Remove ads

造父变星型振子,1955年天文学家W.S。Krogdahl在天体物理学学报上发表《天体的搏动是一种极限环现象》[1]

Krogdahl用下列非线性常微分方程组模拟造父变星的半径随时间的变化[2]

造父变星的半径变化用下式表达:

此微分方程组无解析解,但可以用龙格-库塔法定性求得数值图解。

设参数params := a = .1*(1/3), b = .5,c=10;

初始条件:init:= x(0) = 1.1, y(0) = 0

Thumb
造父变星半径随时间之变化图
Thumb
造父变星极限环
Thumb
造父变星型振子相图
Remove ads

参考文献

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.

Remove ads