> -----Original Message----- > From: brin-l-boun...@mccmedia.com [mailto:brin-l-boun...@mccmedia.com] On > Behalf Of KZK > Sent: Friday, October 23, 2009 12:11 PM > To: brin-l@mccmedia.com > Subject: RE: Br!n: Dark Matter / Energy in Doubt > > I don't dispute anything you write, except for this. Forgive me if I am > mistaken, but my understanding was that they did not in fact have to > modify the MOG theory in order to explain the data in the case of the > bullet cluster. The paper seemed quite clear on this point. In fact > the whole reason I pointed out the paper in the first place, and what > makes it so interesting, is that they didn't have to change any of the > parameters of the theory in order to explain the Bullet cluster, whereas > Modified Newtonian Dynamics (MOND) was apparently eviscerated by the > bullet cluster data.
Maybe Richard can weigh in on this because he was a boffin in a former life; not just a plumber. But, if they set their parameters using earlier observations, then I would think they would be very clear about what those parameters were, and how they set them. If you look at landmark papers, such as the first observations of charm, while they can be understated, to a physicist reading their paper the results stand out clearly as if they were in 50 pt Bold. I don't get that with this paper, but maybe I'm missing something. Where do they state the earlier data that they used to set their parameters? Second, it seems clear from the sites I quoted that they had to change their parameters to match later observations. Third, folks who tried to work the progress of the clusters from before collision through the collision using their theory needed very specific preconditions to obtain the results. > Seems to me that if neutrino's oscillate between having mass and not > having mass, That's not what neutrino oscillation is. It is oscillation between different type of neutrinos, from electron neutrinos to muon or tau neutrinos. It is akin to kaon oscillations, where a K0 is produced, but a K0-bar can be observed. It's kinda neat physics, with production and interactions are kaons (down,strange-bar) or kaon-bars (down-bar,strange), but transport occurs with K-short: [(down,strange-bar)- (down-bar,strange)]/sqrt(2) and K-long: [(down,strange-bar)+ (down-bar,strange)]/sqrt(2) > that they would oscillate between being bound by gravity > and moving in a straight line, ah, light is bent, and it has no mass....but it has relativistic mass. FWIW, although one can do it either way, the convention now is to call rest mass "mass" and to just see relativistic mass as E/c^2. Dan M. _______________________________________________ http://mccmedia.com/mailman/listinfo/brin-l_mccmedia.com
