January 21 lands were powerful radio emissions from Jupiter

The planet Jupiter is a powerful source of short bursts of radio signals. They come from the polar magnetosphere giant planet when Jupiter sweep past Earth. January 21, when Jupiter and Moon were met in the sky — the radio series of laser beams hit Jupiter Earth. Amateur astronomer Thomas Ashcraft recorded the sounds coming from the speaker of his short-wave radio telescope in New Mexico.

"On Sunday, Jupiter made a few minutes of strong radio waves. When I was out of my observatory, looking at Jupiter, I heard the sound wave on my radio speakers, and realized that my own body, at that very moment, bathed in electromagnetic rays of Jupiter. Which good feeling! "- says Thomas.

In the video shows the convergence of the Moon and Jupiter in 2012, which is under the sound recorded January 21, 2013.

First there was the radio emission of the planet in 1954, and found it quite by accident, when she got a new phased array, then accidentally spotted strange outbursts. Later, they were able to identify with the radiation of the planet. After which the opening forgotten for a while.

Subsequent studies have been sporadic radiation. Jupiter is the most powerful source of radio emission in the solar system (of course, after the Sun) in this range (10-27 MHz, 17-27 MHz, in fact). The flux density of about 10 ^ 10.05 ^ 6 Janské (relative radio is a huge number, such as a powerful radio galaxy Virgo A has a density of 930 Janské (equivalent to 930 * 10 ^ -26 W / Hz * m ^ 2), and yet it is one of the most powerful radio!.

Sporadic bursts are relatively short, their duration is about 0.1-1 seconds. at least can be kept longer — up to 10 seconds. but it is rare (but bursts, lasting 2-5 sec. appear frequently). In general, the maximum density of the burst is in the 18-20 MHz and may be lower, but because of our beloved ionosphere below smoke heavily. These bursts of highly polarized.

Usually circular polarization, the degree of polarization is sometimes reaches 100%. Typical brightness temperature during the bursts can be 10 ^ 14 Kelvin (the temperature of the radio source, it is natural to the physical temperature, this number is not relevant at all radio astronomers tend to try to express everything in terms of temperature).

If we talk about a single burst, it is usually fairly narrow band, usually the width is less than 2 MHz, the truth is sometimes a narrow band — even reaching ~ 600-700 kHz. On hearing these bursts are perceived as such a measured tweets, there are times when the intensity decreases and generally do not hear anything, the opposite happens when they seem to flare up.

These sounds can be taken at regular normal receivers, including the scanning mode without stopping open shumodavom in the range 21-27 MHz, of course armed with a good antenna, Yagi-Uda example with several elements.

Category: Space

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