently on the Oort cloud of comets (Oort 1950, Bull. Astron. Inst. Nether., 11, 91) and producing the observed sample of long-period comets. We combine the effect of the close, recent stellar passage with the continuous action of the Galactic tidal perturbation, and concentrate on the dominant term of this effect, namely the tidal force induced by the galactic disk matter. The main results presented in the previous paper of this series are fully confirmed within a much more realistic model. The results we obtained is that the observable subpopulation of the Oort cometary cloud remained the same in number, even after the close stellar passage. The main output of such a passage is a short time variation in the observable influx of comets and strong asymmetries present in their perihelion direction distribution.
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页码:783 / 790
页数:8
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