Black Holes

A new study proposes that hypothetical dark stars, powered by dark matter, could account for three surprising observations from the James Webb Space Telescope in the early universe. These include ultra-bright blue monster galaxies, overmassive black holes, and mysterious little red dots. Researchers suggest these exotic stars formed quickly after the Big Bang and seeded supermassive black holes.

2026년 01월 26일 AI에 의해 보고됨

Astronomers at Maynooth University have explained how supermassive black holes formed quickly after the Big Bang through simulations of chaotic early galaxies. These conditions allowed small black holes to grow rapidly by devouring gas at extraordinary rates. The findings align with observations from the James Webb Space Telescope.

An international team of astronomers has found evidence that the material around supermassive black holes has evolved over billions of years, challenging long-held assumptions. Observations of quasars show a shifting relationship between ultraviolet and X-ray emissions from the early universe to the present. The discovery, led by researchers at the National Observatory of Athens, suggests that black hole environments are not static across cosmic history.

2025년 12월 26일 AI에 의해 보고됨

Astronomers have analyzed vibrations in a red giant star near a dormant black hole, uncovering evidence of a past stellar merger that defies expectations. The star, part of the Gaia BH2 system, appears ancient in chemistry but young in structure, spinning unusually fast. This discovery challenges models of stellar evolution in quiet black hole binaries.