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    stellar-mass black hole tagged posts

    Polarized X-rays Reveal Shape, Orientation of Extremely Hot Matter around BlackHole

    November 4, 2022, Categories  Astronomy/Space

    CygX-1 black hole
    An artist’s impression of the Cygnus X-1 system, with the black hole appearing in the center and its companion star on the left. New measurements from Cygnus X-1, reported Nov. 3 in the journal Science, represent the first observations of a mass-accreting black hole from the Imaging X-Ray Polarimetry Explorer (IXPE) mission, an international collaboration between NASA and the Italian Space Agency. (Image: John Paice)

    Researchers’ recent observations of a stellar-mass black hole called Cygnus X-1 reveal new details about the configuration of extremely hot matter in the region immediately surrounding the black hole.

    Matter is heated to millions of degrees as it is pulled toward a black hole. This hot matter glows in X-rays...

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    MAXI J1820+070: Black Hole Outburst caught on Video

    May 30, 2020, Categories  Astronomy/Space

    Credits: X-ray: NASA/CXC/Université de Paris/M. Espinasse et al.; Optical/IR:PanSTARRS

    Astronomers have caught a black hole hurling hot material into space at close to the speed of light. This flare-up was captured in a new movie from NASA’s Chandra X-ray Observatory.

    The black hole and its companion star make up a system called MAXI J1820+070, located in our galaxy about 10,000 light years from Earth. The black hole in MAXI J1820+070 has a mass about eight times that of the sun, identifying it as a so-called stellar-mass black hole, formed by the destruction of a massive star. (This is in contrast to supermassive black holes that contain millions or billions of times the sun’s mass.)

    The companion star orbiting the black hole has about half the mass of the sun...

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