News tagged with optical emission
An Intriguing, Glowing Galaxy
May 14, 2009 |
4.1 / 5 (10) |
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A supermassive black hole may be responsible for the glowing appearance of galaxy 3C 305, located about 600 million light years away in the constellation Draco. Composite data from NASA’s Chandra X-ray Observatory ...
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The Energy Sources of Ultraluminous Galaxies
Nov 27, 2009 |
4.6 / 5 (19) |
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(PhysOrg.com) -- Ultraluminous infrared galaxies ((ULIRGs) are galaxies whose luminosity exceeds that of a trillion suns; for comparison, the Milky Way galaxy has a typical (and much more modest) luminosity ...
A Galaxy Collision in Action
Jul 09, 2009 |
4.7 / 5 (10) |
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This beautiful image gives a new look at Stephan's Quintet, a compact group of galaxies discovered about 130 years ago and located about 280 million light years from Earth. The curved, light blue ridge running ...
X-Ray Jets from Galaxies
Oct 19, 2009 |
4.5 / 5 (4) |
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(PhysOrg.com) -- Some dramatic galaxies eject gigantic, collimated jets of ionized gas millions of light-years long, powered by the massive black holes at their centers. The ionized jets are detected at radio ...
Green light from Silicon
Apr 15, 2009 |
4.2 / 5 (15) |
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(PhysOrg.com) -- Researchers at the University of St Andrews have made a surprise discovery that the material at the heart of the microelectronics industry can emit green light.
Scientists create new type of nanocrystal
Nanotechnology / Nanomaterials
May 24, 2007 |
3.8 / 5 (19) |
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U.S. government scientists have created a new type of nanocrystal that can be used as a laser material.
Quantum dot lasers -- 1 dot makes all the difference
Apr 12, 2007 |
3.8 / 5 (26) |
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Physicists at the National Institute of Standards and Technology and Stanford and Northwestern Universities have built micrometer-sized solid-state lasers in which a single quantum dot can play a dominant ...
Tiny lasers get a notch up
Jan 22, 2009 |
4 / 5 (5) |
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Tiny disk-shaped lasers as small as a speck of dust could one day beam information through optical computers. Unfortunately, a perfect disk will spray light out, not as a beam, but in all directions. New theoretical results, ...
Study on free-space optical communication shows experimental evidence of a unique atmospheric effect
Mar 17, 2009 |
4 / 5 (6) |
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Three members of the faculty at Stevens Institute of Technology recently collaborated on a paper focusing on free-space optical communication, which appears in the latest issue of Optics Express.
Black Hole Pumps Iron
Sep 14, 2009 |
4.3 / 5 (15) |
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(PhysOrg.com) -- This composite image of the Hydra A galaxy cluster shows 10-million- degree gas observed by Chandra in blue and jets of radio emission observed by the Very Large Array in pink. Optical data ...
New View of Doomed Star
Jun 20, 2007 |
4.5 / 5 (86) |
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Eta Carinae is a mysterious, extremely bright and unstable star located a mere stone's throw - astronomically speaking - from Earth at a distance of only about 7500 light years. The star is thought to be ...
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