Shulou(Shulou.com)11/24 Report--

According to reports, astronomers are using the very large Array Telescope (VLT) to discover important new clues about how galaxies inhibit star formation. Their latest research on neighboring galaxy M33 shows that fast-moving cosmic ray electrons can drive wind and blow away the gas needed to give birth to stars, thereby inhibiting star formation.

As galaxies evolve, this ray wind slows star formation. However, shock waves from supernova explosions and jets of high-energy black holes from galactic cores are thought to be the main drivers of these ray winds. Cosmic rays are thought to be the second driver, especially in the M33 galaxy, which has a large number of star-forming regions.

"We have observed galactic winds driven by cosmic rays in the Milky way and Andromeda galaxies, which have low star birth rates," said Fatemah Tabatabaei, Iran's basic science research institute.

At present, Tabatabai and an international team of scientists have made detailed multi-wavelength very large array telescope observations of galaxy M33, a spiral galaxy about 3 million light-years from Earth. they also combined data from previous German Effelsberg, millimeter wave, visible and infrared telescopes.

Stars much more massive than the sun accelerate their life cycles and eventually explode into supernovae, where shock waves from the explosion accelerate particles close to the speed of light, producing cosmic rays, enough of which can create pressure that drives the wind to take away the gas needed to continue to form stars.

"very large array telescope observations show that cosmic rays in M33 galaxies leave their birth region very quickly, meaning they can drive more ray winds," said William Cotton of the National Radio Observatory.

Based on their observations, the conclusion is that the huge composite structure formed by a large number of supernova explosions and debris in galaxy M33 makes cosmic ray-driven winds more likely. "this means that cosmic rays may be the main cause of galactic wind formation, especially in the early days of the universe, when the rate of star formation was relatively short, and this mechanism is an important factor in understanding the evolution of galaxies over time," Tabatabai said. " The latest study is currently published in the October 25 issue of the monthly Proceedings of the Royal Astronomical Society.

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