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Two Supermassive Black Holes in the Same Galaxy

Two Supermassive Black Holes in the Same Galaxy. Profile of the Galaxy – NGC 6240. - Discovered by NASA’s Chandra X-ray Observatory. - Nucleus of the galaxy is extraordinarily bright. - 400 millions Light Year from Earth. - Example of massive galaxy.

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Two Supermassive Black Holes in the Same Galaxy

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  1. Two Supermassive Black Holes in the Same Galaxy

  2. Profile of the Galaxy – NGC 6240 - Discovered by NASA’s Chandra X-ray Observatory - Nucleus of the galaxy is extraordinarily bright - 400 millions Light Year from Earth - Example of massive galaxy • Two black holes in the central region of the galaxy • they are 3000 Light Year apart • They are orbiting each other • Actively accreting material from their surroundings

  3. Formation of the Galaxy (Movies of merging of two galaxies) - Recent collisions - Consequences of merging of two smaller galaxies • Optical • Arcs are result of collision of two galaxies in the past X-ray - Detect two supermassive black holes

  4. Observations - Chandra can distinguish two nucleus by measuring details of X-radiation from each nucleus - Optical: central part is not visible in optical wavelength band (due to large amount of dust and gas in such galaxy) - X-ray: better because it is more penetrating to view the centre • High energy X-ray emission (blue) 2. Low energy X-ray emission (red)

  5. Predictions - The two black holes will merge several hundred years later (this will be the first time we see binary black hole in action) • Create even larger black hole • Release intense radiation and gravitational waves • gravitational waves spread through the universe (movies of merging of two black holes) • LISA (Laser Interferometer Space Antenna) planned by NASA and ESA, will search this waves

  6. Importance The observation of two black holes in the same galaxies: - shows black hole can grow enormous masses in the centre of galaxies by merging with other black hole - understand how galaxies form and evolve

  7. Source Website: http://www.mpe.mpg.de/pr20021119.html#movies Date: 17/12/02

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