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    dark matter tagged posts

    New Theory may explain why Dark Matter has Evaded Direct Detection in Earth-based experiments

    September 25, 2015, Categories  Astronomy/Space, Physics

    This 3D map illustrates the large-scale distribution of dark matter, reconstructed from measurements of weak gravitational lensing by using the Hubble Space Telescope. Credit: Image courtesy of DOE/Lawrence Livermore National Laboratory

    This 3D map illustrates the large-scale distribution of dark matter, reconstructed from measurements of weak gravitational lensing by using the Hubble Space Telescope. Credit: Image courtesy of DOE/Lawrence Livermore National Laboratory

    Lattice Strong Dynamics Collaboration, led by a Lawrence Livermore National Lab team, has combined theoretical and computational physics techniques and used the Laboratory’s massively parallel 2-petaflop Vulcan supercomputer to devise a new model of dark matter. It identifies it as naturally “stealthy” today, but would have been easy to see via interactions with ordinary matter in the extremely high-temperature plasma conditions that pervaded the early universe.

    Dark matter makes up 83% of all matter in the universe and does not interact directly with elect...

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    Dark Matter Hiding in Stars may Cause Observable Oscillations

    September 20, 2015, Categories  Astronomy/Space

    dark matter stars

    This sequence shows snapshots of a star’s density when two dark matter cores collide, where the x-axis is the plane of collision (only half the space is shown, but the remaining space can be obtained by symmetry). Although the final configuration is more compact and massive than the original, the star does not collapse into a black hole because it ejects some of its mass, slowing down its growth so that it remains stable. Credit: Brito, et al. ©2015 American Physical Society Read more at: http://phys.org/news/2015-09-dark-stars-oscillations.html#jCp

    Large amounts of hidden mass inside stars might be composed of extremely lightweight hypothetical particles called axions, which are a primary dark matter candidate...

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    Detection of Gamma Rays from a newly discovered Dwarf Galaxy may point to Dark Matter

    August 20, 2015, Categories  Astronomy/Space

    A newly discovered dwarf galaxy orbiting our own Milky Way has offered up a surprise -- it appears to be radiating gamma rays, according to an analysis by physicists at Carnegie Mellon, Brown, and Cambridge universities. The exact source of this high-energy light is uncertain at this point, but it just might be a signal of dark matter lurking at the galaxy's center. Credit: NASA/DOE/Fermi-LAT Collaboration/Geringer-Sameth & Walker/Carnegie Mellon University/Koushiappas/Brown University

    A newly discovered dwarf galaxy orbiting our own Milky Way has offered up a surprise — it appears to be radiating gamma rays, according to an analysis by physicists at Carnegie Mellon, Brown, and Cambridge universities. The exact source of this high-energy light is uncertain at this point, but it just might be a signal of dark matter lurking at the galaxy’s center. Credit: NASA/DOE/Fermi-LAT Collaboration/Geringer-Sameth & Walker/Carnegie Mellon University/Koushiappas/Brown University

    A newly discovered dwarf galaxy orbiting our own Milky Way has offered up a surprise – it appears to be radiating gamma rays, according to an analysis by physicists...

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