Galaxies as ‘cosmic cauldrons’
Star formation within interstellar clouds of gas and dust, so-called molecular clouds, proceeds very rapidly yet highly inefficiently. Most of the gas is dispersed by stellar radiation, revealing galaxies to be highly dynamic systems, like “cosmic cauldrons,” consisting of components that constantly change their appearance. Based on new observations of the NGC 300 spiral galaxy, a team of scientists led by astrophysicist Dr. Diederik Kruijssen from Heidelberg University has now managed for the first time to reconstruct the time-evolution of molecular clouds and the star formation process within them. Their analysis shows that these clouds are short-lived structures undergoing rapid lifecycles, driven by the intense radiation from the new-born stars. The findings are published in Nature.
phys.org
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2019-05-23
