Scientists’ current best theories about the arrangement of the cosmos suggest that small galaxies should be distributed around their host galaxies in seemingly random orbits.
But observations have found that these smaller galaxies arrange themselves in thin disks around their hosts, Vice reports, not unlike Saturn’s rings. Needless to say, that represents a puzzling gap between knowledge and theory.
Researchers are now trying to reconcile this gap by suggesting smaller galaxies may be conforming to invisible “walls” created by a new class of particles called symmetrons — a fascinating proposal that could rewrite the laws of astrophysics.
The standard theory, known as the Lambda cold dark matter (Lambda-CDM) model suggests that the universe is made up of three key elements: the cosmological constant, which is a coefficient added by Einstein to explain his equations of general relativity, cold dark matter which are slow moving theoretical particles that don’t emit radiation, and the conventional matter we interact with every day.
That theory suggests that smaller galaxies should be captured by the gravitational pull of larger host galaxies and forced into chaotic orbits, something that has not been reflected in real world observations.
Now, two researchers from the University of Nottingham may have come up with an explanation, as detailed in a new, yet-to-be-peer-reviewed study.
They suggest a “fifth force” could be arranging the galaxies into disk shapes, while still considering the existence of dark matter, the mysterious substance that appears to make up the vast majority of the universe’s mass. READ MORE...
