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Odd little star has magnetic personality
12-05-2007 · EurekAlert!Observations that included the Gemini Observatory show that a very low-mass star has unexpected magnetic activity and a hot spot that could cover one-half of its surface.
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Keywords: odd, little, star, magnetic, personality
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- Astronomers find puzzling dwarf star with complex magnetic fields
12-05-2007 · EurekAlert!
Typically, little M-dwarf stars -- the most common type of star in the galaxy -- are cold, quiet, and dim. Now a team of astronomers led by Edo Berger, a Carnegie-Princeton postdoctoral fellow, found one M-dwarf that doesn't conform. It has an unusually active and complex magnetic field, stronger than our own Sun's, and a huge hot spot that covers half of its surface.
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- New theory explains enhanced superconductivity in nanowires
10-18-2006 · EurekAlert!
Superconducting wires are used in magnetic resonance imaging machines. Eventually, ultra-narrow superconducting wires might be used in power lines designed to carry electrical energy long distances with little loss. Now, researchers at the University of Illinois at Urbana-Champaign not only have discovered an unusual phenomenon in which ultra-narrow wires show enhanced superconductivity when exposed to strong magnetic fields, they also have developed a theory to explain it.
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- Enceladus geysers mask the length of Saturn's day
03-22-2007 · European Space Agency (ESA)
In a David and Goliath story of Saturnian proportions, the little moon Enceladus is weighing down giant Saturn's magnetic field so much that the field is rotating slower than the planet. This phenomenon makes it nearly impossible to measure the length of the Saturn day using techniques that work at the other giant planets.
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- XMM-Newton reveals a magnetic surprise
02-22-2007 · European Space Agency (ESA)
ESA's X-ray observatory XMM-Newton has revealed evidence for a magnetic field in space where astronomers never expected to find one. The magnetic field surrounds a young star called AB Aurigae and provides a possible solution to a twenty-year-old puzzle.
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- Little Enceladus disturbs Saturn's magnetic field
04-21-2007 · Science News Online
Saturn's tiny moon Enceladus is acting as a brake on the giant planet's magnetic field.
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- Odd Couples: Big black holes challenge star theory
10-27-2007 · Science News Online
The discovery of a black hole almost 16 times as massive as the sun, and the possible discovery of an even heavier one, challenge theories of how such black holes form.
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- X-ray satellites catch magnetar in gigantic stellar 'hiccup'
04-04-2007 · European Space Agency (ESA)
Astronomers using data from several X-ray satellites have caught a magnetar – the remnant of a massive star with an incredibly strong magnetic field – in a sort of giant cosmic blench.
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- New type of massive stellar death
12-20-2006 · EurekAlert!
So far we have thought that the signature of the death of a massive star was an energetic explosion called a "supernova." New observations show that this is not always the case. On the contrary, a team led by Danish researchers has now discovered that some massive stars die by collapsing into a black hole returning very little material into the interstellar medium. The new discovery is published in Nature.
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- Cluster and double star uncover more on bright aurorae
09-11-2007 · EurekAlert!
Cluster data has helped provide scientists with a new view of magnetospheric processes, challenging existing theories about magnetic substorms that cause aurorae and perturbations in GPS signals.
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- Do migratory birds 'see' the magnetic field?
09-25-2007 · EurekAlert!
Every year millions of migratory birds fly towards their wintering quarters and come back in next year's spring to breed. Behavioral experiments have shown that the Earth's magnetic field is the main orientation cue on their journeys. Nevertheless, surprisingly little is known about the neuronal substrates underlying these navigational abilities.
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