November 17, 2014 <\/p>\n
Provided by Janet Anderson, NASA Marshall Space Flight Center and Megan Watzke, Chandra X-ray Center <\/p>\n
The giant black hole at the center of the Milky Way may be producing mysterious particles called neutrinos. If confirmed, this would be the first time that scientists have traced neutrinos back to a black hole. <\/p>\n
The evidence for this came from three NASA satellites that observe in X-ray light: the Chandra X-ray Observatory, the Swift gamma-ray mission, and the Nuclear Spectroscopic Telescope Array (NuSTAR). <\/p>\n
Neutrinos are tiny particles that carry no charge and interact very weakly with electrons and protons. Unlike light or charged particles, neutrinos can emerge from deep within their cosmic sources and travel across the universe without being absorbed by intervening matter or, in the case of charged particles, deflected by magnetic fields. <\/p>\n
The Earth is constantly bombarded with neutrinos from the sun. However, neutrinos from beyond the solar system can be millions or billions of times more energetic. Scientists have long been searching for the origin of ultra-high energy and very high-energy neutrinos. <\/p>\n
Figuring out where high-energy neutrinos come from is one of the biggest problems in astrophysics today, said Yang Bai of the University of Wisconsin in Madison, who co-authored a study about these results published in Physical Review D. We now have the first evidence that an astronomical source the Milky Ways supermassive black hole may be producing these very energetic neutrinos. <\/p>\n
Because neutrinos pass through material very easily, it is extremely difficult to build detectors that reveal exactly where the neutrino came from. The IceCube Neutrino Observatory, located under the South Pole, has detected 36 high-energy neutrinos since the facility became operational in 2010. <\/p>\n
By pairing IceCubes capabilities with the data from the three X-ray telescopes, scientists were able to look for violent events in space that corresponded with the arrival of a high-energy neutrino here on Earth. <\/p>\n
We checked to see what happened after Chandra witnessed the biggest outburst ever detected from Sagittarius A*, the Milky Ways supermassive black hole, said co-author Andrea Peterson, also of the University of Wisconsin. And less than three hours later, there was a neutrino detection at IceCube. <\/p>\n
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Milky Way's Supermassive Black Hole May Be a Neutrino Factory<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" November 17, 2014 Provided by Janet Anderson, NASA Marshall Space Flight Center and Megan Watzke, Chandra X-ray Center The giant black hole at the center of the Milky Way may be producing mysterious particles called neutrinos. If confirmed, this would be the first time that scientists have traced neutrinos back to a black hole Continue reading