Astronomers analyzing James Webb Space Telescope data have discovered an extreme cosmic object dubbed MoM-BH*-1, which outshines its host galaxy and combines stellar and black hole characteristics. Researchers suggest these black hole stars
may explain mysterious early-universe little red dots and the origin of supermassive black holes.
When astronomers first spotted compact, exceptionally bright red objects in early-universe data captured by the James Webb Space Telescope, they initially suspected an instrument glitch or extraordinarily massive early galaxies. Four years of subsequent analysis have instead led researchers to propose a completely new astrophysical classification: the black hole star,
an ancient entity that bridges the behavior of black holes and stellar bodies.
The Discovery of MoM-BH*-1 and the Mirage Survey
The discovery emerged from a targeted astronomical effort called the Mirage or Miracle (MoM) survey, designed to identify the furthest and oldest galaxies in the universe. Led by researchers including Rohan Naidu, an astronomer at the University of Hawaii and an MIT astrophysicist, the survey initially sought to separate ancient galactic light from optical illusions.
While inspecting survey images, the team flagged an inexplicably bright red dot.
“The break we observed in this object is the deepest break we have ever observed in any object, ruling out ‘ordinary’ stars as the source.”
Rohan Naidu, Astrophysicist at MIT
Unraveling the Physics of a Black Hole Star
To account for a luminosity reaching 100 billion times the brightness of a standard star without relying on nuclear fusion, researchers incorporated a growing supermassive black hole into their simulations. The resulting theoretical object—designated MoM-BH*-1—consists of a central black hole roughly 100,000 times as massive as the sun, enveloped by a star-like gas cloud comparable in physical size to the entire solar system.
Rohan Naidu noted that the object effectively outshines its entire host galaxy, allowing astronomers to observe what he described as pure
black hole star light.
Connecting the X-Ray Data and Little Red Dots
The black hole star hypothesis has gained substantial momentum from complementary investigations into the broader population of little red dots
scattered across early-universe imagery.
Further reinforcing the connection, astronomers analyzing archival data from NASA’s Chandra X-ray Observatory identified a coincident X-ray source catalogued as 3DHST-AEGIS-12014, sitting in the exact same location as a little red dot observed by Webb.
Implications for Early Galaxy Evolution
For decades, how supermassive black holes formed so rapidly in the early universe has remained one of astronomy’s most persistent enigmas. Traditional models struggled to explain how black holes weighing millions or billions of solar masses could emerge so soon after the Big Bang.
The identification of black hole stars offers a compelling answer to this top-down formation puzzle. By acting as precursors or heavy seed nurseries, these gas-swaddled entities may represent the early birth stages of every supermassive black hole, while little red dots themselves may simply be black hole stars embedded within expanding host galaxies.
