Gravitational waves could shed light on dark matter

ScienceDaily | 10/22/2018 | Staff
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Scientists from the Center for Theoretical Astrophysics and Cosmology of the University of Zurich, together with colleagues from Greece and Canada, have now found that LISA will not only be able to measure these previously unstudied waves, but could also help to unveil secrets about another mysterious part of the universe: dark matter.

Dark matter particles are thought to account for approx. 85% of the matter in the universe. However, they are still only hypothetical -- the name refers to their "hiding" from all previous attempts to see, let alone study them. But calculations show that many galaxies would be torn apart instead of rotating if they weren't held together by a large amount of dark matter.

Galaxies - Galaxies - Faint - Universe - Astrophysicists

That is especially true for dwarf galaxies. While such galaxies are small and faint, they are also the most abundant in the universe. What makes them particularly interesting for astrophysicists is that their structures are dominated by dark matter, making them "natural laboratories" for studying this elusive form of matter.

As reported in Astrophysical Journal Letters, high-resolution computer simulations of the birth of dwarf galaxies, designed and carried out by UZH PhD student Tomas Ramfal, yielded surprising results. Calculating the interplay of dark matter, stars and the...
(Excerpt) Read more at: ScienceDaily
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