Tag

Quasi Star

All articles tagged with #quasi star

James Webb Spots a New Cosmic Class: a Black Hole Star Wrapped in Gas
science2 hours ago

James Webb Spots a New Cosmic Class: a Black Hole Star Wrapped in Gas

Using the James Webb Space Telescope, researchers identified MoM-BH*-1—a black hole at its core surrounded by a dense gas shell that makes it look star-like, with about 100,000 solar masses and emitting energy about 100 billion times that of a typical star; it formed within 700 million years after the Big Bang. This discovery suggests many of the faint red dots seen in the early universe could be black hole stars embedded in young galaxies, potentially reshaping ideas about early black holes and galaxy growth.

Tiny Red Dots in the Early Universe Spur a New Quasi-Star Theory
science24 days ago

Tiny Red Dots in the Early Universe Spur a New Quasi-Star Theory

The James Webb Space Telescope spotted a population of compact red sources in the early universe. A quasi-star model—an unusually light black hole (~100,000 solar masses) embedded in a dense gas envelope—reproduces many observed features of these little red dots, including their brightness in visible/IR and hydrogen emission, suggesting rapid black hole growth within protogalaxies. The model, however, struggles to predict ultraviolet brightness and certain spectral/dust signatures, leaving questions for future observations.