Astrophysics estimate dark matter is 85 percent to 90 percent of all matter in the universe. Scientists, however, have largely failed to detect the mysterious material, because of its weak interaction with the electromagnetic force, with & # 39 are non-material, at best. Instead, astrophysicists could only deduce its existence from gravitational effects that appear to be of normal matter. As a result, dark matter is a hypothetical substance, probably built in the form of undiscovered subatomic particles.
This recently led some scientists to question whether the substance exists or & # 39; whether it will ever be found.
A new study published in The Astrophysical Journal, led by the International School for Advanced Studies (SISSA), seeks to dispel the doubts surrounding dark matter.
Chiara Di Paolo, a doctoral student in SISSA Astrophysics, said: "Three years ago, several colleagues Case Western Reserve University strongly challenged our understanding of the universe and in-depth work of many researchers, casts doubt on the existence of dark matter in galaxies.
"Analysis of rotation curves of galaxies 153, basically" classical "spiral type, they obtained an empirical relationship between the overall gravitational acceleration star observed, and a component that we observe in the presence of a conventional single substance in classical Newtonian theory.
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"This is an empirical relationship, which seemed to be really in all the galaxies they analyzed, and in any galaxy radius reasoned explanation of the gravitational acceleration does not necessarily call into question the dark matter, but with the participation of, for example, the theory of modified gravity, such as modified Newtonian dynamics."
According to the US space agency NASA, galaxies and dark matter go together like "peanut butter and jelly."
Astronomers believe dark matter exists in each observed galaxy and can be one of the triggers that help create the galaxy.
In effect, dark matter is believed to be the glue that contains visible matter within these galaxies together.
Because of this, astronomers were surprised in 2018 to discover the galaxy NGC-one thousand and fifty-two df2 only spent about 1 / four of the expected amount of dark matter.
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Pieter van Dokkum of Yale University said: "We thought that every galaxy has a dark matter and dark matter, the galaxy begins.
"This is an invisible and mysterious substance from the & # 39 is the most dominant aspect of any galaxy.
"So finding unexpected galaxy without it. It challenges conventional ideas about how we think galaxies work, and it shows that the dark matter is real; it has its own separate existence apart from the other components of galaxies.
"This result also shows that there may be more than one way to form a galaxy."
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The presence of dark matter in galaxies is used to explain how the stars move around and grouped together in a way that ordinary matter can not explain.
Paolo Salucci, professor of astrophysics at Sissa, said: "We studied the relationship between the total acceleration and a common component of 106 galaxies, getting different results from those that were previously observed.
"This demonstrates not only inaccuracy empirical relationship described above, but eliminates doubt the existence of dark matter in the galaxy.
"In addition, a new relationship found may provide important information for understanding the nature of an indefinite component."