Recent content by ray_mcintos

  1. ray_mcintos

    I What is column density in astronomy?

    https://iopscience.iop.org/article/10.1086/680323/pdf Section 4 in the above link, I was trying to understand the way to calculate but I am not clear about the derivation and in the section 15 there are some examples of column density calculation that one too.
  2. ray_mcintos

    I What is column density in astronomy?

    What is column density in astronomy?
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