A recent theoretical study has sparked debate in the scientific community by challenging the long-standing belief that a supermassive black hole exists at the centre of our galaxy. Researchers suggest that Sagittarius A* may instead be a dense concentration of dark matter, offering an alternative explanation for observed gravitational effects.
Traditionally, Sagittarius A* has been identified as a black hole due to the rapid motion of nearby stars, known as S-stars, which orbit the galactic centre at extremely high speeds. These observations have led scientists to estimate the mass of the object at nearly four million times that of the Sun.
However, the new model proposes that a compact core of dark matter particles could produce similar gravitational forces without forming a singularity or event horizon. This dense core, surrounded by a broader dark matter halo, could explain both the motion of stars and the overall structure of the galaxy.
The findings also raise questions about previous observations, including images captured by advanced telescopes that were interpreted as evidence of a black hole. Scientists suggest that similar visual features could result from strong gravitational lensing caused by a dense dark matter region.
While the theory remains under examination, it has important implications for astrophysics. If validated, it could reshape our understanding of black holes, dark matter, and the fundamental structure of galaxies.
