USA: High-voltage auroras on Jupiter

11.03.2005

11.03.2005


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About auroras on Jupiter has been known for a long time. This is the most spectacular and active auroras in the solar system. Recently conducted their research using X-ray space telescope Chandra, and the results were very interesting. Chandra telescope detected in the atmosphere above the poles of Jupiter, the presence of ions of oxygen and other elements, in which the atoms are stripped of almost all their electrons. The presence in the atmosphere of these highly ionized atoms, which are accelerated in a strong magnetic field of Jupiter to very high speeds, indicates that by its nature auroras on Jupiter different from auroras observed on Earth or Saturn.

On Earth, auroras occur when charged particles ejected from the surface of the sun fall into the Earth's magnetic field and are deflected by this field in the polar regions of the upper atmosphere. In these polar regions under the impact of charged particles are illuminated atmospheric gases, and it is called the aurora.

Jupiter's aurora generation technology is another. Here is the "own" a powerful source of charged particles — the volcanic eruption on Io, one of Jupiter's moons. This charged particles getting into the powerful magnetic field of Jupiter, accelerated in its polar regions to very high velocities encountered in the molecules of atmospheric gases and cause them to glow. That is, between the Jovian aurora and solar activity is no connection, and the auroras on Jupiter is almost always very active.

Furthermore, if the particles are responsible for the emission aurora would flew Sun, in their composition would be both electrons and protons, and under the action of protons present in aurora have strong ultraviolet radiation. However, UV radiation from Jupiter's aurora is rather weak. Powerful X-rays auroras also points out that in the atmosphere of Jupiter voltage electric fields reach about 10 million volts, and the magnitude of the currents flowing there reaches 10 million amperes. Such stresses also explain the powerful radio emission of electrons in the atmosphere of Jupiter, which was first recorded by the research probe Ulysses (this probe is working on a polar orbit of the sun, and its radius is approximately equal to the radius of the orbit of Jupiter).

Battery News, 09.03.2005 7:46
Source: ROL

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