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Stunning Celestial Fireworks Celebrate Birth of Colossal Star Cluster - SciTechDaily

Stunning Celestial Fireworks Celebrate Birth of Colossal Star Cluster - SciTechDaily

Stunning Celestial Fireworks Celebrate Birth of Colossal Star Cluster - SciTechDaily
Jul 04, 2020 1 min, 28 secs

This is a multiwavelength mosaic of more than 750 ALMA radio images, and 9 Hubble infrared images.

ALMA shows molecular clouds (purple) and Hubble shows stars and glowing dust (yellow and red).

Astronomers created a stunning new image showing stellar fireworks in star cluster G286.21+0.17.

Most stars in the universe, including our Sun, were born in massive star clusters.

The image of cluster G286.21+0.17, caught in the act of formation, is a multi-wavelength mosaic made out of more than 750 individual radio observations with the Atacama Large Millimeter/submillimeter Array (ALMA) and 9 infrared images from the NASA/ESA Hubble Space Telescope.

Dense clouds made of molecular gas (purple ‘fireworks streamers’) are revealed by ALMA.

The stars in the image are revealed by their infrared light, as seen by Hubble, including a large group of stars bursting out from one side of the cloud.

The powerful winds and radiation from the most massive of these stars are blasting away the molecular clouds, leaving faint wisps of glowing, hot dust (shown in yellow and red).

This animated gif shows the structure and motions (speed in direction towards the Sun) of gas in the forming cluster, as seen with ALMA (purple) on top of the infrared Hubble image.

“This image shows stars in various stages of formation within this single cluster,” said Yu Cheng of the University of Virginia in Charlottesville, Virginia, and lead author of two papers published in The Astrophysical Journal.

“The phenomenal resolution and sensitivity of ALMA are evident in this stunning image of star formation,” said Joe Pesce, NSF Program Officer for NRAO/ALMA.

“Stellar Variability in a Forming Massive Star Cluster” by Yu Cheng, Morten Andersen and Jonathan Tan, 1 July 2020, The Astrophysical Journal.

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