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The Ophion Stars site (yellow points) as it appears in the sky. Ophion seems to cover a large area of the sky because it is relatively close to us. | Credit: ESA/GAIA/DPAC
It seems that a huge family of newborns is now walking on its separate path: more than 1,000 stars are hurriedly escaping from their nest, which leads to a bit of ambiguity regarding the issue of this star separation.
It usually takes a few hundred years to pool to Stars This is generated together to separation, it was gradually overcome by the tidal forces from each other and other things that pass. For example, the famous Pleiades Star Cluster (Messenger 45) collection, which is a narrow collection of young audio -visual stars in the naked eye constellation to Taurus, TaurusIt is 100 million years old, while the Beehive (Messenger 44) group Cancer, crabIt is about 600 million years old (and a little more than Pleiades).
However, it appears that a group of newly discovered young stars, hardly 20 million years, play with a different set of rules. Using data from the European Space Agency Gaya missionWhich measured the situation, speed, distance, and spectra of nearly two billion star astronomers, led by Dylan Hoson from Washington University, Washington, that a thousand stars of this new group are all move quickly to stay together.
The group is about 650 light years old Ophiuchus, snake holderAnd the “OPHION” was called in honor of the residence constellation.
Ophion is filled with the stars that are appointed to the rush Galaxy Houn said in a statement. “What’s more, this will happen in a small part of the time it usually takes for such a large family to excite. There is no other family that we have never seen before.”
The range of speeds in the stars group is known as speed dispersion. Since the giant molecular clouds that give birth to the stars are cold, they have a low energy and thus low -speed dispersion just a few kilometers per second, which must be transferred to their emerging stars.
This means that the mass stars should all move more or less than the same low speed, allowing their mutual weight to maintain it for a longer period. The speed dispersion in Ophion, as measured by GAIA, is much larger than usual, 20 km (12.4 miles) per second. In other words, the difference between the fastest and slower moving stars in Ophion is 20 km per second.
With high speed dispersion, Ophion will quickly fly. The only reason that we have seen these stars together at the present time is that they are very young and they have not had the opportunity to separate them yet.
“We do not know exactly what happened to this star’s family to make her behave in this way, because we did not find anything like him before,” said Marina Konkel from the University of North Florida, who was part of the discovery team. “It is a mystery.”
The presence of Ophion was not immediately clear. The Huson and Kounkel team was testing a new model, called Gaia Net, which can simultaneously analyze the spectra of millions of stars, when the group came out of the data.
Jayhand Sahlman, a Jaya project in Jaya, Jaya, said the Jaya Project in Jaya, “said Jaya,” European Space Agency. “It is still very new to be able to measure the criteria of many young stars reliably.
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So, what prompted Ophion stars to get out of their own paths in such a wheel early in their lives? While checking the GAIA data, the Huson team noticed many large voids – the areas where it is Supernova Gas shock waves exploded between stars. Astronomers release these “wonderful bubbles” voids, and a lot of remaining gas can be detonated in Ophion after its stars are also formed by the waves of the astral explosion. The loss of a lot of mass in Star all this gas had the effect of reactions, which reduced the group’s grip on its stars. The tidal effects of gravitational arelands can be from the mass of areas that make up neighboring stars have given Ophion stars an additional boost.
“He exciting, it changes the way we think about the stars groups and how to find them. The previous methods that were identified for families by assembling the same animated stars together, but Ophion would have slipped across this network,” Konkel said. “Without GAIA high -quality data collections, and new models that we can now use to dig into this, we may have missed a large piece of star puzzle.”
So there may be other young families from the stars there are racing. Our view of Ophion is like an adult image before they leave the college. They are on their way, but they have not yet left the nest. When these stars end up, anyone who guesses, but they are scheduled to wander around the spacecraft alone.
The Huson team puts the Gaia Net model in A. New studyIt was published on April 25 in the Journal of Astronomical Physics.
