There are mysterious emissions in the giant bubbles that blow out by our galaxy.
Researchers used data from the space telescopes to look for the source of the bright emission spots in the Fermi bubbles.
The bright spot dubbed the "Fermi cocoon" is located in the southern bubble and is caused by emissions from dead stars. The finding could shed light on how the collapsed dead stars act as particle accelerators.
Astronomers spot a bright star outside of the Milky Way.
There is a possibility of dark matter annihilation. Particles accelerated by pulsars may not be evidence of dark Matter.
There are streams of gas and stars that were ripped from the core of the galaxy as it was threaded through the disk of the Milky Way.
Young stars, dark matter annihilation, and millisecond pulsars are thought to be the culprits behind the creation of gamma-ray emissions. The violent gas removal means that the Sagittarius dwarf galaxy is no longer forming stars, so it can't be the result of young stars.
Dark matter is ruled out as a source of emissions because of the shape of the Fermi cocoon. The shape of the cocoon would be affected by dark matter. The only possible source of the powerful radiation was a population of millisecond pulsars, which spin hundreds of times per second.
There is only one way to see rapidly spinning objects called'millisecond pulsars', according to the team. The Sagittarius dwarf's millisecond pulsars were the ultimate source of the mystery.
A pulsar is formed when a star that is much larger than the sun is no longer able to carry out nuclear fusion in its core. It can't support itself against complete collapse. A city-sized star with a mass around that of the sun is left behind by the collapse of the universe. A portion of this stellar remnant is so dense that it would weigh four billion tons.
The accretion of matter from a companion star is thought to be the cause of the rapid rotation of millisecond pulsars.
The poles of pulsars blast out electrons and positrons. The electrons give some of their energy when they interact with low-energy photons in the Cosmic Microwave Background. The energy of the gamma-ray photons is increased.
The team's results show that the gamma-ray emissions are not the result of dark matter.
Oscar Macias, a researcher at the University of Amsterdam, said that this is significant because dark matter researchers have long believed that an observation of a dwarf satellite would be a smoking gun.
The research was published in Nature Astronomy.
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