Astronomers show galaxies emitting exhaust fumes

The study reveals how star formation pollutes the universe

Researchers have found that galaxies pollute the environment in which they live.

A team of astronomers led by Alex Cameron and Dean Fisher of the ARC Center for All Astrophysics in 3D (Astro 3D) confirmed that flow into the galaxy is extremely clean using a new imaging system at the WM Keck Laboratory in Hawaii. What flows.

The study was released today (August 30, 2021) Journal of Astronomy.

Dean Fisher, associate professor and co-lead researcher at the Center for Astronomical Physics and Supercomputing at the University of Swinburne in Australia, says:

“The path was made of hydrogen and helium. Using a new device called the Keck Cosmic Web Imager, we were able to ensure that stars made from this new gas, eventually by supernovae, would eject the bulk of the system.

“But these things are no longer beautiful and clean – they contain many elements, including oxygen, carbon and iron.”

The process by which atoms flow in galaxies – called “accumulation” – and their ejection – is called “exit” – is an important mechanism that controls the growth, mass, and size of galaxies.

Until now, however, only a combination of internal and external flows can be guessed. This study was confirmed in a galaxy other than the full-time cycle Milky Way.

To bring their findings to fruition, they focused on the constellation Mirk 1486, which is experiencing the fastest star formation period of about 500 light years from the Sun.

Dr. Alex Cameron, who recently traveled to the UK from the University of Melbourne in Australia, said, “We have found that there is a very clear system for how gases come in and out.” University of Oxford.

“Imagine a galaxy spinning on a frisbee disk. Relatively unpolluted gas enters the ocean from the outer universe and then condenses to form new stars. When those stars explode, they push another gas – which now contains these other elements – up and down.”

The elements – more than half of the timeline – are formed deep in the center of the stars by nuclear fusion. When stars fall or become new, results occur in the universe – a part of the matrix where new stars, planets and asteroids germinate, at least once in a lifetime.

Located on the “edge” of the Earth, the Mirk 1486 is the best candidate for observation because the flowing gas can be easily seen and its composition measured. Most galaxies fall into bad corners for these types of quests.

Professor Fisher added: “This work is important for astronomers because for the first time we have been able to establish the limits for the forces that strongly influence how galaxies form stars.”

“It’s a step closer to understanding how galaxies look and why they last – how long they last.”

Note: “DUVET Survey: MRk 1486 on 308 August 2021 Direct te-based mineral map of mineral concentrated emissions and mineral-poor arrivals Journal of Astronomy.
DOI: 10.3847 / 2041-8213 / ac18ca

Other contributing scientists are working at the University of Texas at Austin, the University of Maryland at College Park and the University of California at San Diego – all in the United States – and Concepcion University in Chile.

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