A recent study by Dr. Catalina Casanueva, published in the journal *Astronomy & Astrophysics*, explores the potential impact of primordial black holes (PBHs) on the cosmic microwave background radiation (CMB). PBHs, hypothesized to have formed shortly after the Big Bang, are considered candidates for dark matter.
The research indicates that PBHs with masses equal to or greater than the Sun's mass cannot constitute more than 1% of dark matter. However, even this small percentage could explain some of the unexplained X-ray excess observed in the universe. The study used a detailed physical model to calculate the emission from PBHs, offering more reliable predictions.
These findings contribute to the ongoing discussion about the nature of dark matter and the early universe. Future research involves simulations of the early universe to study the impact of PBHs on galaxy formation and structure growth, which is crucial for interpreting data from new telescopes and missions.