Dark Matter

A University of Arizona team has determined that the Small Magellanic Cloud's chaotic star motions result from a collision with the Large Magellanic Cloud hundreds of millions of years ago. This impact disrupted the galaxy's structure and created an illusion of rotating gas. The findings, published in The Astrophysical Journal, challenge the SMC's role as a typical galactic example.

2026년 03월 17일 AI에 의해 보고됨

Scientists led by Fumihiro Naokawa have developed a new method to measure cosmic birefringence more precisely, a subtle rotation in the polarization of the cosmic microwave background. Their analysis indicates the birefringence angle may exceed the earlier estimate of 0.3 degrees due to phase ambiguity. The findings, published in Physical Review Letters, could aid in probing new physics related to dark matter and dark energy.

New computer simulations indicate that a faint radio signal from the early universe's dark ages could carry detectable traces of dark matter. Researchers from Japanese universities predict variations in this 21-centimeter signal that might reveal properties of the invisible substance. Lunar radio telescopes may soon capture these echoes to probe cosmic mysteries.

2026년 01월 19일 AI에 의해 보고됨

Researchers at the Perimeter Institute have created a new computational tool to model self-interacting dark matter, addressing a gap in previous simulations. This innovation allows for faster and more accurate studies of how such dark matter influences galaxy formation. The work, published in Physical Review Letters, could reveal insights into cosmic structures and black hole origins.