Gravitational waves may shed light on dark matter

The future Laser interferometric space antenna (LISA) will be a powerful tool that will allow astronomers to study phenomena such as colliding black holes and gravitational waves moving through space-time. Scientists from the University of Zurich have come to the conclusion that LISA will be able to shed light on elusive dark matter particles. Laser Interferometer Space Antenna will allow astrophysicists to observe gravitational waves emitted by black holes when they collide with other black holes.

LISA will consist of three spacecraft orbiting the Sun in a constant triangular formation. Gravitational waves passing through them, will slightly distort the sides of the triangle, and the minimum distortion can be detected by using laser beams connecting the spacecraft

As LISA will look for dark matter?

Scientists from the Center for theoretical astrophysics and cosmology at the University of Zurich, together with colleagues from Greece and Canada found that LISA will not only be able to measure these previously studied waves, but will also help unlock the secrets of dark matter.

I believe that dark matter particles make up approximately 85% of matter in the Universe. But their existence is not yet proven — hence the elusiveness of dark matter. Calculations show that a galaxy just would’ve bursted to pieces if I didn’t keep a large amount of dark matter.

This is especially true for dwarf galaxies. Although these galaxies are small and dim, they are also the most common in the Universe. What makes them particularly interesting for astrophysicists, is that their structures dominated by dark matter. In fact, it is a natural laboratory for the study of this unknown form of matter.

In the new study, Thomas Rampal made a computer simulation of the birth of dwarf galaxies in high resolution and got interesting results. Scientists from Zurich have discovered a strong link between the rate of merging black holes and the amount of dark matter in the center of the dwarf galaxies. The measurement of gravitational waves emitted by merging black holes may eventually point us to the properties of hypothetical dark matter particles.

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