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 '19

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).

Hi there,

I am wondering about the definition of ckpc/h. I am aware that h is a constant, is ckpc

speed of lighttimes kpc?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).Thank you!