Publications of Theodosios Chatzistergos

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.: Is there a link between the length of the solar cycle and Earth's temperature? Rendiconti Lincei. Scienze Fisiche e Naturali (2022)

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)

Asvestari, E.; Pomoell, J.; Kilpua, E.; Good, S.; Chatzistergos, T.; Temmer, M.; Palmerio, E.; Poedts, S.; Magdalenic, J.: Modelling a multi-spacecraft coronal mass ejection encounter with EUHFORIA. Astronomy and Astrophysics 652, A27 (2021)

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)

Sowmya, K.; Shapiro, A.; Witzke, V.; Nèmec, N.-E.; Chatzistergos, T.; Yeo, K. L.; Krivova, N. A.; Solanki, S. K.: Modeling Stellar Ca ii H and K Emission Variations. I. Effect of Inclination on the S-index. The Astrophysical Journal 914 (1), 21 (2021)

Sowmya, K.; Shapiro, A. I.; Witzke, V.; Nemec, N.-E.; Chatzistergos, T.; Yeo, K. L.; Krivova, N. A.; Solanki, S. K.: Modeling Stellar Ca II H and K Emission Variations. I. Effect of Inclination on the S-index. The Astrophysical Journal 914, p. 21 (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.; Giorgi, F.; Yeo, K. L.: Recovering the unsigned photospheric magnetic field from Ca II K observations. Astronomy and Astrophysics 626, A114 (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)