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| Aquarius Stream, blazars, and zig-zag jets | Jan 28, 2014 11:26 PM PST | url |
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Added 1 new A* page:Continuing to go though my stockpile of old space news links:
Feb 17, 2010: Astronomers dig up cannibalised galaxy (abc.net.au) - Scientists identify the "Aquarius Stream": a ribbon of stars in our galaxy moving separately from the rest, revealing them to be the remnant of a dwarf galaxy swallowed by the Milky Way some 700 million years ago
Apr 14, 2012: A Universe of Blazars --"Supermassive Black Hole Jets Pointed at Earth" (dailygalaxy.com) - The headline pretty much tells you what a "blazar" is; as of the writing of this article, NASA's WISE ("Wide-field Infrared Survey Explorer") satellite had identified over 200 of them by spotting the "specific infrared signature when particles in their jets are accelerated to almost the speed of light"
Dec 3, 2013: Massive Black Hole Duo: Possible Sighting by NASA's WISE (jpl.nasa.gov) - Okay so I just stumbled across this one from the previous article; it talks about the discovery of an anomalous signal from the center of an active galaxy: instead of emitting a straight, steady jet from its center, as most supermassive black holes at the centers of active galaxies do, WISE analysts were reading a jet coming out in a zig-zag pattern; the most likely explanation seems to be that this is the result of the end stage of a galactic merger, where two supermassive black holes from colliding galaxies are spiraling together, and the gravitational pull or jet from one is disrupting the jet of the other
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