We present data recently obtained with NOEMA/PolyFiX on the MS-type Asymptotic Giant Branch (AGB) star RS Cnc, allowing to characterize in detail structure of its wind. These results became possible by recent advances NOEMA observatory, which combine large spectral bandwidth high sensitivity together still increasing spatial resolution.

We present full-Maxwell topology-optimization design of a single-piece multlayer metalens, about 10 wavelengths~$\lambda$ in thickness, that simultaneously focuses over $60^\circ$ angular range and 23\% spectral bandwidth without suffering chromatic or aberration, "plan-achromat." At all angles frequencies it achieves diffraction-limited focusing (Strehl ratio $> 0.8$) absolute efficiency 50$\%...

We extend the validity of Dain’s angular-momentum inequality to maximal, asymptotically flat, initial data sets on a simply connected manifold with several asymptotically flat ends which are invariant under a U(1) action and which admit a twist potential.

Using an analogy with an Ising-like spin model, we define microcanonical measures for the dynamics of three dimensional (3D) axisymmetric turbulent flow in a Taylor-Couette geometry. We compute the relevant physical quantities and argue that axisymmetry induces a large scale organization in turbulent flows. We show that there exists a low energy, low temperature regime, for which the orthoradia...

Local regularity of axially symmetric solutions to the NavierStokes equations is studied. It is shown that under certain natural assumptions there are no singularities of Type I. 1991 Mathematical subject classification (Amer. Math. Soc.): 35K, 76D.

We present a partial solution to the problem of opti mal feedback reorientation of the symmetry axis of an axially symmetric rigid body The performance index is quadratic in the state and the control vari able and the optimal reorientation maneuver requires the use of only two control torques Because of the passivity characteristics and the cascade structure of the system we rst state two optim...

In this paper, we study the dynamic stability of the 3D axisymmetric NavierStokes Equations with swirl. To this purpose, we propose a new one-dimensional (1D) model which approximates the Navier-Stokes equations along the symmetry axis. An important property of this 1D model is that one can construct from its solutions a family of exact solutions of the 3D Navier-Stokes equations. The nonlinear...