Telescópio Espacial James Webb recorded the first direct measurement of the mass of a supermassive black hole in the young universe. The central object of Abell2744-QSO1 weighs about 50 million times the mass of Sol. Ele sits at the center of a small red galaxy seen as it was 700 million years after Big Bang.
Pesquisadores mapped the movement of gas around the black hole. Analysis shows that it dominates the total mass of the system. The find opens up new discussions about how these giant objects emerged so early in cosmic history.
Como o James Webb measured the mass of the black hole
The team used the telescope’s NIRSpec instrument to observe the gas from orbit. The near-infrared spectrograph captured velocities that follow the exact Keplerian pattern. Esse movement indicates that almost all the mass is concentrated at a central point.
- The gas spins faster near the center
- The velocity curve confirms point gravitational attraction
- Previous Medições relied on indirect methods
- Agora mass was calculated directly from gas dynamics
The black hole represents at least two-thirds of Abell2744-QSO1’s total mass. The stars in the galaxy number much less. Esse imbalance challenges the classical model in which galaxy and black hole grow together over billions of years.
Abell2744-QSO1 belongs to the small red dot class
Esses Compact, reddish objects appeared in large numbers in initial observations of James Webb. Eles are common in the first billion years of the universe and almost non-existent today. Abell2744-QSO1 is the first in its class to have mass measured directly.
The surrounding galaxy is faint. The central black hole glows with near-primordial hydrogen and helium gas. The low metallicity reinforces that the environment was close to that of the initial universe.
Implicações for the formation of black holes
The result suggests that some supermassive black holes may have appeared before the galaxies that host them. Duas hypotheses gain strength from the data. One points to the direct collapse of massive gas clouds. Outra mentions primordial black holes formed shortly after Big Bang.
Roberto Maiolino, of Universidade of Cambridge, highlighted the impact. The finding represents a review of classic training scenarios. The articles were published on the same day in Nature and Monthly Notices of the Royal Astronomical Society.
Abell2744-QSO1’s black hole is more massive than all the stars in the galaxy combined. The proportion far exceeds what is seen in the local universe, where black holes represent a small fraction of the stellar mass.
Detalhes observation technicians with NIRSpec
NIRSpec’s integral field unit allowed it to map velocities at different distances from the center. The researchers compared the actual movement with that expected for different mass distributions. Apenas a point object explains the observed Keplerian rotation.
Ignas Juodžbalis and Cosimo Marconcini led parts of the work. The collaboration involved institutions such as Universidade of Florença, Instituto Max Planck and Universidade Ben-Gurion.
What changes for future studies of the early universe
Astrônomos now plans to observe more small red dots with the same technique. The objective is to understand whether Abell2744-QSO1 is an exception or represents a common pattern in the young universe. James Webb continues to deliver data that questions established models.
The discovery reinforces the role of the telescope as an essential tool for cosmology. Cada new direct measurement brings scientists closer to answers about the first chapters of the formation of cosmic structures.