Quote:
Originally Posted by Robh
Ron, Most interesting.
How liberally is the word "galaxy" being used here? There is no suggestion that a dark matter galaxy would consist of something analagous to stars.
The implications of the existence of a small dark matter galaxy are enormous.
It is assumed that dark matter interacts only weakly with other matter and primarily through gravitational forces due to mass. So does dark matter exhibit similar gravitational organisation (e.g. core and disk or elliptical shape) to a normal rotating galaxy? How much influence would several of these dark matter galaxies have on the structure of a "hosting" normal galaxy in proximity?
If there is so much dark matter then one would think that there would have to be dark matter super-sized galaxies far bigger than the Milky Way.
Regards, Rob
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Rob my limited ability to manage sums still leaves me with the view raised in your last sentence. It would seem that the more dark matter you enlist to solve the anomalies the greater the problem becomes.
I do feel that the reliance on the prospect that dark matter exists and to settle upon such a conclusion as valid prevents consideration of alternatives or adjustment to our current understanding of gravity.
I am not at odds with GR per se but when we have to introduce dark matter as the only possible answer I feel we may be denying the opportunity of other ideas.
In my view the Pioneer anomaly must announce we have something wrong in our current understanding of gravity yet still they seek answers that must fit current science rather than accepting there is something we have not got right....the last time I checked there were many folk occupied in finding an explanation but the commonality is they all seek to fit the anomaly into current understanding which clearly has betrayed us.
alex
