A & # 39; thick bullet & # 39; dark matter a million times larger than the sun may have been plowed through the Milky Way, dragging the stars in the line behind it, in an astrophysical model explaining a mysterious & # 39; glitch & # 39; in space.
The theory of " galactic hit-and-run " explains the findings of the GD-1, the longest stellar stream in the universe, according to Ana Bonaca, a fellow at the Harvard-Smithsonian Center for Astrophysics, who showed his theory at the American Physical Society last month. Instead of a single smooth edge space is expected to find at the source point of the stellar stream, the GD-1 has a second slot, with " to propel " of suspended stars, as if they were dragged by gravity behind some big " dark impactor " barreling through the universe.
of dark thing? " We did not map [the impactor] to any apparent thing we observed ," explains Bonaca, and " it is bigger than a star … a million times the mass of day ["Unrecognized-" it may be a luminous thing to leave somewhere, and it is hiding somewhere in the universe "- but hard to hide something from 30 to 65 light-years across.
If there is no visible culprit in which to pin the celestial fender-bender, then, and there are no signs of a black hole such as a great believer in the midst of the Milky Way, Bonaca believes that a large " clump "a dark matter can be responsible for tears in GD-1. Despite the inability of the researchers to " prove " having dark matter, most agree with it and it is very luminous in bright objects, holding galaxies and -cluster in their centers.
the unique space by studying a galactic map from the Gaia mission, the most complete rendering of the Milky Way, and cross-referencing it with observation through the multi-mirror telescope capable of recognizing the direction in which the stars move. This method creates the most accurate image of GD-1 yet, and he hopes to map more than the Milky Way in hopes of turning up other areas where similar dark that behemoths may have been through – eventually mapping the location of the dark matter " clumps " across the galaxy.
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