Nereid said:Thank you Chronos, a most interesting read.
This paper should allow us to put several 'association' and 'quantized z' hypotheses to sleep. Does anyone know if any serious astronomers in either of those camps are still banging those drums?
Now that some SDSS results are in the public domain, perhaps a similar piece of research could be done using those? The good news is that SDSS uses a completely different method to select objects for specta than 2dF did, so if similar analyses of the two datasets yield similar results there'll surely be no place to hide!
I particularly liked the approach taken here: a proponent in one camp suggests a method of analysis, and a neutral third party carried out the work, using publicly available data. What's good? The method and expected outcomes were clearly defined BEFORE the work was done, and the datasets are in the public domain (you don't like the conclusions? there's nothing at all stopping you from performing your own analyses!)
Yes, thank you for the link Chronos! Nereid summed up my feelings pretty well. As we discussed earlier (in this thread, I think) I feel that there is solid observational evidence for intrinsic excess redshift, but I am philosophically (intuitively, more likely) repelled by the thought that redshift might be quantized. I am prepared to accept a mechanism for excess redshift that can produce a smooth continuum of values, but quantization of redshift values in objects as apparently violent and energetic as quasars just goes against my grain. Please note the very precise reasoning (including all relevant maths) for my position.