NASA’s Voyager 1 probe detects plasma static ‘hum’ in intracellular space


Artist Voyager Impressions 1.

Voyager’s artist impression 1.
Fig: NASA

Voyager 1 is the most distant man-made objectIt has made another significant discovery with interstellar space.

It is stable, stable and long lasting: a low-frequency hum that runs away at about 40 Hz. This Plasma evidence, so hot that electrons have moved away from their atoms, results in an ionized, or charged, gas. By itself, plasma detection is negligible. It is, after all, a vast amount of visible matter in the universe. What is significant, however, is that this plasma was detected: a very local intracellular medium.

Even more significant is NASA Voyager d Managed to detect Weak Plasma vibrations in this remote area of ​​space. Previously, the probe detected strong plasma in the plasma, known as the plasma oscillation event, which was triggered by coronal mass emission from the sun. In deep places and without the effect of sun interference. Its details Discovery Nature Communication was published today.

Launched in September 1977, Voyager 1 is now 14.1 billion miles from Earth, making it the farthest. Man-made objects (Voyager 2, sister search, 11.8 billion miles away). Voyager 1 is now out of Heliopos, A region sandwiched between warm solar plasma and the cooler interstellar at the outer edge of the solar system. Traveling at a speed of 36,000 miles per hour, the probe has now traversed interstellar space, an area characterized by an exceptionally low density of matter.

Unlike sibling 1, Voyager 1 can measure interplanetary medium plasma vibrations, thanks Its plasma wave system is on

“These vibrations occur at a very specific frequency, called the plasma frequency, which is directly related to the density of the plasma voyager,” explained Stella Oker, a PhD candidate at Cornell University and the first author of a new study. By measuring we can create a map of how plasma is distributed in Voyager’s trajectory, And learn more about the mechanisms that determine how plasma interacts and interacts with particles and magnetic fields in the interstellar medium. ”

Since 2012, Voyager has detected eight separate plasma oscillations, ranging in length from a few days to a full year. These events occur due to instability Electronic forecasting Shockwave advance produced by the sun

In early 2017, however, Voyager 1 began to detect a weakness, Still steady and unwavering, the plasma signature outside of these powerful events. Known as a “plasma wave emission”, the newly detected signal is narrower than the phenomena of plasma oscillation at about 40 Hz. More importantly, the signal was uninterrupted for about three years, which “corresponds to the distance traveled by the spacecraft of about 10 au”, which is about 930 million miles.According to the paper. Plasma wave emissions, with its narrow bandwidth, low amplitude, and multi-year persistence, appear to be distinct from shock-generated [plasma oscillation events], “Astronomers write in their research as.

That Voyager 1 is this low-The frequency was hum anExpected

“The signal for these vibrations is hidden just above the sound gate of the Voyager 1 plasma wave system equipment, so when we initially dig the data We didn’t really expect to get anything like this, ”Oker said.“ This identification pushes Voyager to the limit of what 1 can do.

The signal may be weak, but it is stronger than scientists think. This is an exciting result, according to Oker. “We detect these weak vibrations even when there is no visible mass emission by the sun, which means we are now able to measure the frequency of these vibrations and so whenever we want plasma density,” he said.

By directly sampling the properties of the centrifugal medium, astronomers can “learn a great deal about how our heliosphere is shaped and shaped by the centrifugal medium.” And what could be the effect of the conditions in the heliosphere, ”Oker added.

What’s more, measuring plasma densities along Voyager’s path could bring new information about the solar system’s stellar environment. “The solar system is actually moving through the interstellar medium, and Voyager 1 is traveling in the same direction as the Sun, so in a sense Voyager 1 is looking for a situation of intercentral mediation in front of us,” Oker said.

The new study now raises some important questions, such as the physical source of this extremely weak and constant plasma emission. And the team was only able to identify why these vibrations could start in 2017. The Voyager 1 mission is expected to last several more years which will certainly help. That said, O’Keefe is working on a future intercentric mission that would enable him to “measure the density of a continuous space with higher accuracy than Voyager.”

Thanks, such a Project Work is already underway. It’s amazing to acknowledge but our species now has a presence Inside Intercentric states

More: Voyager probes mark previously unknown events in deep space.



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