Hölken, Johannes
Main Focus
I am interested in enhancing the understanding of physics in the lower solar atmosphere, particularly the smallest scale magnetic fields and flows. Suitable observational data is currently still very rare and I am hence not only involved in the data analysis and interpretation but also in the creation and improvements of numerical tools (such as data reduction, image reconstruction, and inversion approaches) and instruments.
Curriculum Vitae
Selected Publications
J. Hölken, D. Przybylski, M. van Noort, D. Cameron, S. K. Solanki, H.P. Doerr, W. Cao, N. Gorceix, J. Kang, K. Ahn,
and J. Chae: "On the magneto-convective nature of dark striations and moving bright grains at the edge of pores",
2026, A&A, 708, A135 (doi: 10.1051/0004-6361/202659037)
J. Hölken, M. van Noort, S. K. Solanki, A. Feller, H.P. Doerr, W. Cao, N. Gorceix, J. Kang, K. Ahn, and J. Chae: "Towards
solar many line inversion of high resolution spectro-polarimetric data", 2026, A&A, 705, A220
(doi: 10.1051/0004-6361/202556890)
M. van Noort, J. Hölken, H.P. Doerr, W. Cao, N. Gorceix, J. Kang, K. Ahn, J. Chae and S. K. Solanki: "Large aperture
diffraction limited spectro-polarimetry with FISS-SP", 2025, A&A, 704, A215 (doi: 10.1051/0004-6361/202556041)
J. Hölken, H.P. Doerr, A. Feller , F.A. Iglesias: "Spectroflat: A generic spectrum and flat-field calibration library for
spectro-polarimetric data", 2024, A&A, 687, A22 (doi: 10.1051/0004-6361/202348877)