XRISM uncovers a mystery in the cosmic winds of change
Peer-Reviewed Publication
In honor of Global Astronomy Month, we’re exploring the science of space. Learn how astronomy connects us through curiosity, discovery, and a shared wonder for what lies beyond.
Updates every hour. Last Updated: 28-Dec-2025 13:11 ET (28-Dec-2025 18:11 GMT/UTC)
The X-Ray Imaging and Spectroscopy Mission (XRISM) has revealed an unexpected difference between the powerful winds launching from a disc around a neutron star and those from material circling supermassive black holes. The surprisingly dense wind blowing from the stellar system challenges our understanding of how such winds form and drive change in their surroundings.
Modern helicopters employ swept, dihedral blade-tip and nonlinear twist to enhance its aerodynamic performance, which also increase manufacturing complexity and induce significant vibratory loads, and thus vibration reduction of NTBT (New Type Blade-Tip) rotors has become a key research focus. Due to the excellent compatibility and quick response, the TEF (Trailing Edge Flap) technology is promising for rotor vibration reduction. Nevertheless, most aeroelastic researches have been focused on TEF technology or NTBT rotor, respectively, the combinations of TEF/NTBT rotor system remain hardly explored. The CFD/CSD (Computational Fluid Dynamics/Computational Structural Dynamics) method is competent to meet this challenge, which can effectively consider the unconventional blade platforms, unsteady flowfields, and structural dynamics. Therefore, the present aeroelastic study on TEF/NTBT rotor based on CFD/CSD method holds significant theoretical value and engineering importance.
A $4 million grant from the John Templeton Foundation enables a team of scholars from USC, the University of California, Riverside, and the Carnegie Science Observatories to establish a unique research hub to study, through novel methods, dark matter and neutrinos.
An “Einstein Cross” is a rarely seen cosmic configuration, in which the light from a distant galaxy is bent by the gravity of galaxies in front of it, creating four images. But scienitsts have found an extra image in an Einstein Cross -- a fifth point of light. This, they found, pointed to “something unusual,” which turned out to be a massive, hidden halo of dark matter. The existence of this invisible structure could only be inferred through careful computer modeling and analysis. The discovery, made by an international team is now being published in The Astrophysical Journal.