The study reveals cosmic rays are driving galaxies' winds An important new hint regarding how galaxies halt intense episodes of star formation has been found by astronomers using the Karl G. Jansky Very Large Array (VLA) of the National Science Foundation. Their recent research on the nearby galaxy
. Their recent research on the nearby galaxy M33 suggests that fast cosmic ray electrons can generate winds that blow away the gas required for the formation of new stars.
M33 is a spiral galaxy that is almost 3 million light-years distant and is a member of the Local Group of galaxies, which also contains the Milky Way. Tabatabaei and an international team of scientists made detailed, multi-wavelength VLA observations of M33. Additionally, they made use of information gathered from earlier observations made with the VLA, the German Effelsberg radio telescope, millimeter-wave, visible-light, and infrared telescopes.
“The VLA observations indicated that cosmic rays in M33 are escaping the regions where they are born, making them able to drive more extensive winds,” said William Cotton, of theBased on their observations, the astronomers concluded that the numerous supernova explosions and supernova remnants in M33’s giant complexes of prolific star formation made such cosmic ray-driven winds more likely.
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Astronomers trace 84 bright blasts to colliding stars in ancient galaxiesRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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