Formation of the spiral structure in SB galaxies

被引：0

作者：

Polyachenko, VL ^{[1
]}

Polyachenko, EV ^{[1
]}

机构：

[1] Russian Acad Sci, Astron Inst, Moscow 109017, Russia

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2001年 / 27卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

galaxies; intergalactic gas;

D O I：

10.1134/1.1381610

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate regions near the ends of the principal spiral arms in SB galaxies, where the non-axially symmetric part of the gravitational potential rapidly transforms to its asymptotic quadrupole form. The galactic disk responds to this transformation of the potential by forming nearly circular spirals with an angular extent of the order of pi /2 (quarter-turn spirals). We consider the resonance mechanism for the formation of principal spirals. Expressions are derived for the resonance responses of disks with circular and nearly circular stellar orbits. (C) 2001 MAIK "Nauka/Interperiodica".

引用

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页码：421 / 439

页数：19

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