Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
A newly discovered rogue stellar body may well be a"failed star," but it certainly isn't a failure when it comes to velocity! galaxy at 1.2 million mph . That's about 1,500 times faster than the speed of sound! Thankfully, this cosmic runaway is heading toward the center of the Milky Way and not toward us. However, the object is traveling so fast that it could eventually escape our galaxy entirely.
"This discovery mainly opens up a new pathway to studying brown dwarfs that are in remote regions of the Milky Way, including its center,and its various globular clusters and satellites," Burgasser said."All of these systems are too far away to study brown dwarfs in detail directly, but if they get thrown at us, it's much easier!", that develop overly dense patches that collapse under the influence of their own gravity.
"The orbit is certainly the most surprising aspect of this object; it is moving radially in and out of the center of the Milky Way and almost perfectly in the plane," Burgasser said."Most of the high-velocity stars we see are on much more chaotic or inclined orbits. I think this is a real clue to its real origin.")
"That speculation is informed partly by the fact that the majority of stars in the Milky Way are low mass, and about one in five are brown dwarfs, and that these objects are the easiest to 'throw around' since they are so low mass."The team now intends to follow up on the investigation of CWISE J1249+3621's atmosphere in greater detail to see if its chemical abundances reveal something about its origin.
France Dernières Nouvelles, France Actualités
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