Manuscripts Under Review
Stepanyuk, Oleg; Kozarev, Kamen. “Segmentation and Tracking of Eruptive Solar Phenomena with Convolutional Neural Networks” – to Journal of Geophysical Research: Machine Learning and Computation (preprint)
Kozarev, Kamen; Nedal, Mohamed. “Modeling Metric Gyrosynchrotron Radio Emission From the Quiet Solar Corona” – to Bulgarian Astronomical Journal (preprint)
Zucca, Pietro; Zhang, Peijin; Kozarev, Kamen; Nedal, Mohamed; Mancini, Mattia; Kumari, Anshu; Morosan, Diana; Dabrowski, Marcin; Gallagher, Peter; Krankowski, Andrzej; Vocks, Christian. “Source location and evolution of a multi-lane type II radio burst” – to Astronomy and Astrophysics (preprint)
Refereed Publications
Stepanyuk, Oleg; Kozarev, Kamen. “Multi-Instrument Observations and Tracking of a Coronal Mass Ejection Front From Low to Middle Corona”, Journal of Space Weather and Space Climate, February 2024, Volume 14, id.2, 15 pp., https://doi.org/10.1051/swsc/2023033
Nedal, Mohamed; Kozarev, Kamen; Zhang, Peijin; Zucca, Pietro. “Coronal Diagnostics of Solar Type-III Radio Bursts Using LOFAR and PSP Observations”, Astronomy & Astrophysics, December 2023, Volume 680, id.A106, 14 pp., https://doi.org/10.1051/0004-6361/202347041
Nedal, Mohamed; Kozarev, Kamen; Arsenov, Nestor; Zhang, Peijin. “Forecasting Solar Energetic Proton Integral Fluxes with Bi-Directional Long Short-Term Memory Neural Networks”, Journal of Space Weather and Space Climate, September 2023, Volume 13, id.26, 21 pp., https://doi.org/10.1051/swsc/2023026
Nedal, Mohamed ; Kozarev, Kamen ; Miteva, Rositsa ; Stepanyuk, Oleg; Dechev, Momchil. “Characterization of the Early Dynamics of Solar Coronal Bright Fronts”, Bulgarian Astronomical Journal, Vol. 41, p. 63, https://astro.bas.bg/AIJ/issues/n41/MNedal.pdf
Rigney, J.; Gallagher, P. T.; Ramsay, G. ; Doyle, J. G. ; Long, D. M.; Stepanyuk, O. ; Kozarev, K. “Tracking the motion of a shock along a channel in the low solar corona”. Astronomy & Astrophysics, April 2024, Volume 684, id.L7, 6 pp., https://doi.org/10.1051/0004-6361/202348452
Minta, F. N.; Nozawa, S.; Kozarev, K.; Elsaid, A ; Mahrous, A. “Forecasting the transit times of earth-directed halo CMEs using artificial neural network: A case study application with GCS forward-modeling technique”. Journal of Atmospheric and Solar-Terrestrial Physics, June 2023, Volume 247, article id. 106080., https://doi.org/10.1016/j.jastp.2023.106080
Miteva, R., Nedal, M., Veronig, A., Poetzi, W. “Parameter Study of Geoeffective Active Regions.” Atmosphere, 15, 8, MDPI, 2024, 930., https://doi.org/10.3390/atmos15080930
Minta, F. N., Nozawa, S. I., Kozarev, K., Elsaid, A., & Mahrous, A. (2023), Solar radio bursts observations by Egypt- Alexandria CALLISTO spectrometer: First results. Advances in Space Research, 72, 844. doi:10.1016/j.asr.2022.06.054.
Minta, F. N., Nozawa, S. I., Kozarev, K., Elsaid, A., & Mahrous, A. (2023), Assessing the spectral characteristics of band splitting type II radio bursts observed by CALLISTO spectrometers. Advances in Space Research, 72, 816. doi:10.1016/j.asr.2022.03.029.
Minta, F. N., Nozawa, S., Kozarev, K., Elsaid, A., & Mahrous, A. (2023), Forecasting the transit times of earth-directed halo CMEs using artificial neural network: A case study application with GCS forward-modeling technique. Journal of Atmospheric and Solar-Terrestrial Physics, 247, 106080. doi:10.1016/j.jastp.2023.106080.
Miteva, Rositsa; Nedal, Mohamed; Samwel, Susan W.; Temmer, Manuela. “Parameter Study of Geomagnetic Storms and Associated Phenomena: CME Speed De-Projection vs. In Situ Data”, Universe 2023, 9(4), 179; https://doi.org/10.3390/universe9040179
Zhang, P., Offringa, A. R., Zucca, P., Kozarev, K., & Mancini, M. (2023), RFI flagging in solar and space weather low frequency radio observations. Monthly Notices of the Royal Astronomical Society, 521, 630. doi:10.1093/mnras/stad491.
Whitman, Kathryn et al. “Review of solar energetic particle models”, Advances in Space Research, 2022, 08, 006, https://doi.org/10.1016/j.asr.2022.08.006
Zhang, P., Zucca, P., Kozarev, K., Carley, E., Wang, C., Franzen, T., Dabrowski, B., Krankowski, A., Magdalenic, J., & Vocks, C. (2022), Imaging of the Quiet Sun in the Frequency Range of 20-80 MHz. The Astrophysical Journal, 932, 17. doi:10.3847/1538-4357/ac6b37.
Stepanyuk, O., Kozarev, K., & Nedal, M. (2022), Multi-scale image preprocessing and feature tracking for remote CME characterization. Journal of Space Weather and Space Climate, 12, 20. doi:10.1051/swsc/2022020.
Kozarev, K., Nedal, M., Miteva, R., Dechev, M., & Zucca, P. (2022), A Multi-Event Study of Early-Stage SEP Acceleration by CME-Driven Shocks—Sun to 1 AU. Frontiers in Astronomy and Space Sciences, 9, 801429. doi:10.3389/fspas.2022.801429.
Rouillard, A. P., Pinto, R. F., Vourlidas, A., De Groof, A., Thompson, W. T., Bemporad, A., Dolei, S., Indurain, M., Buchlin, E., Sasso, C., Spadaro, D., Dalmasse, K., Hirzberger, J., Zouganelis, I., Strugarek, A., Brun, A. S., Alexandre, M., Berghmans, D., Raouafi, N. E., Wiegelmann, T., Pagano, P., Arge, C. N., Nieves-Chinchilla, T., Lavarra, M., Poirier, N., Amari, T., Aran, A., Andretta, V., Antonucci, E., Anastasiadis, A., Auchère, F., Bellot Rubio, L., Nicula, B., Bonnin, X., Bouchemit, M., Budnik, E., Caminade, S., Cecconi, B., Carlyle, J., Cernuda, I., Davila, J. M., Etesi, L., Espinosa Lara, F., Fedorov, A., Fineschi, S., Fludra, A., Génot, V., Georgoulis, M. K., Gilbert, H. R., Giunta, A., Gomez-Herrero, R., Guest, S., Haberreiter, M., Hassler, D., Henney, C. J., Howard, R. A., Horbury, T. S., Janvier, M., Jones, S. I., Kozarev, K., Kraaikamp, E., Kouloumvakos, A., Krucker, S., Lagg, A., Linker, J., Lavraud, B., Louarn, P., Maksimovic, M., Maloney, S., Mann, G., Masson, A., Müller, D., Önel, H., Osuna, P., Orozco Suarez, D., Owen, C. J., Papaioannou, A., Pérez-Suárez, D., Rodriguez-Pacheco, J., Parenti, S., Pariat, E., Peter, H., Plunkett, S., Pomoell, J., Raines, J. M., Riethmüller, T. L., Rich, N., Rodriguez, L., Romoli, M., Sanchez, L., Solanki, S. K., St Cyr, O. C., Straus, T., Susino, R., Teriaca, L., del Toro Iniesta, J. C., Ventura, R., Verbeeck, C., Vilmer, N., Warmuth, A., Walsh, A. P., Watson, C., Williams, D., Wu, Y., & Zhukov, A. N. (2020), Models and data analysis tools for the Solar Orbiter mission. Astronomy and Astrophysics, 642, A2. doi:10.1051/0004-6361/201935305.
Presentations at International Conferences
Kozarev, Kamen; Zucca, Pietro; Zhang, Peijin. ”Interferometric Imaging Observations of Transient Low-Frequency Non-Thermal Coronal Emission”. 2023, 19th European Space Weather Week, Toulouse, France. SWR01-870
Kozarev, Kamen. “Dynamics of Persistent Low-Frequency Radio Pulsations During the November 04, 2015 CME”. 2024, European Geosciences Union General Assembly 2024 (EGU24), held 14-19 April, 2024 in Vienna, Austria. id.18797
Камен Козарев. “The LOFAR Telescope Upgrade and LOFAR-BG Station – Current Status and Future Developments”, IV Национален конгрес по физически науки, 07-09.10.2024 г.
Kamen Kozarev, Vergil Yotov, Oleg Stepanyuk, Maria Petkova, Pietro Zucca, Mattia Mancini, Lyuben Branzalov. ”Automated Data Exploration and Discovery of LOFAR Interferometric Solar Observations”. 2024, Data Analysis and Software in Heliophysics 2024, Madrid, Spain – 15-18.10.2024
Камен Козарев, Росица Митева, Антоанета Антонова, Асен Мутафов, Момчил Дечев, Вергил Йотов, Мохамед Недал, Евгени Семков, Драгомир Марчев, Никола Петров, Живко Тенев, Олег Степанюк, Димитър Сотиров, Владимир Божилов, Евгени Овчаров. “Модернизацията на телескопа LOFAR и станцията LOFAR-BG – текущо състояние и бъдещо развитие”. 5ти Национален Форум за Съвременни Космически изследвания, 22-24.10.2024 г.
Kamen Kozarev, Rositsa Miteva, Momchil Dechev, Oleg Stepanyuk, Mohamed Nedal, Artem Epifanov. “Space Weather Monitoring and Forecasting at the Institute of Astronomy of the Bulgarian Academy of Sciences”. European Space Weather Week 2024, Coimbra, Portugal (04-08.11.12024), Abs. id 355
Oleg Stepanyuk, Kamen Kozarev
“Segmentation and Tracking of Eruptive Solar Phenomena with Convolutional Neural Networks (CNN)”. April 15-19, 2024. EGU General Assembly 2024, Vienna, Austria. https://doi.org/10.5194/egusphere-egu24-19248
Oleg Stepanyuk, Kamen Kozarev. “Multi-Instrument Ssegmentation and Tracking of Eruptive Solar Phenomena with Convolutional Neural Networks”. Data Analysis and Software in Heliophysics (DASH) and International Heliophysics Data Environment Alliance (IHDEA) Annual Meetings”. October 14–18, 2024. European Space Astronomy Centre (ESA). Madrid, Spain
Oleg Stepanyuk. “Segmentation and Tracking of Eruptive Solar Phenomena with Convolutional Neural Networks (CNN) and beyond “. Invited Speaker. National Forum on Contemporary Space Research 2024 (NaFSKI-V). October 22–24, 2024. Sofia, Bulgaria
Олег Степанюк. “Сегментиране и проследяване на еруптивни слънчеви явления с конволюционни невронни мрежи”. IV-ти Национален конгрес по физически науки, 7 – 9 октомври 2024 г., Интер Експо Център, София, България.
Oleg Stepanyuk, Kamen Kozarev. “Segmentation and Tracking of Solar Eruptive Phenomena: Data Driven and Algorithmic Approaches.” The XIV Serbian-Bulgarian Astronomical Conference. September 23-27, 2024. Vrnjačka Banja, Serbia
Artem Epifanov, Kamen Kozarev. “Constraining the SEP Source Population in Global Transport Modeling Using Parker Solar Probe Measurements”. National Forum on Contemporary Space Research 2024 (NaFSKI-V). October 22–24, 2024. Sofia, Bulgaria
Artem Epifanov, Kamen Kozarev. “Constraining the SEP Source Population in Global Transport Modeling Using Parker Solar Probe Measurements”. European Space Weather Week 2024, Coimbra, Portugal.
Kozarev, K., Zucca, P., Zhang, P., Stepanyuk, O., & Nedal, M. (2023), EGU General Assembly Conference Abstracts, EGU-13512. Exploring Coronal Structures in Metric-Decametric Radio Imaging. 10.5194/egusphere-egu23-13512.
Stepanyuk, O., & Kozarev, K. (2023), EGU General Assembly Conference Abstracts, EGU-10705. Advanced Multi-Instrument and Multi-Wavelength Image Processing and Feature Tracking for Remote CME Characterization with Convolutional Neural Network. 10.5194/egusphere-egu23-10705.
Nedal, M., Kozarev, K., Zhang, P., & Zucca, P. (2023), EGU General Assembly Conference Abstracts, EGU-4502. Coronal Diagnostics of Solar Type-III Radio Bursts Using LOFAR and PSP Observations. 10.5194/egusphere-egu23-4502.
Nedal, M., Kozarev, K. A., Zhang, P., & Zucca, P. (2022), AGU Fall Meeting Abstracts, 2022, SH45D-2367. Probing the Coronal Conditions using LOFAR Observations of Type-III Radio Bursts..
Zhang, P., Zucca, P., Kozarev, K. A., Gallagher, P., & Nedal, M. (2022), AGU Fall Meeting Abstracts, 2022, SH35E-1844. Incremental Development of LOFAR Space-weather (IDOLS)..
Kozarev, K. A., Zhang, P., & Zucca, P. (2022), AGU Fall Meeting Abstracts, 2022, SH25D-2075. Modeling and Observations of The Quiet Solar Corona at Metric-Decametric Radio Frequencies..
Stepanyuk, O., & Kozarev, K. A. (2022), AGU Fall Meeting Abstracts, 2022, IN22A-02. Advanced Image Processing and Feature Tracking for Remote CME Characterization with Convolutional Neural Network..
Zhang, P., Zucca, P., Kozarev, K., Carley, E., Wang, C. B., Franzen, T., Dabrowski, B., Krankowski, A., Magdalenic, J., & Vocks, C. (2022), 44th COSPAR Scientific Assembly. Held 16-24 July, 44, 2563. Imaging of the Quiet Sun in the Frequency Range of 20-80 MHz..
Kozarev, K. (2022), 44th COSPAR Scientific Assembly. Held 16-24 July, 44, 1193. Modeling Early-Stage SEP Acceleration and Transport in the Solar Corona and Inner Heliosphere..
Stepanyuk, O., Kozarev, K., & Nedal, M. (2022), Astrophysics Source Code Library, ascl:2206.024. Wavetrack: Arbitrary time-evolving solar object recognition and tracking..
Stepanyuk, O., & Kozarev, K. (2022), EGU General Assembly Conference Abstracts, EGU22-10739. Multi-source observations of a coronal mass ejection front from low to middle corona. 10.5194/egusphere-egu22-10739.
Kozarev, K., Zhang, P., & Zucca, P. (2022), EGU General Assembly Conference Abstracts, EGU22-5067. Metric-Decametric Gyrosynchrotron Radio Emission From the Quiet Solar Corona. 10.5194/egusphere-egu22-5067.
Zhang, P., Zucca, P., Kozarev, K., Wang, C., & Lofar ssw ksp Team (2022), EGU General Assembly Conference Abstracts, EGU22-1253. Imaging of the Quiet Sun in the Frequency Range of 20-80MHz. 10.5194/egusphere-egu22-1253.
Kozarev, K. (2022), Proceedings of the 2nd Machine Learning in Heliophysics, 25. Towards Lucky Imaging for Quiet-Time Low-Frequency Radio Solar Observations..
Stepanyuk, O., Kozarev, K., & Nedal, M. (2021), EGU General Assembly Conference Abstracts, EGU21-13803. Advanced Image Preprocessing and Feature Tracking for Remote CME Characterization. 10.5194/egusphere-egu21-13803.
Miteva, R., Kozarev, K., & Nedal, M. (2021), EGU General Assembly Conference Abstracts, EGU21-9953. Multi-energy analysis of SPREAdFAST proton events. 10.5194/egusphere-egu21-9953.
Nedal, M., Kozarev, K., & Miteva, R. (2021), EGU General Assembly Conference Abstracts, EGU21-9809. Characterizing the Dynamics of CME-Driven Coronal Bright Fronts Using The SPREAdFAST Framework. 10.5194/egusphere-egu21-9809.
Kozarev, K., Nedal, M., Miteva, R., Zucca, P., & Dechev, M. (2021), EGU General Assembly Conference Abstracts, EGU21-9775. Acceleration of Solar Energetic Particles in CME-Driven Coronal Shocks up to 30 Rs. 10.5194/egusphere-egu21-9775.
Adamis, A., Veronig, A., Podladchikova, T., Dissauer, K., Miteva, R., Guo, J., Haberle, V., Dumbovic, M., Temmer, M., Kozarev, K., Magdalenic, J., & Kay, C. (2021), EGU General Assembly Conference Abstracts, EGU21-3216. Statistical study of CMEs, lateral overexpansion and SEP events. 10.5194/egusphere-egu21-3216.
Zucca, P., Pellizzoni, A., Krankowski, A., Rothkaehl, H., Mann, G., Vocks, C., Magdalenic, J., Marque, C., Jackson, B., Fallows, R., Tomasik, L., Hamish, Reid, A. S., Gallagher, P., Vourlidas, A., Bisi, M. M., Carley, E., Matyjasiak, B., Kozarev, K., Dabrowski, B., Morosan, D., Tiburzi, C., & Chang, P. (2021), 43rd COSPAR Scientific Assembly. Held 28 January – 4 February, 43, 1065. Nonthermal electrons revealed by LOFAR..
Zucca, P., Pellizzoni, A., Krankowski, A., Rothkaehl, H., Mann, G., Vocks, C., Magdalenic, J., Marque, C., Jackson, B., Fallows, R., Tomasik, L., Miteva, R., Hamish, Reid, A. S., Gallagher, P., Vourlidas, A., Bisi, M. M., Carley, E., Matyjasiak, B., Kozarev, K., Dabrowski, B., Morosan, D., Tiburzi, C., & Zhabngm, P. (2021), 43rd COSPAR Scientific Assembly. Held 28 January – 4 February, 43, 945. Results from the LOFAR coordination with PSP..
Kozarev, K. A., Miteva, R., Nedal, M., Zucca, P., & Dechev, M. (2020), AGU Fall Meeting Abstracts, 2020, SH012-04. How does the state of the overlying solar corona influence SEP acceleration in CME-driven shocks?..
Kozarev, K., Miteva, R., Dechev, M., & Zucca, P. (2020), EGU General Assembly Conference Abstracts, 17156. Development of a Physics-Based Prototype Model Chain for Solar Energetic Particle Acceleration and Transport Forecasting for the Inner Heliosphere. 10.5194/egusphere-egu2020-17156.
Nedal, M., & Kozarev, K. (2020), EGU General Assembly Conference Abstracts, 16131. Estimating the SEP Flux for the Upcoming Solar Cycle 25 Using LSTM Network. 10.5194/egusphere-egu2020-16131.