Publications of T. Chatzistergos ordered by citations

A list of publications authored or co-authored by T. Chatzistergos, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0002-0335-9831

81	New reconstruction of the sunspot group numbers since 1739 using direct calibration and "backbone" methods Chatzistergos, Theodosios, Usoskin, Ilya G., Kovaltsov, Gennady A., Krivova, Natalie A. & Solanki, Sami K., 2017, A&A, 602, A69
70	Recalibration of the Sunspot-Number: Status Report 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., 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., 2023, Solar Physics, 298, 44
52	Analysis of full disc Ca II K spectroheliograms. II. Towards an accurate assessment of long-term variations in plage areas Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A. & Solanki, Sami K., 2019, A&A, 625, A69
50	Analysis of full-disc Ca II K spectroheliograms. III. Plage area composite series covering 1892-2019 Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A., Solanki, Sami K., Banerjee, Dipankar, Barata, Teresa, Belik, Marcel, Gafeira, Ricardo, Garcia, Adriana, Hanaoka, Yoichiro, Hegde, Manjunath, Klimeš, Jan, Korokhin, Viktor V., Lourenço, Ana, Malherbe, Jean-Marie, Marchenko, Gennady P., Peixinho, Nuno, Sakurai, Takashi & Tlatov, Andrey G., 2020, A&A, 639, A88
40	Recovering the unsigned photospheric magnetic field from Ca II K observations Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K., Krivova, Natalie A., Giorgi, Fabrizio & Yeo, Kok Leng, 2019, A&A, 626, A114
39	Analysis of full disc Ca II K spectroheliograms. I. Photometric calibration and centre-to-limb variation compensation Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K. & Krivova, Natalie A., 2018, A&A, 609, A92
33	Modelling a multi-spacecraft coronal mass ejection encounter with EUHFORIA Asvestari, E., Pomoell, J., Kilpua, E., Good, S., Chatzistergos, T., Temmer, M., Palmerio, E., Poedts, S. & Magdalenic, J., 2021, A&A, 652, A27
29	Long-term changes in solar activity and irradiance Chatzistergos, Theodosios, Krivova, Natalie A. & Yeo, Kok Leng, 2023, Journal of Atmospheric and Solar-Terrestrial Physics, 252, 106150
27	Full-disc Ca ii K observations—A window to past solar magnetism Chatzistergos, Theodosios, Krivova, Natalie A. & Ermolli, Ilaria, 2022, Frontiers in Astronomy and Space Sciences, 9, 336
27	Reconstructing solar irradiance from historical Ca II K observations. I. Method and its validation Chatzistergos, Theodosios, Krivova, Natalie A., Ermolli, Ilaria, Yeo, Kok Leng, Mandal, Sudip, Solanki, Sami K., Kopp, Greg & Malherbe, Jean-Marie, 2021, A&A, 656, A104
23	Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers Usoskin, I. G., Kovaltsov, G. A. & Chatzistergos, T., 2016, Solar Physics, 291, 3793
23	Modelling solar irradiance from ground-based photometric observations Chatzistergos, Theodosios, Ermolli, Ilaria, Giorgi, Fabrizio, Krivova, Natalie A. & Puiu, Cosmin Constantin, 2020, Journal of Space Weather and Space Climate, 10, 45
23	Delving into the Historical Ca II K Archive from the Kodaikanal Observatory: The Potential of the Most Recent Digitized Series Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K., Krivova, Natalie A., Banerjee, Dipankar, Jha, Bibhuti K. & Chatterjee, Subhamoy, 2019, Solar Physics, 294, 145
22	Scrutinising the relationship between plage areas and sunspot areas and numbers Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A., Barata, Teresa, Carvalho, Sara & Malherbe, Jean-Marie, 2022, A&A, 667, A167
21	Modeling Stellar Ca II H and K Emission Variations. I. Effect of Inclination on the S-index Sowmya, K., Shapiro, A. I., Witzke, V., Nèmec, N.-E., Chatzistergos, T., Yeo, K. L., Krivova, N. A. & Solanki, S. K., 2021, ApJ, 914, 21
17	Differential Rotation of the Solar Chromosphere: A Century-long Perspective from Kodaikanal Solar Observatory Ca II K Data Mishra, Dibya Kirti, Routh, Srinjana, Jha, Bibhuti Kumar, Chatzistergos, Theodosios, Basu, Judhajeet, Chatterjee, Subhamoy, Banerjee, Dipankar & Ermolli, Ilaria, 2024, ApJ, 961, 40
16	The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays Hayakawa, Hisashi, Cliver, Edward W., Clette, Frédéric, Ebihara, Yusuke, Toriumi, Shin, Ermolli, Ilaria, Chatzistergos, Theodosios, Hattori, Kentaro, Knipp, Delores J., Blake, Séan P., Cauzzi, Gianna, Reardon, Kevin, Bourdin, Philippe-A., Just, Dorothea, Vokhmyanin, Mikhail, Matsumoto, Keitaro, Miyoshi, Yoshizumi, Ribeiro, José R., Correia, Ana P., Willis, David M., Wild, Matthew N. & Silverman, Sam M., 2023, ApJ, 959, 23
15	Exploiting Four Historical Ca II K Spectroheliogram Archives Chatzistergos, T., Ermolli, I., Solanki, S. K. & Krivova, N. A., 2016, Coimbra Solar Physics Meeting: Ground-based Solar Observations in the Space Instrumentation Era (Editors: Dorotovic, I., Fischer, C. E. & Temmer, M.), Astronomical Society of the Pacific Conference Series, 504, p. 227
14	A note on the sunspot and prominence records made by Angelo Secchi during the period 1871-1875 Carrasco, Víctor M. S., Nogales, José M., Vaquero, José M., Chatzistergos, Theodosios & Ermolli, Ilaria, 2021, Journal of Space Weather and Space Climate, 11, 51
14	Understanding the secular variability of solar irradiance: the potential of Ca II K observations Chatzistergos, Theodosios, Krivova, Natalie A. & Ermolli, Ilaria, 2024, Journal of Space Weather and Space Climate, 14, 9
14	Ca II K spectroheliograms for studies of long-term changes in solar irradiance Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A. & Solanki, Sami K., 2018, Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles (Editors: Banerjee, D., Jiang, J., Kusano, K. & Solanki, S.), IAU Symposium, 340, p. 125
14	Historical solar Ca II K observations at the Rome and Catania observatories Chatzistergos, T., Ermolli, I., Falco, M., Giorgi, F., Guglielmino, S. L., Krivova, N. A., Romano, P. & Solanki, S. K., 2019, Nuovo Cimento C Geophysics Space Physics C, 42, 5
13	Rome Precision Solar Photometric Telescope: precision solar full-disk photometry during solar cycles 23–25 Ermolli, Ilaria, Giorgi, Fabrizio & Chatzistergos, Theodosios, 2022, Frontiers in Astronomy and Space Sciences, 9, 352
13	The potential of Ca II K observations for solar activity and variability studies Ermolli, Ilaria, Chatzistergos, Theodosios, Krivova, Natalie A. & Solanki, Sami K., 2018, Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles (Editors: Banerjee, D., Jiang, J., Kusano, K. & Solanki, S.), IAU Symposium, 340, p. 115
11	Solar Observations by Angelo Secchi. I. Digitization of Original Documents and Analysis of Group Numbers over the Period of 1853-1878 Ermolli, I., Chatzistergos, T., Giorgi, F., Carrasco, V. M. S., Aparicio, A. J. P. & Chinnici, I., 2023, ApJS, 269, 53
11	Analysis of full-disc Hα observations: Carrington maps and filament properties in 1909-2022 Chatzistergos, Theodosios, Ermolli, Ilaria, Banerjee, Dipankar, Barata, Teresa, Chouinavas, Ioannis, Falco, Mariachiara, Gafeira, Ricardo, Giorgi, Fabrizio, Hanaoka, Yoichiro, Krivova, Natalie A., Korokhin, Viktor V., Lourenço, Ana, Marchenko, Gennady P., Malherbe, Jean-Marie, Peixinho, Nuno, Romano, Paolo & Sakurai, Takashi, 2023, A&A, 680, A15
10	Historical solar Ca II K observations at the Kyoto and Sacramento Peak observatories Chatzistergos, T., Ermolli, I., Krivova, N. A. & Solanki, S. K., 2020, Journal of Physics Conference Series, Journal of Physics Conference Series, 1548, p. 012007
9	A Discussion of Implausible Total Solar-Irradiance Variations Since 1700 Chatzistergos, Theodosios, 2024, Solar Physics, 299, 21
9	Is there a link between the length of the solar cycle and Earth's temperature? Chatzistergos, Theodosios, 2023, Rendiconti Lincei. Scienze Fisiche e Naturali, 34, 11
7	Investigating the Effect of Solar Ambient and Data Characteristics on Ca II K Observations and Line Profile Measurements Murabito, M., Ermolli, I., Chatzistergos, T., Jafarzadeh, S., Giorgi, F. & Rouppe van der Voort, L., 2023, ApJ, 947, 18
7	Structure and Dynamics of the Sun's Interior Revealed by the Helioseismic and Magnetic Imager Kosovichev, Alexander G., Basu, Sarbani, Bekki, Yuto, Buitrago-Casas, Juan Camilo, Chatzistergos, Theodosios, Chen, Ruizhu, Christensen-Dalsgaard, Jørgen, Donea, Alina, Fleck, Bernhard, Fournier, Damien, García, Rafael A., Getling, Alexander V., Gizon, Laurent, Gough, Douglas O., Hanasoge, Shravan, Hanson, Chris S., Hess Webber, Shea A., Hoeksema, J. Todd, Howe, Rachel, Jain, Kiran, Kasapis, Spiridon, Kashyap, Samarth G., Kitiashvili, Irina N., Komm, Rudolf, Korzennik, Sylvain G., Krivova, Natalie A., Kuhn, Jeffrey R., Liang, Zhi-Chao, Lindsey, Charles, Mahajan, Sushant S., Mandal, Krishnendu, Mani, Prasad, Martinez Oliveros, Juan Carlos, Mathur, Savita, Rabello Soares, M. Cristina, Rajaguru, S. Paul, Reiter, Johann, Rhodes, Edward J., Rozelot, Jean-Pierre, Scherrer, Philip H., Solanki, Sami K., Stefan, John T., Toomre, Juri, Tripathy, Sushanta C., Upton, Lisa A. & Zhao, Junwei, 2025, Solar Physics, 300, 70
7	Rudolf Wolf to Alfred Wolfer: The Transfer of the Reference Observer in the International Sunspot Number Series (1876–1893) Bhattacharya, S., Lefèvre, L., Chatzistergos, T., Hayakawa, H. & Jansen, M., 2024, Solar Physics, 299, 45
7	Understanding Solar Activity after the Maunder Minimum: Sunspot Records by Rost and Alischer Carrasco, V. M. S., Aparicio, A. J. P., Chatzistergos, T., Jamali Jaghdani, S., Hayakawa, H., Gallego, M. C. & Vaquero, J. M., 2024, ApJ, 968, 65
6	Sunspot cycles for the first millennium BC reconstructed from radiocarbon Usoskin, I., Chatzistergos, T., Solanki, S. K., Krivova, N., Kovaltsov, G., Brehm, N., Christl, M. & Wacker, L., 2025, A&A, 698, A182
4	Ca II K Polar Network Index of the Sun: A Proxy for Historical Polar Magnetic Field Mishra, Dibya Kirti, Jha, Bibhuti Kumar, Chatzistergos, Theodosios, Ermolli, Ilaria, Banerjee, Dipankar, Upton, Lisa A. & Khan, M. Saleem, 2025, ApJ, 982, 78
4	Butterfly Diagram and Other Properties of Plage Areas from Kodaikanal Ca II K Photographs Covering 1904 – 2007 Jha, Bibhuti Kumar, Chatzistergos, Theodosios, Banerjee, Dipankar, Ermolli, Ilaria, Krivova, Natalie A., Solanki, Sami K. & Priyadarshi, Aditya, 2024, Solar Physics, 299, 166
2	Assessment of sunspot number cross-calibration approaches Chatzistergos, Theodosios, Krivova, Natalie A., Sundermann, Hannah & Usoskin, Ilya G., 2025, A&A, 699, A157
2	Detectability of Solar Rotation Period across Various Wavelengths Vasilyev, Valeriy, Reinhold, Timo, Shapiro, Alexander I., Chatzistergos, Theodosios, Krivova, Natalie & Solanki, Sami K., 2025, ApJ, 980, L32
2	Revisiting the SATIRE-S irradiance reconstruction: Heritage of Mt Wilson magnetograms and Ca II K observations Chatzistergos, Theodosios, Krivova, Natalie A., Solanki, Sami K. & Leng Yeo, Kok, 2025, A&A, 696, A204
1	Solar Variability in the Mg II h and k Lines Sowmya, K., Snow, M., Shapiro, A. I., Krivova, N. A., Chatzistergos, T. & Solanki, S. K., 2025, ApJ, 980, 173
0	Modelling Solar Ca II H&K Emission Variations Krishnamurthy, Sowmya, Shapiro, Alexander I., Witzke, Veronika, Nèmec, Nina-E., Chatzistergos, Theodosis, Yeo, Kok Leng, Krivova, Natalie A. & Solanki, Sami K., 2021, The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, p. 154