distance ckpc/h

David Wang
  • 21 Jun

Hi there,
I am wondering about the definition of ckpc/h. I am aware that h is a constant, is ckpc speed of light times kpc?

Dylan Nelson
  • 21 Jun

Hi David,

The "c" means "comoving", as opposed to physical. To convert a length from ckpc/h to "physical kpc" you should divide by h and multiply by a (the scalefactor, = 1.0 at z=0).

David Wang
  • 21 Jun

Thank you!

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