Galactic Ripples in a Turbulent Sea: Can Phase Spirals Survive the Clumpy Interstellar Medium?
The paper explores whether the Milky Way’s phase spiral—a ripple in stellar motion—can persist in a clumpy, star-forming interstellar medium. Simulations show that while smooth, gas-free discs best preserve the spiral, turbulence from star formation can still support it. However, overly clumpy gas suppresses the pattern, making the spiral a sensitive probe of galactic structure and dynamics.
Searching for Patterns in the Distant Universe: A Kolmogorov Analysis of JWST Deep Survey Galaxies
N. Galikyan and collaborators used JWST galaxy spectra to study changes in galaxy properties over cosmic time using the Kolmogorov stochasticity parameter. They found a significant shift around redshift z≈2.7, suggesting a change in galaxy evolution or the intergalactic medium. Their results highlight new ways to trace the universe’s history.