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Gravitational lensing

  1. Apr 19, 2013 #1
    1. The problem statement, all variables and given/known data
    I'm studying about gravitational lensing and got stuck on an article:

    http://arxiv.org/pdf/0708.2684v1.pdf

    where the equation 2.1 is abit strange to me. The authour uses the reference

    http://arxiv.org/pdf/astro-ph/9703103v1.pdf

    for deriving the equation.

    According to me, the sum on equation is extremly similar to Gravitational Potential.


    2. Relevant equations

    Equation 1 has the form w = z - Ʃsigma/(bar(z)-bar(zj)) and the gravitational potential is given in http://en.wikipedia.org/wiki/Gravitational_potential as Ʃ-Gmi/(x-xi)

    3. The attempt at a solution
    I think that the complex sum in 2.1 is the same as gravitational potential.

    My question is if this is true? Or do I need to do some more research about the derivation?
     
  2. jcsd
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