On Saturday, December 9, 2017 at 2:08:05 PM UTC, Russell Standish wrote: > > On Sat, Dec 09, 2017 at 05:34:29AM -0800, [email protected] > <javascript:> wrote: > > > > I think you're making the unwarranted assumption that the measured shift > in > > H is not > > effected by the cosmological red shift which presumably shifts all wave > > lengths. AG > > Yes - all spectral lines are shifted by the same amount. But the lines > are recognisable by the patterns - a bit like a bar code. >
But you don't know which part of the shift of the H is due to cosmological expansion, so that's why the method I described seems necessary. You must estimate how much is due to expansion alone via distance knowledge and Hubble's law, and then calculate the difference between the total H red shift and what expansion would give in the absence of Doppler, to get the actual Doppler shift. AG > > > -- > > ---------------------------------------------------------------------------- > > Dr Russell Standish Phone 0425 253119 (mobile) > Principal, High Performance Coders > Visiting Senior Research Fellow [email protected] > <javascript:> > Economics, Kingston University http://www.hpcoders.com.au > ---------------------------------------------------------------------------- > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
