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    accretion disc tagged posts

    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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    Scientists observe Supermassive Black Hole feeding on Cold Gas

    June 9, 2016, Categories  Astronomy/Space

    Deep in the heart of the Abell 2597 Brightest Cluster Galaxy, astronomers see a small cluster of giant gas clouds raining in on the central black hole, as illustrated in this artist concept image. Credit: NRAO/AUI/NSF; D. Berry/SkyWorks; ALMA (ESO/NAOJ/NRAO)

    Deep in the heart of the Abell 2597 Brightest Cluster Galaxy, astronomers see a small cluster of giant gas clouds raining in on the central black hole, as illustrated in this artist concept image. Credit: NRAO/AUI/NSF; D. Berry/SkyWorks; ALMA (ESO/NAOJ/NRAO)

    Findings suggest 2 dining styles for black holes. For the first time, astronomers have detected billowy clouds of cold, clumpy gas streaming toward a black hole, at the center of a massive galaxy cluster. The clouds are traveling at up to 355km/s and may be only 150 light years away from its edge, almost certain to fall into the black hole. The observations represent the first direct evidence to support the hypothesis that black holes feed on clouds of cold gas...

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    Intense Wind found in the neighborhood of a Black Hole

    May 10, 2016, Categories  Astronomy/Space

    an artistic view of the accretion disc surrounding the black hole V404 Cygni, where the intense wind detected by GTC becomes evident. Credit: Gabriel Pérez, SMM (IAC)

    an artistic view of the accretion disc surrounding the black hole V404 Cygni, where the intense wind detected by GTC becomes evident. Credit: Gabriel Pérez, SMM (IAC)

    An international team of astrophysicists have detected an intense wind from one of the closest known black holes to the Earth. During observations of V404 Cygni, which went into a bright and violent outburst in June 2015 after more than 25 years of quiescence, the team began taking optical measurements of the black hole’s accretion disc using the 10.4m Gran Telescopio CANARIAS (GTC) – the biggest optical-infrared telescope in the world in the Roque de los Muchachos Observatory (Garafía, La Palma) in the Canary Islands.

    The results show a wind of neutral material (unionised H and He), formed in the outer layers of the accret...

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