Tuesday, October 18, 2022

Dwarf galaxies do not have dark matter halo

Evidence for the failure of dark halo model has been steadily accumulating during years. The popular article New Discovery Indicates an Alternative Gravity Theory published in SciTechDaily tells of the most recent discovery challenging the halo model. The dwarf galaxies of one of Earth s closest galaxy clusters do not behave as the halo model predicts.

Elena Asencio, a Ph.D. student at the University of Bonn was the lead author of the article "The distribution and morphologies of Fornax Cluster dwarf galaxies suggest they lack dark matter by Elena Asencio, Indranil Banik, Steffen Mieske, Aku Venhola, Pavel Kroupa and Hongsheng Zhao published in 25 June 2022, Monthly Notices of the Royal Astronomical Society (see this.

The presence of dark matter halo surrounding dwarf galaxy shields the dwarf galaxy from tidal forces by acting as a kind of matress. What was found was that the tidal forces are too large to be consistent with the presence of dark matter halo. In the TGD framework, dark matter halo is replaced with a long cosmic string producing automatically the flat velocity spectrum. There is no shielding.

See the article Cosmic string model for the formation of galaxies and stars or the chapter with the same title.

For a summary of earlier postings see Latest progress in TGD.

Articles related to TGD.

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