Tuesday , July 27 2021

Astronomers witness the struggle between David & Goliath galaxies [Report]



Astronomers, to the finest detail, have witnessed a war of David-vs-Goliath, between two nearby galaxies, breaking down fragments of each other and launching into a gas Magellanic Current, a cosmic river of blood surrounding the Milky Way.


The new study, led by the ANU, explored the violent settlement between the Great and Small Magellanic Clouds – dwarf galaxies on the periphery of the Milky Way, visible from the southern hemisphere to the naked eye.

Founder leader Dougal Mackey said his team showed a very weak map of the stars at the outer edges of the Clouds using the Dark Energy Camera on a 4m Blanco telescope in Chile and showed that the Clouds are interacting with each other over and over again. billions of years.

The School of Astronomy and Astrophysics Research in ANU Şey The fight was something that David and Goliath could have had if they hadn't had such a good chance of slinging a little boy,. Mackey said.

”The Big Magellanic Cloud really beats up a little friend – the outer parts of the Little Cloud are moving towards and away from the Big Cloud.“

The distribution of stars of different ages in the Small Cloud points to possible unpleasant encounters that date back to a few billion years before the Great Cloud.

”The Great Cloud, the one closest to the Small Magellanic Cloud, has been severely bumped and pruned, and the other parts of it have not been spared, as the other parts cause great distortions.“

Mackey said the results provide further evidence that Magellanic Stream has created bad and continuous conflicts between the two Clouds.

”The clouds will eventually be consumed by the Milky Way, but we want to know how long they stay and what kind of impact they will have before their final destruction,“ he said.

”So far, in the best detail, we have also shown that young stars are emerging in the Magellanic Current between the Clouds – this part of the stream is known as the Magellan Bridge.“

Mackey said the team also discovered a previously unknown small galaxy called Hydrus I, who sits between two Clouds.

Parç This galaxy is part of a class whose existence is only discovered about 10 years ago, known as very weak dwarfs. These are extremely low-gloss dwarf galaxies, but there's still too much dark matter, Bunlar he said.

There is a broad scientific consensus that scientists have a broad presence in the dark matter-universe that they cannot see, and that it helps explain how galaxies are separated from one another as they rotate.

”Hydrus I can be a satellite of both falling together with Cloud or the larger comrades of the Milky Way,. Mackey said.

Astronomers in the United Kingdom and the United States, Astrophysics Magazine Letters.

More information:
Dougal Mackey et al. Infrastructures and Tidal Distorsions in the Magellanic Stellar Perifer, Journal of Astrophysics (2018). DOI: 10.3847 / 2041-8213 / aac175

Chirp

Astronomers, to the finest detail, have witnessed a war of David-vs-Goliath, between two nearby galaxies, breaking down fragments of each other and launching into a gas Magellanic Current, a cosmic river of blood surrounding the Milky Way.

The new study, led by the ANU, explored the violent settlement between the Great and Small Magellanic Clouds – dwarf galaxies around the Milky Way, the southern hemisphere at night with the naked eye.

Founder leader Dougal Mackey said his team showed a very weak map of the stars at the outer edges of the Clouds using the Dark Energy Camera on a 4m Blanco telescope in Chile and showed that the Clouds are interacting with each other over and over again. billions of years.

The School of Astronomy and Astrophysics Research in ANU Şey The fight was something that David and Goliath could have had if they hadn't had such a good chance of slinging a little boy,. Mackey said.

”The Big Magellanic Cloud really beats up a little friend – the outer parts of the Little Cloud are moving towards and away from the Big Cloud.“

The distribution of stars of different ages in the Small Cloud points to possible unpleasant encounters that date back to a few billion years before the Great Cloud.

”The Great Cloud, the one closest to the Small Magellanic Cloud, has been severely bumped and pruned, and the other parts of it have not been spared, as the other parts cause great distortions.“

Mackey said the results provide further evidence that Magellanic Stream has created bad and continuous conflicts between the two Clouds.

”The clouds will eventually be consumed by the Milky Way, but we want to know how long they stay and what kind of impact they will have before their final destruction,“ he said.

”So far, in the best detail, we have also shown that young stars are emerging in the Magellanic Current between the Clouds – this part of the stream is known as the Magellan Bridge.“

Mackey said the team also discovered a previously unknown small galaxy called Hydrus I, who sits between two Clouds.

Parç This galaxy is part of a class whose existence is only discovered about 10 years ago, known as very weak dwarfs. These are extremely low-gloss dwarf galaxies, but there's still too much dark matter, Bunlar he said.

There is a broad scientific consensus that scientists have a broad presence in the dark matter-universe that they cannot see, and that it helps explain how galaxies are separated from one another as they rotate.

”Hydrus I can be a satellite of both falling together with Cloud or the larger comrades of the Milky Way,. Mackey said.

Astronomers in the United Kingdom and the United States, Astrophysics Magazine Letters.

More information:
Dougal Mackey et al. Infrastructures and Tidal Distorsions in the Magellanic Stellar Perifer, Journal of Astrophysics (2018). DOI: 10.3847 / 2041-8213 / aac175

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