File:NASA - Fermi Detects First Gamma-ray Pulsar in Another Galaxy 9yKJBBvgf7U.webm
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editDescriptionNASA - Fermi Detects First Gamma-ray Pulsar in Another Galaxy 9yKJBBvgf7U.webm |
English: Researchers using NASA's Fermi Gamma-ray Space Telescope have discovered the first gamma-ray pulsar in a galaxy other than our own. The object sets a new record for the most luminous gamma-ray pulsar known.
The pulsar lies in the outskirts of the Tarantula Nebula in the Large Magellanic Cloud, a small galaxy that orbits our Milky Way and is located 163,000 light-years away. The Tarantula Nebula is the largest, most active and most complex star-formation region in our galactic neighborhood. It was identified as a bright source of gamma rays, the highest-energy form of light, early in the Fermi mission. Astronomers initially attributed this glow to collisions of subatomic particles accelerated in the shock waves produced by supernova . However, the discovery of gamma-ray pulses from a previously known pulsar named PSR J0540-6919 shows that it is responsible for roughly half of the gamma-ray brightness previously thought to come from the nebula. Gamma-ray pulses from J0540-6919 have 20 times the intensity of the previous record-holder, the pulsar in the famous Crab Nebula. Yet they have roughly similar levels of radio, optical and X-ray emission. Accounting for these differences will guide astronomers to a better understanding of the extreme physics at work in young pulsars. Read more at http://www.nasa.gov/feature/goddard/nasas-fermi-satellite-detects-first-gamma-ray-pulsar-in-another-galaxy This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=12003 Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Or find NASA Goddard Space Flight Center on Facebook: http://www.facebook.com/NASA.GSFC Or find us on Twitter: https://twitter.com/NASAGoddard |
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Source | YouTube: NASA - Fermi Detects First Gamma-ray Pulsar in Another Galaxy – View/save archived versions on archive.org and archive.today |
Author | NASA Goddard |
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current | 21:58, 19 November 2020 | 3 min 6 s, 1,920 × 1,080 (39.6 MB) | Eatcha (talk | contribs) | Uploaded NASA | Fermi Detects First Gamma-ray Pulsar in Another Galaxy by NASA Goddard from Youtube |
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