Tag

Population Iii

All articles tagged with #population iii

astronomy4 days ago•55 min saved

Cosmic fossil star unlocks secrets of the universe's first generations

Astronomers identified PicII-503, an extremely metal-poor second-generation star in the dwarf galaxy Pictor II, with just 1/40,000th the Sun's iron and a striking carbon overabundance. This rare star acts as a fossil record of the universe's earliest element production, offering clues about how the first stars enriched later generations and linking to signatures seen in Milky Way halo stars; the discovery was reported in Nature Astronomy.

via Space|

#astronomy #pictor-ii #population-ii

science19 days ago•101 min saved

Could JWST’s Tiny Dots Hint at the Universe’s First Monster Stars

A study linked to the James Webb Space Telescope’s “little red dots” proposes they could be the first generation of supermassive stars (Population III) rather than powered black holes. The team modeled metal-free supermassive stars approaching a million solar masses and found their brightness and spectral features match two observed dots, MoM-BH*-1 and The Cliff, suggesting these stars might eventually collapse into the universe’s first supermassive black holes. If correct, these stars would live only a very short time (around 10,000 years at such masses), limiting how often we might see them; lack of X-ray signals could fit the star scenario, though accreting black holes remain an alternative. Future radio observations could decisively test the idea by detecting emission that would escape if black holes power the dots.

via Live Science|

#black-holes #jwst #little-red-dots

science2 months ago•6 min saved

Scientists Possibly Detect Light from the Universe's First Stars

Scientists may have identified light from the universe's first stars, known as Population III, using the James Webb Space Telescope and gravitational lensing, marking a significant breakthrough in understanding the early cosmos.

via 404 Media|

#cosmology #first-stars #gravitational-lensing