Astronomers from Australian National University (ANU) and CSIRO have most experienced the slow death of a nearby dwarf alcax, which…
Astronomers from Australian National University (ANU) and CSIRO have most experienced the slow death of a nearby dwarf alcax, which gradually loses its power to form stars.
The new peer-reviewed study of Small Magellanic Cloud (SMC), which is a small fraction of plant size and mass, uses images taken with CSIRO’s powerful Australian SKA Pathfinder (ASKAP) radio telescope array.
Head Researcher Professor Naomi McClure-Griffiths from ANU said that the radio imaging features were more than three times finer than previous SMC images, allowing the team to investigate the interactions between the little galaxy and its environment with more accuracy.
“We could observe a powerful outflow of hydrogen from the little magellan cloud,” said Professor McClure-Griffiths from Astronomy and Astrophysics Research School at ANU.
“The implication is that the galaxy can finally stop b eing to form new stars if it loses all its gas. Galaxies that end up forming stars gradually fade away in oblivion. It’s a slow death for a galaxy if it loses all its gas. “
Professor McClure-Griffiths said the discovery, which is part of a project investigating the development of galaxies, gave the first clear observation of the amount of mass lost from a dwarf wax.
“The result is also important because it provides a possible source of gas for the huge Magellanic Stream that surrounds the Milky Way,” she said. “Finally, the little Magellanic Cloud is likely to eventually be gobbled up by our Winter Street.”
CSIRO researcher Dr David McConnell said that ASKAP was unrivaled in the world for this kind of research because of its unique radio receiver that gives it a panoramic view of the sky. “The telescope covered the entire SMC galaxy in a single shot and photographed its hydrogen with unmatched detail,” he said.
Hydrogen is the most abundant element in the universe and is the main subject of stars.
“ASKAP will go on making state-of-the-art images of hydrogen in our own Milky Way and Magellanic Clouds, giving a complete understanding of how this dwarf system joins our own galaxy and what this teaches us about the development of other galaxies,” Sade Dr. McConnell.
Australian National University
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