Image Credit: The conversation
Dwarf galaxies are tiny, inconspicuous galaxies that are typically discovered in or nearby larger galaxies or galaxy clusters. They might thus be affected by the gravitational forces of their larger counterparts.
Elena Asencio, a Ph.D. candidate at the University of Bonn and the story's lead author, said, "We present a unique technique of verifying the standard model based on how much dwarf galaxies are disrupted by gravitational tides' from surrounding larger galaxies.
When one body's gravity pulls differentially on different parts of another body, tides result. These are similar to Earth's tides, which appear when the moon pulls harder on the side of the planet that faces the moon.
Image Credit: Museums of Science
A large number of dwarf galaxies reside in the Fornax Cluster. Numerous of these dwarfs appear to be twisted, as though the cluster environment has disturbed them, according to recent findings.
According to the Standard Model, such fluctuations in the Fornax dwarfs are not anticipated, according to Pavel Kroupa, professor at the Universities of Bonn and Prague's Charles University.
This is because the dark matter halos of these dwarfs should partially protect them from floods created by the cluster, according to the standard model.
The comparison revealed that the Fornax dwarfs should already be annihilated by the gravitational pull of the cluster centre even if the tides it creates on a dwarf are 64 times smaller than the dwarf's own self-gravity, according to Elena Asencio.
This is not only illogical, but it also goes against the findings of earlier research, according to which the amount of outside power required to perturb a dwarf galaxy is comparable to the dwarf's own gravity.
Source Credit: SciTechDaily
Edited By: Bidyut B. Gogoi ( LinkedIn )