Wilhelm, K.; Dammasch, I. E.; Marsch, E.; Hassler, D. M.: On the source regions of the fast solar wind in polar coronal holes. Astronomy and Astrophysics 353, pp. 749 - 756 (2000)
Wilhelm, K.; Lemaire, P.; Dammasch, I. E.; Hollandt, J.; Schühle, U.; Curdt, W.; Kucera, T.; Hassler, D. M.; Huber, M. C. E.: Solar irradiances of ultraviolet emission lines measured during the minimum of sunspot activity in 1996 and 1997. Physics and Chemistry of the Earth C, 25, pp. 389 - 392 (2000)
Wilhelm, K.; Schühle, U.; Curdt, W.; Dammasch, I. E.; Hollandt, J.; Lemaire, P.; Huber, M. C. E.: Solar spectroradiometry with the telescope and spectrograph SUMER on the Solar and Heliospheric Observatory SOHO. Metrologia 37, pp. 393 - 398 (2000)
Dammasch, I. E.; Hassler, D. M.; Curdt, W.; Wilhelm, K.: Statistical Analysis of EUV Lines Inside and Outside of Solar Coronal Holes. Space Science Reviews 87, pp. 161 - 164 (1999)
Dammasch, I. E.; Wilhelm, K.; Curdt, W.; Hassler, D. M.: The Ne VIII (λ770) resonance line: Solar wavelengths determined by SUMER on SOHO. Astronomy and Astrophysics 346, pp. 285 - 294 (1999)
Doschek, E. E.; Laming, J. M.; Doschek, G. A.; Feldman, U.; Wilhelm, K.: A comparison between measurements of solar EUV spectral line intensities emitted by C, N, O, and S ions and theoretical calculations. Astrophysical Journal 518, pp. 909 - 917 (1999)
Dwivedi, B. N.; Curdt, W.; Wilhelm, K.: Analysis of extreme-ultraviolet off-limb spectra obtained with SUMER/SOHO: Ne VI/MG VI emission lines. Astrophysical Journal 517, pp. 516 - 525 (1999)
Dwivedi, B. N.; Mohan, A.; Wilhelm, K.: A new Sun: Probing solar plasmas in the EUV light from SUMER on SOHO. Current Science 77, pp. 1521 - 1529 (1999)
Feldman, U.; Doschek, G. A.; Schühle, U.; Wilhelm, K.: Properties of quiet-sun coronal plasmas at distances of 1.03 lt;= RS lt;= 1.50 along the solar equatorial plane. Astrophysical Journal 518, pp. 500 - 507 (1999)
Hassler, D. M.; Dammasch, I. E.; Lemaire, P.; Brekke, P.; Curdt, W.; Mason, H. E.; Vial, J.-C.; Wilhelm, K.: Solar wind outflow and the chromospheric magnetic network. Science 283, pp. 810 - 813 (1999)
Lemaire, P.; Bocchialini, K.; Aletti, V.; Hassler, D.; Wilhelm, K.: Search for Signatures of a Coronal Hole in Transition Region Lines Near Disk Center. Space Science Reviews 87, pp. 249 - 252 (1999)
Marsch, E.; Tu, C.-Y.; Heinzel, P.; Wilhelm, K.; Curdt, W.: Proton and hydrogen temperatures at the base of the solar polar corona. Astronomy and Astrophysics 347, pp. 676 - 683 (1999)
Pinfield, D. J.; Keenan, F. P.; Mathioudakis, M.; Phillips, K. H. J.; Curdt, W.; Wilhelm, K.: Evidence for non-Maxwellian electron energy distributions in the solar transition region: Si III line ratios from SUMER. Astrophysical Journal 527, pp. 1000 - 1008 (1999)
Schühle, U.; Curdt, W.; Wilhelm, K.; Solanki, S. K.; Stucki, K.: Signatures of coronal hole spectra between 660 and 1460 Å measured with SUMER on SOHO. Space Science Reviews 87, pp. 299 - 302 (1999)
Schwenn, R.; Wilhelm, K.: Die wichtigsten Sonnenmissionen. Beobachtung der Sonne mit Satellitenteleskopen. Sterne unda Weltraum Special 4, p. 110 (1999)
First Light! The spectro-polarimeter of the world's largest solar telescope in Hawaii looks at the Sun for the first time. The instrument was developed in Germany.
Dr. Theodosios Chatzistergos receives award by the European Space Weather and Space Climate Association for his research findings on the historical activity of the Sun.
The Zdenĕk Švetska Senior Prize of the Solar Physics Division of the European Physical Society (EPS) recognizes Solanki’s pioneering contributions to solar research.
The magnetic field in the solar atmosphere exceeds the geomagnetic field strength by four orders of magnitude. It greatly influences the processes of energy transport within the solar atmosphere, and dominates the morphology of the solar chromosphere and corona. Kinetic energy from convective motions in the Sun can be efficiently stored in magnetic fields and subsequently released - to heat the solar corona to several million degrees or to blast off coronal mass ejections.
Application deadline 1 October 2024. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...