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A "dense ball" of dark matter a thousand times larger than the sun could have crossed the Milky Way, dragging the stars behind it, in an astrophysical model that explains a mysterious "glitch" in the galaxy.
The "galactic delirium"The theory explains the gap found in GD-1, the longest stellar brook in the galaxy," said Ana Bonaca, researcher at the Harvard-Smithsonian Center for Astrophysics, who presented her theory at the American Physical Society last month. Instead of the only smooth interval that we hope to find at the point of origin of the star flow, GD-1 has a second gap, with a "spur"Hanging stars, as if they were being dragged by gravity behind a huge"black impactor"Barrel through the universe.
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Why a gigantic stain of dark matter? "We can not map [the impactor] to any bright object that we have observed, Explains Bonaca, andit's much more massive than a star … a million times the mass of the sun. "That does not exclude the possibility -"it may be a luminous object that has gone somewhere and is hiding somewhere in the galaxy"- but it would be difficult to hide something like 30 to 65 light-years away.
In the absence of visible culprit on which to pin the heavenly mudguard, and in the absence of any tell-tale sign of a black hole similar to that which is supposed to be at the center of the Milky Way , Bonaca believes that a "tuft"Dark matter could be responsible for tearing in GD-1. Despite the frustrating incapacity of researchersprove"The existence of dark matter, most people agree that it is there and that it largely exceeds the luminous matter, maintaining the galaxies together and regrouping in their center.
Bonaca was able to locate the spatial quirk by studying a galactic map of the Gaia mission, the most complete rendering of the Milky Way, and comparing it to an observation through a multiple-mirror telescope capable of distinguishing the direction in which the stars are moving. . This method has created the most accurate image of GD-1 to date, and it hopes to further map the Milky Way in the hope of spotting other areas where similar dark behemoths could have occurred. move – to map the location of these black materials "tufts"In all the galaxy.
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