Researchers suggest that the galaxy NGC 3256 has a significant amount of dark matter in the central region. If this is so, then a problem may arise for the modified theory of Newton's dynamics.
Remote to 114 million light years from the super-hydraulic complex Hydra-Centauri, NGC 3256 is a bright infrared galaxy (LIRG). It is one of the brightest nearest galaxies and the brightest in the IR region, located within the redshift of 0.01 from the Earth. NGC 3256 was formed by the merger of two gas-rich disk galaxies and is endowed with an almost clear orientation. Because of this, it becomes an excellent target for studying dark matter in the LIRG.
Integrated intensity pattern (mom0) of the CO (1-0) line emission in the central region of NGC 3256
Usually, such LIRGs unite galaxies regulated by fusion of halogen halos, so scientists are trying to understand whether it is possible to identify a significant amount of dark matter in the central regions of such galaxies, whose dynamic masses usually prevail in molecular masses. For the study of NGC 3256, data from the sub-millimeter array ALMA and 2MASS were used. The analysis allowed us to determine the mass distribution in the galaxy. It turned out that in the central region there is a significant amount of invisible dynamic mass (about 48 billion solar). The share of invisible mass is 87% of the dynamic.
Scientists believe that such a large amount of invisible mass can not be explained molecular and stellar in the central region. Therefore, it is believed that we are talking about dark matter, whose number reaches 4.84 ± 0.42 * 10 10 solar. Dark matter in the central regions of the galaxies is still relatively unexplored.
Astronomers usually agree that dark matter dominates the outer regions of galaxies, but is not considered an important mass component in the most internal territories. Therefore, researchers note that the new discovery can have a significant impact on the modified Newton's theory of dynamics (MOND), proposed to explain the problem of missing mass without using dark matter.