TGD View on the Findings Challenging the Halo Model of Galactic Dark

Abstract

Bullet Cluster gives support for the existence of dark matter and can be used as an objection against MOND. Bullet cluster is however a problem also for the cold dark matter scenario. Recently several new findings challenging the halo models of galactic dark matter and suggesting that baryonic matter dominated in galaxies for about 10 Gy ago, have emerged. In this article both Bullet cluster problem and the newest findings will be discussed in TGD inspired pearls-in-necklace model assuming that galactic dark matter is in string-like objects containing galaxies along them. The gravitational field of string would automatically give rise to the constant velocity spectrum. The new findings suggest that this has not been the case for 10 Gy ago, and that bound states of galaxies and cosmic strings were formed later.