James Webb Space Telescope data reveals supermassive stars and gravitational arc candidate

Recent analyses of data from the James Webb Space Telescope (JWST) have led to significant astrophysical findings regarding early universe phenomena.

A team led by Devesh Nandal proposes that the mysterious "little red dots" observed in the early universe are actually supermassive stars with up to 100,000 solar masses. These stars likely underwent violent pulsations, expelling gas layers that created dense cocoons of hydrogen, helium, and nitrogen. This model suggests these colossal stars may be the precursors to the supermassive black holes found in the early cosmos.

Separately, astrophysicist Homer Dávila Gutiérrez has identified a potential gravitational arc, designated A1, in public JWST images. Located behind the galaxy cluster MACS J0308.9+2645, the object's elongated and curved shape suggests it is being magnified by gravitational lensing. While initial estimates placed the object's redshift at z=4.4, updated measurements indicate a redshift near z=1.4, placing the galaxy as it appeared approximately 9 billion years ago.