Thursday , October 21 2021

Astronomers have witnessed the Galactic struggle of David and Goliath. [Report]



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Astronomers have witnessed a brutal David-vs-Goliath battle, which is still in the finest detail and still pounces close to each other and throwing them into the bloodless space of gas Magellan surrounding the Milky Way.


This new study, led by the ANU, investigated the intense fumes between the Atlantic around the Milky Way galaxy and the small Magellanic Cloud – dwarf galaxy visible to the naked eye at night.

Dr. Dougal Mackey, a senior researcher at ANU, used the Dark Energy Camera in the Blanco 4m telescope in Chile to create a map of very faint stars on the outer edge of the cloud, Said it repeatedly interacted with billions of years.

"This fight is very similar to what David and Goliath can have without the luck of shooting a little guy," said Dr. Mackey, an astronomy and astrophysics researcher at ANU.

"The Large Magellanic Cloud is actually defeating a small companion. The outside of the Small Cloud is stretched to the Large Cloud, or to a large distance."

The distribution of stars at different ages in Small Cloud indicates that unpleasant encounters with huge clouds occurred billions of years later.

"The large cloud certainly does not get out of this brawl because the closest side to the small Magellanic cloud is heavily distorted and pruned, and the other part of the outcrop shows great distortion."

Dr. Mackey gave the evidence that the uncomfortable and lasting conflict between the two clouds created the Magellanic city.

"Clouds will ultimately be consumed entirely by the Milky Way, but we want to know how long they have left and what impact they will have before the ultimate destruction," he said.

"We also see the youngest stars formed in the clouds in Magellan City as the best details ever – this part is called the Magellan Bridge."

Mackey said the team found a previously unknown small galaxy called Hydrus I sitting between two clouds.

"This galaxy is part of a class known as a superficial dwarf, and its existence was discovered about ten years ago," he said. "These are dwarf galaxies of very low brightness, but still have a lot of dark matter."

There is a broad scientific consensus that dark matter that can not be seen by scientists is widely present in space and helps explain how the galaxy rotates.

"Hydrus is more likely to be a cloud, or a satellite that falls into the galaxy with both of his big colleagues," Dr. Mackey said.

British and American astronomers supported this research. Astrophysical Journal Letters.

Additional information:
Dougal Mackey et al. The substructure and tidal disturbance around Magellanic Stella, Astrophysics Journal (2018). DOI: 10.3847 / 2041-8213 / aac175

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Astronomers have witnessed a brutal David-vs-Goliath battle, which is still in the finest detail and still pounces close to each other and throwing them into the bloodless space of gas Magellan surrounding the Milky Way.

This new study, led by the ANU, investigated the intense fumes between the Atlantic around the Milky Way galaxy and the small Magellanic Cloud – dwarf galaxy visible to the naked eye at night.

Dr. Dougal Mackey, a senior researcher at ANU, used the Dark Energy Camera in the Blanco 4m telescope in Chile to create a map of very faint stars on the outer edge of the cloud, Said it repeatedly interacted with billions of years.

"This fight is very similar to what David and Goliath can have without the luck of shooting a little guy," said Dr. Mackey, an astronomy and astrophysics researcher at ANU.

"The Large Magellanic Cloud is actually defeating a small companion. The outside of the Small Cloud is stretched to the Large Cloud, or to a large distance."

The distribution of stars at different ages in Small Cloud indicates that unpleasant encounters with huge clouds occurred billions of years later.

"The large cloud certainly does not get out of this brawl because the closest side to the small Magellanic cloud is heavily distorted and pruned, and the other part of the outcrop shows great distortion."

Dr. Mackey gave the evidence that the uncomfortable and lasting conflict between the two clouds created the Magellanic city.

"Clouds will ultimately be consumed entirely by the Milky Way, but we want to know how long they have left and what impact they will have before the ultimate destruction," he said.

"We also see the youngest stars formed in the clouds in Magellan City as the best details ever – this part is called the Magellan Bridge."

Mackey said the team found a previously unknown small galaxy called Hydrus I sitting between two clouds.

"This galaxy is part of a class known as a superficial dwarf, and its existence was discovered about ten years ago," he said. "These are dwarf galaxies of very low brightness, but still have a lot of dark matter."

There is a broad scientific consensus that dark matter that can not be seen by scientists is widely present in space and helps explain how the galaxy rotates.

"Hydrus is more likely to be a cloud, or a satellite that falls into the galaxy with both of his big colleagues," Dr. Mackey said.

British and American astronomers supported this research. Astrophysical Journal Letters.

Additional information:
Dougal Mackey et al. The substructure and tidal disturbance around Magellanic Stella, Astrophysics Journal (2018). DOI: 10.3847 / 2041-8213 / aac175

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