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Crashing Galaxies Shed New Light on Dark Matter Mystery

Dark matter competence not be partial of a “dark sector” of particles that mirrors unchanging matter, as some theories suggest, according to scientists study collisions of star clusters.

When clusters of galaxies collide, a prohibited gas that fills a space between a stars in those galaxies also collides and splatters in all directions with a suit same to splashes of water. Dark matter creates adult about 90 percent of a matter in star clusters: Does it splatter like H2O as well?

New investigate suggests that it doesn’t, and this anticipating boundary a kinds of particles that can make adult dim matter. Specifically, a authors of a newly published investigate contend it’s doubtful that dim matter is partial of an whole “dark sector” — a counterpart chronicle of a manifest universe. [Infographic: Dark Matter Mystery Explained]

David Harvey, a postdoctoral researcher during a Swiss Federal Institute of Technology Lausanne, is one of many scientists now perplexing to figure out what dim matter is done of. There are lots of ways to go about this, and Harvey motionless to see what happens when dim matter collides with itself.

To do this, Harvey and his colleagues during a University of Edinburgh, where Harvey did his Ph.D. work, looked during collisions involving whole clusters of galaxies, where as most as 90 percent of a mass concerned in a collision is dim matter.

The researchers collected information on 30 galaxy-cluster collisions, drawn from observations by a Hubble Space Telescope and Chandra X-ray Observatory. They traced a transformation of dim matter by looking for gravitational lensing effects. That’s how they dynamic that a dim matter didn’t splatter. [Chandra Observatory’s X-ray Universe in Photos]

The commentary tell scientists something about what dim matter competence be done of — or some-more precisely, what it’s substantially not done of. “Chances are that dim matter is not done adult of dim protons interacting with dim protons, and chances are, there is not a counterpart star out there with these dim particles,” Harvey said.

— Calla Cofield, Space.com

This is a precipitated chronicle of a news from Space.com. Read a full report. Follow Calla Cofield @callacofield. Follow us @Spacedotcom, Facebook and Google+.

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