5 papers
Linear toroidal-inertial waves on a differentially rotating sphere with application to helioseismology: Modeling, forward and inverse problems
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon +1
This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on…
Traction force microscopy for linear and nonlinear elastic materials as a parameter identification inverse problem
Gesa Sarnighausen, Tram Thi Ngoc Nguyen, Thorsten Hohage +5
Traction force microscopy is a method widely used in biophysics and cell biology to determine forces that biological cells apply to their environment. In the experiment, the cells…
Inferring solar differential rotation and viscosity via passive imaging with inertial waves
Tram Thi Ngoc Nguyen, Thorsten Hohage, Damien Fournier +1
The recent discovery of inertial waves on the surface of the Sun offers new possibilities to learn about the solar interior. These waves are long-lived with a period on the order o…
Learned infinite elements for helioseismology -- Learning transparent boundary conditions for the solar atmosphere
Damien Fournier, Janosch Preuss, Thorsten Hohage +1
Context. Acoustic waves in the Sun are affected by the atmospheric layers, but this region is often ignored in forward models due to the increase in computational cost. Aims. The p…
Quantitative passive imaging by iterative holography: The example of helioseismic holography
Björn Müller, Thorsten Hohage, Damien Fournier +1
In passive imaging, one attempts to reconstruct some coefficients in a wave equation from correlations of observed randomly excited solutions to this wave equation. Many methods pr…