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is fermi bubble exist?why?
No one knows whether they really exists or not. studies are still going on.Fermi bubbles, as they are known, are gamma ray outflows of charged particles traveling at nearly 106 m/s. They form what look like two lobes above and below the center of the Milky Way Galaxy. Some of these rays are thought to come about due to the black hole that is thought to exist at the galaxy's center. Likewise, some are also thought to come about due to material given off by stars when they explode. Taken together, however, the identified sources don't add up to produce as many of the charged particles as can be observed. This is because, the researchers theorize, some of the gamma rays are due to dark matter particles running into each other, obliterating themselves in the process. As they do so, they give rise to tau leptons and emit gamma rays. And that, they claim, adds credence to dark matter theory.


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