The Gaia mission, which has recently be a celestial survey of 1 billion stars in the milky way Galaxy. They are watching the beautiful celestial features, such as mountain ranges, arches, and streams of stars. (Credit: ESA/Gaia/DPAC / CC-BY-SA 3.0 IGO)
To us, the night sky would look like a random splattering of stars, but astronomers are learning that in some regions of our own milky way galaxy, the stars are just clumped up in positions similar to those found in Earth’s streams, waves, curves, and mountains.
Tectonic activity creates the Earth, the wide range of functions, but the scientists are not sure what to make of this stellar finding in the milky way Galaxy. Now, researchers are testing for a reason, including by forces coming from outside our galaxy. The real negative, though, and perhaps the Galaxy itself.
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The scientists have described the Milky way as well as in a ruled, spiral galaxy, the milky way, in particular in the form of a sunny-side-up egg, with a pinwheel-distribution of the stars. However, on a much smaller scale, there is a lot of detail hidden in this celestial topography.
Since 2013, an European Space Agency mission, called Gaia, that is, a census of the milky way Galaxy, with the goal of cataloguing more than 1 billion stars. With the help of the new data, released in April of 2018, with the exact measurements of the stars’ locations and movements, and for an additional 550 million, the objects, the astronomers have now set out to explore the galaxy with a new level.
While this is a galactic exploration, have discovered a new field, such as ridges and arches, and the scientists have not been able to fully explain how the star structures can be formed. A team led by astronomers at the University of Sydney, Australia, decided to try to recreate it in computer models, a few of the features that they see in the stars.
The researchers focused on a set of eight fields in the Milky way, which is folded up next to each other, such as a mountain range. The However, the data showed that the ridges, which are wedged together, the middle layer of the Milky way’s disk, had been each of the sets of unique, star-studding their story. With the help of data from another mission, which will analyse the composition of stars, they noticed that all of the stars had elemental compositions that were similar to that of the sun. Since the elemental composition can indicate stellar age, this is something that these young stars were not spread out as much as the older star, that will help in the understanding of how the ridges are to be formed.
Theories of how these fields and other features that are created will be classified into one of two categories: internal and external. Some theories suggest that the internal galaxy structures are the key to the formation of the galactic geography. For example, the gravitational interactions are able to generate resonant waves that are larger clumps of matter from the smaller one. You can also adjust the friction between the stars, gas and dust in the galaxy can lead to the creation of the topographical characteristics, such as the clothes in the washing machine, will be lost to each other as they move past each other in the cleaning process. Other theories claim that some external function that moves through the galaxy, as well as other small or dwarf galaxy, which is a bit wrinkled, and the stars. (In this picture, the theory, do you drag your feet when you cross a carpet, so that it does not need to expand it.)
The team used a computer simulation of the internal and external processes, in order to see whether or not the distribution of the stars could not be made under a variety of conditions. They found that the situation is better to be made in remote areas, by means of an in-house process, the so-called phase-mixing, in which groups of stars, and gradually to the mix like rum and coke is stirred into a cocktail, due to the transformation of the spiral arms, in the course of time. In addition, the presence of young stars, they don’t have as much time to drive as an older star, the ridges are set at a nearby power source to function. In the simulation, regions that are all gravity-get hit by a passing galaxy, and the results showed that a much larger spines than those seen in the milky way Galaxy.
Thus, the height of the ridges can be a way to make a distinction between the internal and external processes,” said Shourya Khanna, an astronomer at the University of Sydney and lead author of the paper.
There are a number of limitations, though. The researchers have yet to model the gas in the simulation, which can have an impact on the results. The research has found evidence that a nearby star system once passed through the milky way Galaxy. It can be this type of remote interaction, which tends to make the flow of the stars, as the in-house processes, such as a phase-mixing — responsible for the fields, the study suggests. With many of the stars from the left side to the catalog, Gaia, may, however, astronomers more clues about the forces that shape our galaxy, the milky way is a beautiful, geographically.
“The region of the milky way galaxy where we are at the moment, a lot of the information is very, very close to the sun, but in the future, Gaia-releases-need to increase the size of the area,” said Alice Quillen, an astronomer at the University of Rochester, who was not involved in the study.
The scientists published their findings online in the preprint journal arXiv, and submitted it for publication in the journal Monthly Notices of the Royal Astronomical Society.
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Originally published on Live Science.