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Large Group of Stellar-Mass Black Holes in NGC 6397 5nvklj





Large Group of Stellar-Mass Black Holes in NGC 6397 9tpt39

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    Large Group of Stellar-Mass Black Holes in NGC 6397

    Dragon
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    • Post n°1

    Large Group of Stellar-Mass Black Holes in NGC 6397 Empty Large Group of Stellar-Mass Black Holes in NGC 6397

    Post by Dragon Tue Feb 16, 2021 3:22 pm

    Astronomers using the NASA/ESA Hubble Space Telescope have found evidence for dozens of stellar-mass black holes lurking in the core-collapsed, globular cluster NGC 6397, one of the closest globular clusters to Earth.

    NGC 6397 is located 7,800 light-years away in the southern constellation of Ara. Because of its very dense nucleus, it is known as a core-collapsed cluster.

    Also known as GCl 74, the cluster is 13.4 billion years old and so formed not long after the Big Bang.

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    Large Group of Stellar-Mass Black Holes in NGC 6397 334pu7m
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    Dragon
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    Large Group of Stellar-Mass Black Holes in NGC 6397 Empty Re: Large Group of Stellar-Mass Black Holes in NGC 6397

    Post by Dragon Tue Feb 16, 2021 3:24 pm

    Large Group of Stellar-Mass Black Holes in NGC 6397 Image_9347-NGC-6397
    Image credit: NASA / ESA / Hubble / N. Bartmann.

    An artist’s impression of a group of stellar-mass black holes in the center of NGC 6397.

    Source / Image Courtesy


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    • Post n°3

    Large Group of Stellar-Mass Black Holes in NGC 6397 Empty Re: Large Group of Stellar-Mass Black Holes in NGC 6397

    Post by Dragon Tue Feb 16, 2021 3:25 pm



    Astronomers on the hunt for an intermediate-mass black hole at the heart of the globular cluster NGC 6397, found something they weren’t expecting: a concentration of smaller black holes lurking there instead of one massive black hole.


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    Large Group of Stellar-Mass Black Holes in NGC 6397 Empty Re: Large Group of Stellar-Mass Black Holes in NGC 6397

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