2021-10-11

Modern cosmology simulates a supermassive black hole (SMBH) wandering in the universe

By yqqlm yqqlm

Modern cosmology simulates a supermassive black hole (SMBH) wandering in the universe

when matter enters the center of the Milky way and increases to SMBH, an active galactic nucleus (AGN) will be produced; Then the outflow or other feedback of AGN will destructively inhibit star formation in galaxies. Modern cosmological simulations can now self consistently track star formation and SMBH growth in galaxies. The process from the early universe to the present confirms these ideas

the merging process naturally causes some SMBHs to shift slightly from the center of the expanded galaxy. The path to a single, consolidated SMBH is complex. Sometimes a twin SMBH is formed first, and then gradually merged into one. In this process, detectable gravitational wave emission can be generated. However, mergers sometimes stagnate or are destroyed — understanding why is one of the key challenges in SMBH evolution. The new cosmological simulation using Romulus code predicts that even after billions of years of evolution, some SMBHs will not join the core, but will eventually wander in the Milky way

Angelo ricarte, an astronomer at

CFA, led a team of colleagues to describe this wandering black hole. Using Romulus simulation, the team found that in today’s universe (about 13.7 billion years after the big bang), about 10% of the mass of black holes may be on rogues. In the early days of the universe, 2 billion years or less after the big bang, these vagrants seemed to be more important, including most of the mass in black holes

in fact, scientists found that in these early times, Rangers also produced most of the launches from SMBH groups. In a related paper, astronomers explored the observational characteristics of the wandering SMBH group