Dark matter exists: Observations disprove alternate explanations

By International School of Advanced Studies (SISSA)

Acceleration as a function of radius in NGC 4455, one of the studied galaxies. Credit: Di Paolo et al. modified from survey SDSS9.

As fascinating as it is mysterious, dark matter is one of the greatest enigmas of astrophysics and cosmology. It is thought to account for 90 percent of the matter in the universe, but its existence has been demonstrated only indirectly, and has recently been called into question. New research conducted by SISSA removes the recent doubts on the presence of dark matter within galaxies, disproving the empirical relations in support of alternative theories. The study, published in the Astrophysical Journal, also offers new insights into understanding the nature of dark matter and its relationship with ordinary matter.

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