Author: Vincent BöningWe present the current status of an undergoing validation of a recently developed model for computing spherical Born approximation sensitivity functions for flows. In a first step, power spectra and reference cross-correlations fr ... more
Author: Nobumitsu YokoiTurbulent helicity (velocity–vorticity correlation) represents breaking mirror-symmetry in turbulence. With the aid of an analytical statistical theory for inhomogeneous turbulence, an expression of the Reynolds stress in non-mi ... more
Author: Simon CandelaresiMagnetic helicity is a conserved quantity under an ideal evolution.
Here we present methods for simulating such topology conserving systems.
We make use of Lagrangian grids and mimetic differential operators.
It is shown that t ... more
Author: Manuel ColladosEST will be the largest solar telescope ever built in Europe. With a 4-metre primary mirror and state-of-the-art technology, it will furnish astronomers with a unique tool to understand the Sun. The main goal of EST is to investig ... more
Author: Andre GieseckeI present results on kinematic dynsamo models driven by an axisymmetric large scale flow
impacted by periodic perturbations due to azimuthally propagating vortices.
I found a strong impact on growth rates and frequencies with r ... more
Author: Lyndsay FletcherThe European Solar Telescope offers unique and novel opportunities for solving some of the long-standing problems related to solar flares, such as the slow evolution of the stored energy preceding the flare, the rapid deposition ... more
Author: Sanjay gosainSOLIS stands for Synoptic Optical Long-term Investigations of the Sun. Daily fulldisk magnetic
fields measurements of the Sun are being done for several decades at NSO Kittpeak. The
SOLIS/VSM instrument replaced earlier instrume ... more
Author: Manuela TemmerThe unusually large NOAA active region (AR) 2192, observed in October and November 2014, was outstanding in its productivity of major flares (GOES class M5 and larger). However, none of the X-flares was associated to a coronal mas ... more
Author: Frank HillGONG (Global Oscillation Network Group) is now 20 years old and continues to reliably provide data for the international helioseismology community. In addition the role of GONG has expanded to provide data as input to a number of ... more