Scientists have discovered that the metal content of high-velocity Fermi bubble clouds (HVCS FB) does not match
In the article, scientists noted that there is notmany studies on the composition of HVCS FB. However, many assume that the clouds are composed of material ejected from stellar disks near the Fermi bubbles, or material from a black hole at the center of the galaxy. In the new work, the researchers took a closer look at HVCS FBs to learn more about their composition.
The main goal of the researchers' work wasdetermination of the ratio of metals in clouds. If these rates were consistent with other materials nearby, it would support theories of the localized origin of HVCS FB.
However, analyzing both new and archivaldata from several telescopes, the researchers found that in many cases there were no matches. This means that at least some of the material in the clouds must have come from more distant places. Perhaps even from a halo - a cloud of gases that surrounds the galaxy.
Fermi bubbles spanning 25,000 lightyears each, are on both sides of the plane of the galaxy and emit x-rays and gamma rays. The reason for their occurrence could be relativistic jets from a supermassive black hole, which was active 5-6 million years ago. In another scenario, a burst of star formation in a cloud of molecular gas around a black hole could trigger Type II supernova explosions and generate powerful stellar winds.
Read more:
Physicists have found a universal "clock" in space: they are more accurate than atomic
Archaeologists have found drawings of creepy people with huge heads: who they were
The James Webb telescope took the first picture of Jupiter: it shows 9 moving targets at once