München 2019 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 14: Poster Session (posters are permanently on display)

GR 14.19: Poster

Thursday, March 21, 2019, 16:30–18:30, HS 6

What is Dark Matter? — •Albrecht Giese — Taxusweg 15, 22605 Hamburg

Dark matter is one of the great mysteries in today's physics.

There are fundamentally two solutions possible: (1) there may exist a type of presently undetected particles which provides the missing contribution to the gravitational field; (2) the theory of gravity of Newton and of Einstein which related gravitation to mass and energy may be erroneous.

For the second alternative there is a working ansatz. If one extends the Lorentzian interpretation of relativity to the area of general relativity, so to gravitation, there follows a different causality for gravity. Gravity is no longer caused by mass or energy but it is a side effect of other forces. So every elementary particle contributes to the field independently of its mass. And in this case photons and neutrinos are playing a particular role.

If the thoroughly investigated rotating galaxy NGC 3198 is taken as an example for this approach, it can be shown that the result for the amount of the field as well as its spatial distribution fits quite precisely to the measurement. And the recently detected galaxy NGC 1052-DF2, which emits dim light and has only a small amount of Dark Matter, is a good confirmation of this view.

On the other hand, the search for specific particles as an explanation of this phenomenon has up to now not yielded any hints for their existence.

Further info: www.ag-physics.org/gravity