Webb Finds 9,000 Star Clusters, Showing Massive Ones Escape Birth Clouds in 5 Million Years
Updated
Updated · spacedaily.com · May 24
Webb Finds 9,000 Star Clusters, Showing Massive Ones Escape Birth Clouds in 5 Million Years
3 articles · Updated · spacedaily.com · May 24
Nearly 9,000 young star clusters across four nearby galaxies showed the most massive clusters emerged from gas and dust after about 5 million years, while smaller clusters typically stayed embedded until 7 to 8 million years.
Webb’s infrared imaging pierced dusty nurseries and Hubble added ultraviolet and visible light, letting researchers classify clusters as embedded, partly emerged or exposed and measure the timing directly.
That roughly 2-million-year gap matters because earlier breakout lets more ultraviolet radiation escape into the wider galaxy, sharpening estimates of stellar feedback that drive star formation, gas recycling and galaxy growth models.
The result also strengthens the case that massive young clusters could leak ionizing radiation earlier than some simulations assumed, with implications for reionization studies and for planet-forming disks exposed to harsh radiation in dense clusters.
If the universe holds twice the star fuel we thought, will galaxies continue forming stars for much longer than we predicted?
A star cluster's size alters its fate by millions of years. How does this small time gap shape the evolution of entire galaxies?
Since massive stars destroy their nurseries so quickly, where are the safest places in a galaxy for new planets to form?