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    colliding galaxies tagged posts

    First-ever photo Proof of Powerful Jet emerging from Colliding Galaxies

    April 9, 2020, Categories  Astronomy/Space

    The Seyfert 1 galaxy, TXS 2116-077, (seen on the right) collides with another spiral-shaped galaxy of similar mass, creating a relativistic jet in the TXS’s center. Both galaxies have active galactic nuclei (AGN).
    Image Credit: Courtesy Vaidehi Paliya

    A team of Clemson University College of Science researchers, in collaboration with international colleagues, has reported the first definitive detection of a relativistic jet emerging from two colliding galaxies — in essence, the first photographic proof that merging galaxies can produce jets of charged particles that travel at nearly the speed of light.

    Furthermore, scientists had previously discovered that these jets could be found in elliptical-shaped galaxies, which can be formed in the merging of two spiral galaxies...

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    MACHOs are dead, WIMPs are a no-show – say hello to SIMPs

    December 5, 2017, Categories  Astronomy/Space

    Conventional WIMP theories predict that dark matter particles rarely interact with one another, and only weakly with normal matter. Hitoshi Murayama of UC Berkeley and Yonit Hochberg of Hebrew University predict that dark matter SIMPs, comprised of a quark and an antiquark, would collide and interact strongly with one another, producing noticeable effects when the dark matter in galaxies collide. Credit: Kavli IPMU graphic

    Conventional WIMP theories predict that dark matter particles rarely interact with one another, and only weakly with normal matter. Hitoshi Murayama of UC Berkeley and Yonit Hochberg of Hebrew University predict that dark matter SIMPs, comprised of a quark and an antiquark, would collide and interact strongly with one another, producing noticeable effects when the dark matter in galaxies collide. Credit: Kavli IPMU graphic

    Colliding galaxies may be evidence in support of new candidate for universe’s elusive dark matter. The nature of dark matter remains elusive, with numerous experimental searches for WIMPs coming up empty-handed and MACHOs all but abandoned...

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    Shocking case of Indigestion in Supermassive Black Hole

    July 4, 2017, Categories  Astronomy/Space

    Left: Image of the Whirlpool galaxy and NGC 5195. Credit: Jon Christensen. Right: False colour image of NGC 5195 created by combining the VLA 20 cm radio image (red), the Chandra X-ray image (green), and the Hubble Space telescope H-alpha image (blue). The image shows the X-ray and H-alpha arcs, as well as the radio outflows from the supermassive black hole at the centre of NGC 5195. Credits: NRAO / AUI / NSF / NASA / CXC / NASA / ESA / STScI / U. Manchester / Rampadarath et al. Right inset: e-MERLIN maps of the nuclear region of NGC 5195 at 1.4 GHz (left) and 5 GHz (right). The images display a partially resolved source with possible parsec-scale outflows. Credit: e-MERLIN / U. Manchester / Rampadarath et al. Click for a larger image

    Left: Image of the Whirlpool galaxy and NGC 5195. Credit: Jon Christensen. Right: False colour image of NGC 5195 created by combining the VLA 20 cm radio image (red), the Chandra X-ray image (green), and the Hubble Space telescope H-alpha image (blue). The image shows the X-ray and H-alpha arcs, as well as the radio outflows from the supermassive black hole at the centre of NGC 5195. Credits: NRAO / AUI / NSF / NASA / CXC / NASA / ESA / STScI / U. Manchester / Rampadarath et al. Right inset: e-MERLIN maps of the nuclear region of NGC 5195 at 1.4 GHz (left) and 5 GHz (right). The images display a partially resolved source with possible parsec-scale outflows. Credit: e-MERLIN / U. Manchester / Rampadarath et al. Click for a larger image

    A multi-wavelength study of a pair of colliding galaxie...

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