Black holes in the center of large galaxies heat the incoming gas, not letting it cool off, settle down and form stars.
Giant black hole located in the center of most large galaxies affect their evolution and stop the star formation. To such conclusion the group of scientists, leading Slanovskiy digital sky survey. The results are published in the journal Nature.
An international group of scientists, which includes employee of the State astronomical Institute named after Sternberg (Sternberg astronomical Institute), Dmitry Bizyaev, found examples of how giant black holes in the center of large galaxies heat the incoming gas, not letting it cool off, settle down and form stars.
In their work, the researchers looked at several star clusters, studied by a team of nearby galaxies survey MaNGA (Mapping Nearby Galaxies at Apache Point Observatory). Astronomers have discovered large galaxies located at a passive stage of evolution (the so-called “red and passive”), in which stars are born and there is no gas.
“Panoramic spectroscopy allowed us to see the flows of preheated gas, which in the form of broad cones hit from the centres of these galaxies. Building material are: it is seen that the gas comes from intergalactic space, but do not have time to cool, settle and form stars, and ejected from the system due to the activity of the Central object,” explained Bizyaev.
The prototype of such objects is a pair of galaxies, which astronomers from MaNGA gave their own names — Akira and Tetsuo (in honor of the heroes of Japanese manga “Akira”). Tetsuo — Akira low-mass component. Scientists noticed that the cold gas from the galaxy-the satellite falls on the main galaxy with star formation. However, the Central supermassive black hole heats up and throws him back into intergalactic space.
The authors call this effect “red geyser” and suggest that it may be one of the typical mechanisms that regulate the inflow and outflow of gas, and most importantly — suppress star formation in galaxies. This process may be activated for a short time and is probably quite common in the Universe.
