August 31st, 2024

Astronomers puzzled by little red galaxies that seem impossibly dense

Astronomers have discovered "little red dot" galaxies with high star density using the James Webb Space Telescope, challenging existing theories on galaxy formation and raising questions about star survival in dense environments.

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Astronomers puzzled by little red galaxies that seem impossibly dense

Astronomers are intrigued by newly discovered "little red dot" galaxies observed by the James Webb Space Telescope (JWST). These galaxies appear to be exceptionally dense, containing a higher concentration of stars than any previously known galaxies. The density of stars in these galaxies raises questions about their formation and survival, as it seems improbable that stars could coexist without colliding. The discovery was made shortly after JWST began its exploration of the distant universe in 2022, revealing these bright, red, and seemingly small galaxies. The findings challenge existing theories regarding galaxy growth and evolution, prompting further investigation into how such dense star formations can exist without leading to catastrophic interactions among the stars.

- JWST has identified "little red dot" galaxies with unprecedented star density.

- The high density of stars challenges current understanding of galaxy formation.

- These discoveries were made during JWST's exploration of the distant universe starting in 2022.

- The findings raise significant questions about the survival of stars in such dense environments.

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Link Icon 9 comments
By @riidom - 5 months
By @nacho-daddy - 5 months
Is this what a group of type III civilizations look like on the Kardashev scale? Back when the universe was hot and dense and it was still fun?
By @Keysh - 5 months
The preprint version of the main paper being discussed: https://www.arxiv.org/abs/2408.07745
By @m3kw9 - 5 months
Must be heck of a night sky on one of those planets
By @wizardforhire - 5 months
My personal hope is that they’re white holes that have been heavily red shifted… probably gonna be something way less exciting but none the less interesting.
By @montjoy - 5 months
> it was missing other key features seen with black holes, such as X-rays and radio waves. There were also other features, such as a peak in the light’s brightness at certain frequencies, that suggested it came from stars

Amateur speculation:

A dense group of stars tightly circling an early forming supermassive black hole? The stars would be able to (mostly) block the radio and x-rays.

By @sesm - 5 months
Can those be just globular clusters in their 'bright' phase? Globular clusters are not even mentioned in that article, which is weird.
By @moi2388 - 5 months
“Unlock this article”

Please stop linking to paywalls ffs.