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PR News Wire (Free subscription) | yesterday
GREENBELT, Md., Nov. 10 /PRNewswire-USNewswire/ -- While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers at NASA's Goddard Space Flight Center in Greenbelt, Md., find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole...
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Astronomy Cmarchesin (Free subscription) | yesterday
... light-years away in the constellation Centaurus. Using the European Space Agency's orbiting XMM-Newton observatory, Strohmayer and Mushotzky studied the source -- known as NGC 5408 X-1 -- in 2006 and 2008. XMM-Newton detected what the astronomers call "quasi-periodic oscillations," a nearly regular "flickering" caused by the pile-up of hot gas deep within the accretion disk...
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Physorg (Free subscription) | yesterday
(PhysOrg.com) -- While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers at NASA's Goddard Space Flight Center in Greenbelt, Md., find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole to date.
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Spacefellowship (Free subscription) | yesterday
While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers at NASA’s Goddard Space Flight Center in Greenbelt, Md., find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight [...]
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Science Daily (Free subscription) | 11/10/2009
While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole to date.
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Eurekalert (Free subscription) | 11/10/2009
( NASA/Goddard Space Flight Center ) While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers at NASA's Goddard Space Flight Center in Greenbelt, Md., find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole to date.
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Space.com (Free subscription) | yesterday
... galaxy. But finding remains a challenge."The new study used the European Space Agency's orbiting XMM-Newton observatory to observe the candidate, called NGC 5408 X-1, in 2006 and then again in 2008. It found further proof that the signal is a medium-sized black hole.Black holes are objects that trap matter and even light with their gravity. Though astronomers can't see them directly, they detect...
