Re: helio vs. cmb redshifts

From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Sun Mar 16 2003 - 11:39:03 PST

  • Next message: Michael Wood-Vasey: "Re: helio vs. cmb redshifts"

    On Sun, Mar 16, 2003 at 11:11:24AM -0800, Alex Conley wrote:
    > I was thinking about how you are using cmb vs. heliocentric redshifts,
    > and I think you are doing it wrong in snminuit. You definitely want
    > the K-corrections to be done heliocentrically, but the stretch
    > fits should be done in the CMB frame.

    No.

    Time dilation is time dilation, whether it comes from cosmology or from
    a doppler shift. So far as the fit goes, it doesn't *care* where in the
    universe the SN is, it only case how much total time dilation there is.

    -Rob

    -- 
    --Prof. Robert Knop
      Department of Physics & Astronomy, Vanderbilt University
      robert.a.knop@vanderbilt.edu
    


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