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Chandra Spies Cosmic Fireworks
Cambridge MA (SPX) Jul 14, 2006 The Chandra X-ray Observatory has captured the remains of four supernovas in the nearby Large Magellanic Cloud, showing multi-million-degree gas that has been heated by shock waves from the explosions. Moving in a clockwise direction from the upper left to lower left, the approximate ages of the remnants are 600 years, 1,500 years, 10,000 years and 13,000 years, respectively. Chandra's X-ray spectrometer also provided important clues about how these stars exploded. The remnants on the upper left, upper right and lower right show a concentration of elements typical supernova. Such an explosion is triggered when matter is pulled from a companion star onto a white dwarf star and pushes it past the limit of stability. The ensuing thermonuclear explosion completely disrupts the white dwarf star. In contrast, the supernova that produced the remnant SNR 0453-68.5 left behind a neutron star. This indicates that a Type II supernova occurred when the nuclear power source of a massive star became exhausted and the stellar core collapsed to form a neutron star, while the outer layers of the star were blown away. The rapidly spinning neutron star is ejecting a magnetized wind of extremely high-energy particles, which appears in the image as the elongated, bright blue-white spot at the center of the remnant. Related Links Chandra at Harvard
Supernova Leaves Behind Mysterious Object
Paris, France (SPX) Jul 14, 2006ESA's XMM-Newton satellite has produced data allowing scientists to examine closely an object discovered more than 25 years ago and find it is like none other known in the Milky Way galaxy. |
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