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Stellar magnetic fields directly imaged for the first time
Star Keeps Magnetic Lock on Its Big Brother -- Berardelli 2010 (114): 3
-- ScienceNOW "In today's issue of Nature, a team of astronomers reports a breakthrough. They collected images of the magnetic field generated by one of the stars in the Algol system, located about 93 light-years away. The two stars in the system--one about three times more massive than the sun and the other a little less massive--are so close to each other that one orbit takes only 3 days. The smaller star is the source of the magnetic field, and even though that field is about 1000 times stronger than the sun's, imaging it still required two arrays of radiotelescopes, plus two extra dishes, to detect the signals generated by magnetic fields. One array stretches from Hawaii to the Virgin Islands, whereas the other occupies an expanse of the New Mexico desert, and the individual dishes sit in West Virginia and Germany. " http://sciencenow.sciencemag.org/cgi...ull/2010/114/3 |
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Stellar magnetic fields directly imaged for the first time
On Jan 16, 4:55*pm, Yousuf Khan wrote:
Star Keeps Magnetic Lock on Its Big Brother -- Berardelli 2010 (114): 3 -- ScienceNOW "In today's issue of Nature, a team of astronomers reports a breakthrough. They collected images of the magnetic field generated by one of the stars in the Algol system, located about 93 light-years away. The two stars in the system--one about three times more massive than the sun and the other a little less massive--are so close to each other that one orbit takes only 3 days. The smaller star is the source of the magnetic field, and even though that field is about 1000 times stronger than the sun's, imaging it still required two arrays of radiotelescopes, plus two extra dishes, to detect the signals generated by magnetic fields. One array stretches from Hawaii to the Virgin Islands, whereas the other occupies an expanse of the New Mexico desert, and the individual dishes sit in West Virginia and Germany. "http://sciencenow.sciencemag.org/cgi/content/full/2010/114/3 Unlike our Sun which bursts up sometimes, the mentioned star has a constant sun burst, an ongoing electromagnetic discharge. The large sun caused the small sun orbiting it to become electric, which is a process of constant friction, a chaos of internal tides, wrong direction of orbit, etc. |
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Stellar magnetic fields directly imaged for the first time
gb wrote:
Unlike our Sun which bursts up sometimes, the mentioned star has a constant sun burst, an ongoing electromagnetic discharge. The large sun caused the small sun orbiting it to become electric, which is a process of constant friction, a chaos of internal tides, wrong direction of orbit, etc. I think it's just easier to maintain a constant magnetic field between two magnetized objects, than within a single magnetized object. The two objects exchanging magnetic information with each other regulate themselves to each other, whereas a single object's magnetic field would go up and down due to internal turbulence conditions. Even in our solar system, the Sun itself might benefit from some level of magnetic regulation by exchanging magnetic fields with its planets like Earth, and especially Jupiter and Saturn. Yousuf Khan |
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