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    galactic bar tagged posts

    Feeding a Galaxy’s Nuclear Black Hole

    November 8, 2020, Categories  Astronomy/Space

    A near-infrared Hubble image of the luminous, barred spiral galaxy ESO320-G030. Infrared observations and modeling of over a dozen molecular species at its center reveal massive inflows of gas to a nuclear region undergoing a burst of star formation and dominated by three-components, a small warm core, a disk, and an outer envelope.
    NASA/HST; Alonso-Herrero et al.

    A galactic bar is the approximately linear structure of stars and gas that stretches across the inner regions of some galaxies. The bar stretches from one inner spiral arm, across the nuclear region, to an arm on the other side...

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    Galactic Bar Paradox Resolved in Cosmic Dance

    August 27, 2020, Categories  Astronomy/Space

    Snapshots from a Milky Way galaxy simulation. The bar in the centre and the spiral arms are thought to rotate at different speeds. If they are disconnected the bar shows its true and smaller structure (left). Every time they meet, the bar appears longer and its rotation slower (right).
    Credit T. Hilmi / University of Surrey
    Licence type Attribution (CC BY 4.0)

    New light has been shed on a mysterious and long-standing conundrum at the very heart of our galaxy. The new work offers a potential solution to the so-called ‘Galactic bar paradox’, whereby different observations produce contradictory estimates of the motion of the central regions of the Milky Way. The results are published in Monthly Notices of the Royal Astronomical Society.

    The majority of spiral galaxies, like our home the ...

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