Japan Space Forum

Scalarization of Einstein–Euler–Heisenberg black hole with multiple horizons

Abstract Scalarizations of the Einstein–Euler–Heisenberg (EEH) black hole (EEHBH) with multiple horizons are investigated in the EEH-scalar theory by introducing a quadratic scalar coupling to the Maxwell term. For mass $$M=1$$ M = 1 and Euler–Heisenberg parameter $$\mu =0.03$$ μ...

36Cl concentrations from polar ice cores set new constraints on the Carrington event.

The Carrington event of 1859 CE is considered one of the largest geomagnetic storms of the observational era and often used as a benchmark for a worst-case scenario. Yet, there exists no robust evidence of an associated solar energetic particle (SEP) event of a significant magnit...

Sensory nerves regulate bone homeostasis in response to mechanical unloading or reloading: evidence from a spaceflight experiment and ground-based mechanical unloading models

Mechanical loading is crucial for maintaining bone mass, and understanding how bone remodels in response to mechanical loading is essential for treating musculoskeletal disorders. Recently, sensory nerves inside bone were identified as mechanical regulators of bone homeostasis. H...