I would ask, as red and blue shift measurements are consistent at closer distances where other measurements can be made along with them to test their agreement, at what distance, do these “other” effects appear? And wouldn’t a variance suggest first an inconsistency with the new model, rather than a rejection of the earlier, well established physical standards?
And that being relatively alone in the physics community - not that that’s always the sole criterion as to the validity of an idea by any means - though it usually means that one’s work has been “weighed, and found wanting”.
>>And wouldn’t a variance suggest first an inconsistency with the new model . . . ?<<
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I am not aware that Arp has presented a new model, just refuted the old one, for anyone willing to look with their own eyes at the photographic evidence.
Incidentally, his credentials are impeccable.
Of course referring to Thomas Kuhn in such discussions is almost a cliche . . . but, I happen to think his “Structure of Scientific Revolutions” is one of the great books. It clearly identifies the phases for overthrow of old theories beginning with ammassing of anomolous observations. SUMMARY of the process: IT AIN’T EASY.