Calculation of Gravitational Lens:Einstein Ring.

Keyword

Einstein radius,Gravitational Lens,Einstein Ring,Newtonian constant of gravitation,Speed of Light in Vacuum,Mass of the lens,angular diameter distance.

Reference

[1]:Graham Woan著・堤正義訳:『ケンブリッジ物理公式ハンドブック』,共立出版,pp.178,2007.
[2]:Wikipedia

Remarks

・θE=4*G*M/c^2*(d2/(ds*d1)).
・G:Newtonian constant of gravitation.
・c:Speed of Light in Vacuum.
・M:Mass of the lens
・ds,d1,d2:angular diameter distance.

History

・2010/03/10:Upload.