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    dark matter tagged posts

    Bump on a Plot from Chandra X-ray observatory reveals excess of X-rays, hinting at Dark Matter

    February 5, 2017, Categories  Astronomy/Space

    A massive cluster of yellowish galaxies, seemingly caught in a red and blue spider web of eerily distorted background galaxies, makes for a spellbinding picture from the new Advanced Camera for Surveys aboard NASA's Hubble Space Telescope. To make this unprecedented image of the cosmos, Hubble peered straight through the center of one of the most massive galaxy clusters known, called Abell 1689. The gravity of the cluster's trillion stars — plus dark matter — acts as a 2-million-light-year-wide lens in space. This gravitational lens bends and magnifies the light of the galaxies located far behind it. Some of the faintest objects in the picture are probably over 13 billion light-years away (redshift value 6). Strong gravitational lensing as observed by the Hubble Space Telescope in Abell 1689 indicates the presence of dark matter. Credit: NASA, N. Benitez (JHU), T. Broadhurst (Racah Institute of Physics/The Hebrew University), H. Ford (JHU), M. Clampin (STScI),G. Hartig (STScI), G. Illingworth (UCO/Lick Observatory), the ACS Science Team and ESA Read more at: https://phys.org/news/2017-02-plot-chandra-x-ray-observatory-reveals.html#jCp

    A massive cluster of yellowish galaxies, seemingly caught in a red and blue spider web of eerily distorted background galaxies, makes for a spellbinding picture from the new Advanced Camera for Surveys aboard NASA’s Hubble Space Telescope. To make this unprecedented image of the cosmos, Hubble peered straight through the center of one of the most massive galaxy clusters known, called Abell 1689. The gravity of the cluster’s trillion stars — plus dark matter — acts as a 2-million-light-year-wide lens in space. This gravitational lens bends and magnifies the light of the galaxies located far behind it. Some of the faintest objects in the picture are probably over 13 billion light-years away (redshift value 6)...

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    Can the Donut-Shaped Magnet ‘CAPPuccino submarine’ hunt for Dark Matter?

    January 24, 2017, Categories  Astronomy/Space, Physics

    Scientists at IBS CAPP are prototyping haloscopes - machines that hunt for dark matter. Haloscope have very strong magnets. Helix-shaped magnets (solenoid magnets, on the left) are commonly used in dark matter experiments. CAPP scientists are also investigating the possibility of using donut-shaped magnets, technically known as toroidal magnets, and nicknamed this device "CAPPuccino submarine". Credit: Image courtesy of Institute for Basic Science

    Scientists at IBS CAPP are prototyping haloscopes – machines that hunt for dark matter. Haloscope have very strong magnets. Helix-shaped magnets (solenoid magnets, on the left) are commonly used in dark matter experiments. CAPP scientists are also investigating the possibility of using donut-shaped magnets, technically known as toroidal magnets, and nicknamed this device “CAPPuccino submarine”. Credit: Image courtesy of Institute for Basic Science

    IBS scientists clarify that toroidal magnets can also look for axions, one of the particle candidates for the mysterious dark matter...

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    Galaxy Murder Mystery

    January 18, 2017, Categories  Astronomy/Space

    This artist's impression shows the spiral galaxy NGC 4921 based on observations made by the Hubble Space Telescope. Credit: ICRAR, NASA, ESA, the Hubble Heritage Team. STScI/AURA

    This artist’s impression shows the spiral galaxy NGC 4921 based on observations made by the Hubble Space Telescope. Credit: ICRAR, NASA, ESA, the Hubble Heritage Team. STScI/AURA

    It’s the big astrophysical whodunnit. Across the Universe, galaxies are being killed and the question scientists want answered is, what’s killing them? New research published today by a global team of researchers, based at the International Centre for Radio Astronomy Research (ICRAR), seeks to answer that question. The study reveals that ram-pressure stripping is more prevalent than previously thought, driving gas from galaxies and sending them to an early death by depriving them of the material to make new stars.

    The study of 11,000 galaxies shows their gas – the lifeblood for star formation – is being violently ...

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    NA64 hunts the mysterious Dark Photon

    November 26, 2016, Categories  Astronomy/Space

    NA64 hunts the mysterious dark photon

    An overview of the NA64 experimental set-up at CERN. NA64 hunts down dark photons, hypothetic dark matter particles. Credit: Maximilien Brice/CERN

    One of the biggest puzzles in physics is that 85% of the matter in our universe is “dark”: it does not interact with the photons of the conventional electromagnetic force and is therefore invisible to our eyes and telescopes. Although the composition and origin of dark matter are a mystery, we know it exists because astronomers observe its gravitational pull on ordinary visible matter such as stars and galaxies.

    Some theories suggest that, in addition to gravity, dark matter particles could interact with visible matter through a new force, which has so far escaped detection...

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