Science, Space and Technology News 2024
An artist’s impression of a quasar wind being launched off of the accretion disk around a supermassive black hole. Credit: NASA/CXC/M. Weiss, Catherine Grier and the SDSS collaboration
A team of researchers led by University of Wisconsin–Madison astronomy professor Catherine Grier and recent graduate Robert Wheatley revealed the accelerating gas using years of data collected from a quasar, a particularly bright and turbulent kind of black hole, billions of light-years away in the constellation Boötes. They presented their findings at the 244th meeting of the American Astronomical Society in Madison.
The bright light makes quasars nearly as old as the universe visible, and the broad range of their radiation makes them particularly useful for astronomers to probe the early universe. Scientists, including Grier, have suggested they’ve observed accelerating winds from black hole accretion disks before, but this had not yet been backed by data from more than a few observations. The new results came from about 130 observations of SBS 1408+544 made over nearly a decade, which allowed the team to solidly identify the increase in velocity with high confidence.
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