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Say, if I downloaded the CMB frame redshifts of some galaxies from NED database, then what is the procedure to correct it for coherent flows?

I'm using the SNooPy(snpy) Python package to analyze some Type Ia supernova data collected from CSP archive. snpy provides a method called sn.get_zcmb() to collect the redshift of the SNe Ia host galaxy corrected to CMB frame from NED calculator. Now, for cosmological studies mere z_cmb isn't enough, we need to correct it for bulk coherent flow as per literature. But the procedure to correct for it isn't known to me.

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  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    Commented Apr 19, 2022 at 12:36
  • $\begingroup$ CMB frame redshifts are already corrected for large-scale flows; that’s why they have that name. $\endgroup$
    – Peter Erwin
    Commented Apr 23, 2022 at 8:56

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