Re: helio vs. cmb redshifts

From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Sun Mar 16 2003 - 14:14:03 PST

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

    On Sun, Mar 16, 2003 at 12:54:16PM -0800, Alex Conley wrote:
    > You fit the stretch in the helio frame, then fit a stretch/luminosity
    > correction (alpha) during your cosmology fit in the CMB frame. Then
    > you correct your luminosities using alpha*stretch.

    Er, stretch is just the parameter that describes how slowed down the
    lightcurve decay is, *not* including any slowdown due to redshift.

    Whereever that redshift comes from.

    Thus, *really*, I ought to use earth-centered redshifts, but helocentric
    is close enough.

    -Rob 

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

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