Borrero, J. M.; Solanki, S. K.; Bellot Rubio, L. R.; Lagg, A.; Mathew, S. K.: On the fine structure of sunspot penumbrae - I. A quantitative comparison of two semiempirical models with implications for the Evershed effect. Astronomy and Astrophysics 422, pp. 1093 - 1104 (2004)
Bruls, J. H. M. J.; Solanki, S. K.: Apparent solar radius variations - The influence of magnetic network and plage. Astronomy and Astrophysics 427 (2), pp. 735 - 743 (2004)
Krivov, A. V.; Krivova, N. A.; Solanki, S. K.; Titov, V. B.: Towards understanding the β Pictoris dust stream. Astronomy and Astrophysics 417, pp. 341 - 352 (2004)
Krivova, N. A.; Solanki, S. K.: Effect of spatial resolution on estimating the Sun's magnetic flux. Astronomy and Astrophysics 417, pp. 1125 - 1132 (2004)
Krivova, N. A.; Solanki, S. K.: Solar variability and global warming: A statistical comparison since 1850. Advances in Space Research 34, pp. 361 - 364 (2004)
Lagg, A.; Woch, J.; Krupp, N.; Solanki, S. K.: Retrieval of the full magnetic vector with the He I multiplet at 1083 nm. Maps of an emerging flux region. Astronomy and Astrophysics 414, pp. 1109 - 1120 (2004)
Loukitcheva, M.; Solanki, S. K.; Carlsson, M.; Stein, R. F.: Millimeter observations and chromospheric dynamics. Astronomy and Astrophysics 419, pp. 747 - 756 (2004)
Mathew, S. K.; Solanki, S. K.; Lagg, A.; Collados, M.; Borrero, J. M.; Berdyugina, S.: Thermal-magnetic relation in a sunspot and a map of its Wilson depression. Astronomy and Astrophysics 422, pp. 693 - 701 (2004)
Ning, Z.; Innes, D. E.; Solanki, S. K.: Line profile characteristics of solar explosive event bursts. Astronomy and Astrophysics 419, pp. 1141 - 1148 (2004)
Preuss, O.; Haugan, M. P.; Solanki, S. K.; Jordan, S.: An astronomical search for evidence of new physics: Limits on gravity-induced birefringence from the magnetic white dwarf RE J0317-853. Physical Review D 70 (6), 067101 (2004)
Preuss, O.; Schüssler, M.; Holzwarth, V.; Solanki, S. K.: Distribution of magnetically confined circumstellar matter in oblique rotators. Astronomy and Astrophysics 417, pp. 987 - 992 (2004)
Raouafi, N.-E.; Mancuso, S.; Solanki, S. K.; Inhester, B.; Mierla, M.; Stenborg, G.; Delaboudiniere, J. P.; Benna, C.: Shock wave driven by an expanding system of loops. Astronomy and Astrophysics 424 (3), pp. 1039 - 1048 (2004)
Raouafi, N.-E.; Solanki, S. K.: Effect of the electron density stratification on off-limb OVI line profiles: How large is the velocity distribution anisotropy in the solar corona? Astronomy and Astrophysics 427 (2), pp. 725 - 733 (2004)
Shelyag, S.; Schüssler, M.; Solanki, S. K.; Berdyugina, S.; Vögler, A.: G-band spectral synthesis and diagnostics of simulated solar magneto-convection. Astronomy and Astrophysics 427, pp. 335 - 343 (2004)
Solanki, S. K.; Preuss, O.; Haugan, M.; Gandorfer, A.; Povel, H. P.; Steiner, P.; Stucki, K.; Bernasconi, P. N.; Soltau, D.: Solar constraints on new couplings between electromagnetism and gravity. Physical Review D 69, 062001 (2004)
Solanki, S. K.; Usoskin, I. G.; Kromer, B.; Schüssler, M.; Beer, J.: Unusual activity of the Sun during recent decades compared to the previous 11,000 years. Nature 431 (7012), pp. 1084 - 1087 (2004)
The European Space Agency (ESA) has given the green light to build the flight models of the spacecraft and science payload for the PLATO mission to search for extrasolar planets.
In the "Solar and Stellar Interiors" department, Laurent Gizon, Jesper Schou, Aaron Birch, Robert Cameron and others offer PhD projects in solar physics and astrophysics. Helioseismology and asteroseismology are used as important tools to study the oscillating Sun and stars.
The longest-serving solar observatory in space has turned 25 and is still making significant contributions to solar research. Its old age has become an important merit.