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Using a computer model of stellar evolution, researchers at Stockholm University in Sweden and Stanford University in California simulated a population of stars swirling around the Milky Way's galactic center, comparing how they evolved with an injection of dark matter and without it.
"The very inner Galaxy is exactly where the dark matter density is high enough for dark matter annihilation to substantially replaceas the stellar energy source, allowing stars to stay forever young despite their advanced age," Isabelle John, an astrophysics graduate student at Stockholm University, and colleaguesThis youthfulness indicates they formed locally and didn't drift in from elsewhere.
Incorporating dark matter's influence in their stellar evolution models, John and colleagues predict a new class of stars may exist near the galactic center with"striking differences" that place them outside the realm of so-calledJohn and colleagues' simulations suggest a new branch of stars might need to be added to that plot: higher-mass stars that accrete dark matter from a virtually endless reserve and burn at cooler temperatures for the same brightness as main sequence...
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