Juno station instruments studying the Jupiter system detect a close signal at a frequency of 6.5 MHz, which is in the high frequency radio wave range. Naked science notes that on Earth they are used for ionospheric communication and radar above the horizon, but in the Jupiter system they have a natural origin.
Such signals have been known for a long time and are known as decimal radio explosions. But for the first time they were able to be mounted directly near the place of birth. Juno flew through a radio explosion source near Ganmid.
The device’s sensors monitored the phenomenon for about five seconds and then integrated it with the background radiation. Juno travels at a speed of 50 kilometers per second, so it can be concluded that the area of the space where the signal is generated is about 250 kilometers.
NASA Representative Patrick Wiggins commented on KTVX, drawing public attention to the opening. According to him, the signal has a natural origin. The result of such radio explosions is cyclotronometer instability (CMI). The essence of this effect is the amplification of radio waves by free electrons. This happens if the oscillation frequency of the electrons in the plasma is significantly lower than their cyclotron frequency. There is even a random signal that successfully appears in a cloud of charged particles.
Radio explosions are formed in those parts of Jupiter’s magnetic field that interact closely with Ganmid’s magnetic field. Electrons trapped by magnetic lines cannot generate radio waves alone. Another effect that Juno can observe is the X-ray aurora in Jupiter’s lunar atmosphere.
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