Carrasco, V. M. S.; Nogales, J. M.; Vaquero, J. M.; Chatzistergos, T.; Ermolli, I.: A note on the sunspot and prominence records made by Angelo Secchi during the period 1871–1875. Journal of Space Weather and Space Climate 11, 51 (2021)
Chatzistergos, T.; Ermolli, I.; Krivova, N. A.; Solanki, S. K.; Banerjee, D.; Barata, T.; Belik, M.; Gafeira, R.; Garcia, A.; Hanaoka, Y.et al.; Hegde, M.; Klimeš, J.; Korokhin, V. V.; Lourenço, A.; Malherbe, J.-M.; Marchenko, G. P.; Peixinho, N.; Sakurai, T.; Tlatov, A. G.: Analysis of full-disc Ca II K spectroheliograms III. Plage area composite series covering 1892–2019. Astronomy and Astrophysics 639, A88 (2020)
Chatzistergos, T.; Ermolli, I.; Falco, M.; Giorgi, F.; Guglielmino, S. L.; Krivova, N. A.; Romano, P.; Solanki, S. K.: Historical solar Ca II K observations at the Rome and Catania observatories. Nuovo Cimento della Societa Italiana di Fisica C-Geophysics and Space Physics 42 (1), 5 (2019)
Chatzistergos, T.; Ermolli, I.; Krivova, N. A.; Solanki, S. K.: Analysis of full disc Ca II K spectroheliograms: II. Towards an accurate assessment of long-term variations in plage areas. Astronomy and Astrophysics 625, A69 (2019)
Chatzistergos, T.; Ermolli, I.; Solanki, S. K.; Krivova, N. A.; Banerjee, D.; Jha, B. K.; Chatterjee, S.: Delving into the Historical Ca ii K Archive from the Kodaikanal Observatory: The Potential of the Most Recent Digitized Series. Solar Physics 294 (10), 145 (2019)
Chatzistergos, T.; Ermolli, I.; Solanki, S. K.; Krivova, N. A.: Analysis of full disc Ca II K spectroheliograms: I. Photometric calibration and centre-to-limb variation compensation. Astronomy and Astrophysics 609, A92 (2018)
Chatzistergos, T.; Usoskin, I. G.; Kovaltsov, G. A.; Krivova, N. A.; Solanki, S. K.: New reconstruction of the sunspot group numbers since 1739 using the direct calibration and “backbone” methods. Astronomy and Astrophysics 602, A69 (2017)
Usoskin, I. G.; Kovaltsov, G. A.; Chatzistergos, T.: Dependence of the sunspot-group size on the level of solar activity and its influence on the calibration of solar observers. Solar Physics 291, pp. 3793 - 3805 (2016)
Chatzistergos, T.; Ermolli, I.; Solanki, S. K.; Krivova, N. A.: The potential of historical spectroheliograms for Sun-climate studies. 9th IAGA - ICMA/IAMAS - ROSMIC/VarSITI/SCOSTEP workshop on long-term changes and trends in the atmosphere, Kühlungsborn, Germany (2016)
The Solar Lower Atmosphere and Magnetism (SLAM) group covers many exciting subjects in solar physics, focussing on the development and testing of highly novel solar instrumentation, reduction and analysis of highest quality solar observations, or improving and developing advanced techniques for the analysis of solar observations.
Inversion codes are used to aid the detailed interpretation of solar spectro-polarimetric data. This computer code attempts to find the atmospheric structure that produced an observed spectrum by minimizing the difference between the observed spectrum and a Stokes spectrum.
The MPS is one of the leading institutes worldwide in building instruments for solar research, both for ground based observatories as well as for balloon and space-borne missions. Scientists and engineers of MPS conceive new observing methods and develop novel instruments of highest technological complexity. These instruments are built in house, tested, calibrated, and used at the best solar observatories in the world, or delivered to NASA and ESA to be launched to space.
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.
Recently new, very sensitive observations of the ExoMars Trace Gas Orbiter (TGO) and its instruments NOMAD (Nadir and Occultation for MArs Discovery) an ACS (Atmospheric Chemistry Suite) became available and initiated a number of interesting scientific questions. Some of them are open PhD projects using the MPS General Circulation Model (MPS-GCM).