In the center of the galaxy NGC 2356 found a huge amount of dark matter
A new study by astronomers suggests that the galaxy NGC 2356 has a significant amount of dark matter in their central region. The work presented in the preprint on arXiv.org on October 2, can challenge the theory of modified Newtonian dynamics. Located 114 million light-years away in the complex supercluster Hydra-Centaurus galaxy NGC 2356 - a bright infrared galaxies (LIRG), one of the brightest galaxies nearby and is the brightest galaxy in infrared light that is within the red shift of 0, 01 on the Earth .
NGC 3256 formed from the merger of two gas-rich disk galaxies, facing almost face to face. These properties make LIRG excellent target for studying dark matter.
How much dark matter to you?
"We examined the distribution of the central mass in NGC 3256 bright infrared galaxies at a distance of 35 Mpc, using observations of CO (1-0) Atacama large millimeter and submillimeter Array (ALMA) and 2MASS near-infrared light data," write the researchers led by Isry Abdulhazima Mohammed Ali.
Analysis of available data allowed scientists to determine the distribution of mass in NGC 2356. It was found that a significant amount of invisible dynamic mass (about 48 billion solar masses) located in the central region of the galaxy. Ratio invisible weight totaled about 87% of the dynamic.
According to the authors, a number of invisible mass can not be explained by the molecular mass and the stellar mass in the central region. Therefore, they suggest that unseen mass, probably due to the presence of dark matter.
"The amount of dark matter is about 4.84 ± 0.42 * 10 10 solar masses, which certainly exceeds the mass of the star. This galaxy requires the existence of a huge amount of dark matter in the central region. "
"What is more important is the fact that the problem of the missing mass is impossible to explain the traditional theory of modified Newtonian dynamics due to the strong acceleration in the central region of the galaxy. Accordingly, the dark matter in the centers of galaxies poses a serious challenge to traditional models of MOND. "
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