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Ultraviolet aurora seen on Comet 67P / Churyumov-Gerasimenko. Using data from various devices on ESA’s Rosetta mission, researchers have found evidence of a distant ultraviolet aurora on Comet 67P / Churyumov-Gerasimenko.

This mosaic of four false-color images contains images taken on February 3, 2015 from a distance of 28.7 km from the center of Comet 67P / Churyumov-Gerasimenko. The mosaic measures 4.2 x 4.6 km.

On Earth, the aurora occurs when electrically charged particles accelerating from the sun hit the upper atmosphere to form a glow of green, white, and red. In other parts of the solar system, Jupiter and some of its moons.


As well as Saturn, Uranus, Neptune, and even Mars, have exhibited their own version of the auroraThe Rosetta spacecraft survived Comet 67P / Churyumov-Gerasimenko for more than two years.

The data from the current study is based on what Rosetta scientists initially interpreted as “ow deglo,” the process of contact with the coma caused by photons and surrounding the comet’s nucleus.

But the new analysis of the Rosetta data offers a very different picture. 67P / Churyumov-Gerasimenko has a kind of glow around him, lead authors Drs. Marina Galand is a researcher at Imperial College London.

By combining data from multiple Rosetta devices, we were able to get a better picture of what we were doing. This allowed us to identify how the ultraviolet atomic forms of 67P / Churyumov-Gerasimenko occur.

Source of energetic electrons responsible for the emission of far ultraviolet (FUV) in comet 67P / Churyumov-Gerasimenko: electron paths of the solar wind inducing auroras FUV around the comet.

They undergo an acceleration through the ambipolar electric field created by the complement plasma.

Electron trajectories are shown along energy color-coded lines and the ambipolar electric field acting on electrons is filled with green arrows. The data indicates that the 67P / Churyumov-Gerasimenko emission are actually antennas in nature.

Electrons flowing into the solar wind interact with the gas in the comet’s coma, breaking down water and other molecules. The resulting atoms emit a specific far ultraviolet light.

The naked eye far ultraviolet has the shortest radiation wavelength in the ultraviolet spectrum.

Exploring the 67P / Churyumov-Gerasimenko emission will help researchers understand how particles in the solar wind change over time, something that is important for understanding space weather throughout the solar system.

By providing better information on how radiation from the sun affects the atmosphere of space, such information can ultimately help protect satellites and spacecraft.

As well as astronauts traveling to the moon and to Mars. Johns Hopkins University scientists Drs. Paul Feldman said, “Rosetta is the gift that keeps on giving.”

You have returned to Comet’s two-year journey into the data hoard, which has allowed us to rewrite the book on these more extraterrestrial inhabitants of our solar system, and there is still much to come.

The findings were published in the Journal Nature Astronomy. Unexpected ultraviolet aurora detected on a comet by the Rosetta spacecraft. ESA’s Rosetta mission shows a unique aurora near Comet 67P / Cherumov-Gerasimenko.

Data from the Southwest Research Institute instruments on ESA’s Rosetta spacecraft helped reveal the aroma emissions in the far ultraviolet surrounding a comet. When charged particles from the Sun form on Earth.

And our planet’s magnetic field lines follow the north and south poles. There, particles from the Sun meet atoms and molecules in Earth’s atmosphere and form shimmering curtains of colored light in the sky at high latitudes.

Similar phenomena have been observed on various planets and moons in our solar system and even around a distant star.

SwRI’s instruments, the Alice Fern Ultraviolet Spectrograph (FUV) and the Ion Electron Sensor (IES), help locate these novels on Comet 67P / Churyumov-Gerasimenko (67P / CG).

Charged particles from the sun flowing over the comet in solar energy interact with the gas surrounding the comet’s dusty and icy nucleus to create the atmosphere, said Dr. Jim Burch, vice president of Swai.

Who has led IES. “IES Instruments discovered electrons that caused Aurora. The gas envelope located around 67 KO / gas, known as a “coma”, is excited by the glow of particles from the sun and ultraviolet light, an interaction recorded by the Ellis FUV instrument.

At first we thought the ultraviolet emissions from Comet 67P are known as ‘daylight’, a process caused by compaction of solar gases, said Dr. Joel Parker of Sweary, who Ellis drives the surrogate. The emission is the aurora.

Which is powered not by photons but by electrons from the solar wind that break up the water and other molecules in the coma and accelerate the area around the comet. Let’s bring it. The resulting excited atoms make up this specific light. “

Dr. from Imperial College London. Marina Galand led a team that used a physics-based model to integrate measurements made by various instruments aboard Rosetta.

This way, we don’t have to rely on a single instrument data set, said Galand, lead author of the Nature Astronomy paper describing this discovery.

Instead, we can put together a larger data set with multiple devices to get a better idea of what is going on. This allowed us to clearly identify how ultraviolet nuclear emission from the 67P / CG form occurs and reveal its femoral nature.

Ism Lagili Haber: Caltech’s use of seismic innovation underscores climatology shaking up climate science. I studied the molecules of the earth for five decades, Birch said. It is surprising and surprising to find aurors around 67P that lack a magnetic field.

After harmonizing with 67P / CG in 2014-2016, Rosetta provides data showing how the sun and solar winds have exchanged with comets. In addition to the discovery of these comet auroras.

The spacecraft was the first to orbit the comet’s nucleus, flying alongside the comet as it entered the inner solar system. And the first to send a lander to the surface of the comet.

Other instruments that contributed to this research were the Rosetta Langmuir Probe (LAP), the Rosita Orbiter Spectrometer for Ion and Neutral Analysis (Rosina), the Rosetta Orbiter Microwave Instrument (MIRO).

The Infrared and Visible Thermal Imaging Spectrometer. Rosetta is an ESA mission with contributions from its member states and NASA. Phila Lander of Rosetta is provided by a consortium led by DLR, MPS, CNES, and ASI. Airbus Defense and Space built the Rosetta spacecraft.

NASA’s Jet Propulsion Laboratory (JPL) manages the US contribution of the Rosetta mission to NASA’s Science Mission Directorate in Washington, under contract with the California Institute of Technology (Caltech).

JPL also produced a microwave instrument for the Rosetta orbiter, and its principal investigator, Dr. Mark Hoffstatter, is. SwRI (San Antonio and Boulder, Colorado) developed ion and electron sensors and the Rosetta Orbiter Ellis instrument and is home to its leading researchers.


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