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With a recent NSF award, UA scientists will use... - A Spaceman, They Say I Am.
With a recent NSF award, UA scientists will use galaxy clusters as astronomical lenses to peer farther into the depths of space than any manmade telescope is capable of viewing - to the time when the universe’s earliest stars and galaxies still were forming from the gravitational collapse of gas and dark matter. The University of Arizona is renowned for making some of the world’s largest and most precise optics for some of the world’s greatest telescopes. Now, UA scientists are making use of lenses that defy human ability to build: They are made up of clusters of galaxies and dark matter. With a $600,000 grant from the National Science Foundation, UA professor of astronomy Ann Zabludoff and her team at Steward Observatory, including graduate students Ken Wong and Decker French, along with Mark Ammons at Lawrence Livermore National Laboratory and co-principal investigator Charles Keeton at Rutgers University, are working to find and analyze these cosmic lenses. By magnifying objects even farther way in space, these natural cosmic lenses may enable astronomers to see farther back in time than possible with any manmade telescope, to the time of the formation of the universe’s very first stars and galaxies. “We’re talking about stuff back to literally the dawn of time,” Zabludoff said. “Twelve billion years ago closing in on 13 billion years ago.” For years, astronomers have been trying to detect the very first stars and galaxies that formed after the Big Bang, Zabludoff said, to see how the stars and galaxies built up a mass of subatomic particles called baryons over time. “Baryons are the stuff of which we and the things in our experience are made,” said Zabludoff. Protons and neutrons, which make up the nuclei of atoms, are baryons. Effectively, all visible matter is made up of baryons and electrons. “What we do know about the gas distribution in the early universe is that it looks like this wonderful web, almost a spider web of gas,” Zabludoff said. “It’s natural to imagine that the galaxies form in the interstitial regions of these filaments and the baryons, including the gas, that we see fall into the galaxy.”   (Source: Phys.org/Milky Way Sci-FB)

With a recent NSF award, UA scientists will use galaxy clusters as astronomical lenses to peer farther into the depths of space than any manmade telescope is capable of viewing - to the time when the universe’s earliest stars and galaxies still were forming from the gravitational collapse of gas and dark matter.


The University of Arizona is renowned for making some of the world’s largest and most precise optics for some of the world’s greatest telescopes. Now, UA scientists are making use of lenses that defy human ability to build: They are made up of clusters of galaxies and dark matter. With a $600,000 grant from the National Science Foundation, UA professor of astronomy Ann Zabludoff and her team at Steward Observatory, including graduate students Ken Wong and Decker French, along with Mark Ammons at Lawrence Livermore National Laboratory and co-principal investigator Charles Keeton at Rutgers University, are working to find and analyze these cosmic lenses. By magnifying objects even farther way in space, these natural cosmic lenses may enable astronomers to see farther back in time than possible with any manmade telescope, to the time of the formation of the universe’s very first stars and galaxies. “We’re talking about stuff back to literally the dawn of time,” Zabludoff said. “Twelve billion years ago closing in on 13 billion years ago.” For years, astronomers have been trying to detect the very first stars and galaxies that formed after the Big Bang, Zabludoff said, to see how the stars and galaxies built up a mass of subatomic particles called baryons over time. “Baryons are the stuff of which we and the things in our experience are made,” said Zabludoff. Protons and neutrons, which make up the nuclei of atoms, are baryons. Effectively, all visible matter is made up of baryons and electrons. “What we do know about the gas distribution in the early universe is that it looks like this wonderful web, almost a spider web of gas,” Zabludoff said. “It’s natural to imagine that the galaxies form in the interstitial regions of these filaments and the baryons, including the gas, that we see fall into the galaxy.”
 
(Source: Phys.org/Milky Way Sci-FB)
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Posted on Wednesday, 17 October
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