Chatzistergos, T.; Krivova, N. A.; Ermolli, I.: Understanding the secular variability of solar irradiance: the potential of Ca II K observations. Journal of Space Weather and Space Climate 14, p. 9 (2024)
Clette, F.; Lefèvre, L.; Chatzistergos, T.; Hayakawa, H.; Carrasco, V. M. S.; Arlt, R.; Cliver, E. W.; Dudok de Wit, T.; Friedli, T. K.; Karachik, N.et al.; Kopp, G.; Lockwood, M.; Mathieu, S.; Muñoz-Jaramillo, A.; Owens, M.; Pesnell, D.; Pevtsov, A.; Svalgaard, L.; Usoskin, I. G.; van Driel-Gesztelyi, L.; Vaquero, J. M.: Recalibration of the Sunspot-Number: Status Report. Solar Physics 298, 44 (2023)
Murabito, M.; Ermolli, I.; Chatzistergos, T.; Jafarzadeh, S.; Giorgi, F.; Rouppe van der Voort, L.: Investigating the Effect of Solar Ambient and Data Characteristics on Ca II K Observations and Line Profile Measurements. The Astrophysical Journal 947, p. 18 (2023)
Chatzistergos, T.; Ermolli, I.; Krivova, N. A.; Barata, T.; Carvalho, S.; Malherbe, J.-M.: Scrutinising the relationship between plage areas and sunspot areas and numbers. Astronomy and Astrophysics 667, p. A167 (2022)
Chatzistergos, T.; Krivova, N.; Ermolli, I.: Full-disc Ca II K observations-A window to past solar magnetism. FRONTIERS IN ASTRONOMY AND SPACE SCIENCES (2022)
Ermolli, I.; Giorgi, F.; Chatzistergos, T.: Rome Precision Solar Photometric Telescope: precision solar full-disk photometry during solar cycles 23-25. FRONTIERS IN ASTRONOMY AND SPACE SCIENCES (2022)
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.; Krivova, N. A.; Ermolli, I.; Yeo, K. L.; Mandal, S.; Solanki, S. K.; Kopp, G.; Malherbe, J.-M.: Reconstructing solar irradiance from historical Ca II K observations: I. Method and its validation. Astronomy and Astrophysics 656, A104 (2021)
Chatzistergos, T.; Ermolli, I.; Giorgi, F.; Krivova, N. A.; Puiu, C.C.: Modelling solar irradiance from ground-based photometric observations. Journal of Space Weather and Space Climate 10, 45 (2020)
Chatzistergos, T.; Ermolli, I.; Krivova, N. A.; Solanki, S. K.: Historical solar Ca II K observations at the Kyoto and Sacramento Peak observatories. Journal of Physics: Conference Series 1548 (1), 012007 (2020)
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)
Application deadline 1 October 2024. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...
Two scientific associations have awarded Prof. Dr. Thorsten Kleine the title "Geochemistry Fellow" for his contributions to the understanding of how the Solar System was formed.
Call for applications: PhD positions in planetary science, solar physics, stellar physics, with a starting date in September 2024, at the IMPRS in Göttingen.
Application deadline 1 October 2023. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...
The MPS instruments on board ESA’s JUICE spacecraft have successfully completed their commissioning in space - and delivered their first observational data.