Castellanos Duran, Juan Sebastian

Current position

2022 - present: Postdoctoral Researcher at  Max Planck Institute for Solar System Research

Former positions

2022-present: Core member of the Sunrise III team
2024-present: Member of the time-allocation committee (TAC) of the GREGOR telescope
2022-2025: Chair of the Sunrise III co-observations that encompass space- and ground-based observatories worldwide
2015:  IAESTE trainee, Windisch, Switzerland
2014: Internship in Astrophysics and Astronomical Instrumentation at INAOE. Puebla, Mexico
2013: NASA intern research program at Stanford University and LMSAL. CA, U.S.A.

Education

2022: Dr. rer. Nat. Physics – Max Planck Institute for Solar System Research & University of Göttingen
2016: Master of Science in Astronomy – Universidad Nacional de Colombia & University of Applied Sciences and Arts Northwestern Switzerland
2013: Bachelor of Science in Physics – Universidad Nacional de Colombia

Community services

2020-present: Peer review referee for ApJ, ApJL, Solar Physics, ASR, and MNRAS
2020-present: Past supervision: 1 visiting PhD, 4 Bachelor theses and 4 Master’s internship. Currently supervising 4 Bachelor theses and 3 Master's theses
2018-present: 8 PI campaigns at the 1.5m GREGOR telescope and 3 as Co-I
2026: SOC chair of the solar symposium at the 2026 European Astronomical Society Annual Meeting
2018-present: Seminar chair of the Solar Lower Atmosphere and Magnetism (SLAM) seminar
2019: LOC co-chair The 9th Solar Polarization Workshop

Selected Publications

Castellanos Durán, J. S., Iglesias, F., Solanki, S. K., Lagg, A., Milic, I., et al.: 2026, “A forest of emission lines observed by Sunrise III/SUSI above the solar limb”. ApJL (in press)

Castellanos Durán, J. S., Korpi-Lagg, A., Solanki, S.K., van Noort, M.,: 2025, “Superstrong Magnetic Fields in Sunspot Bipolar Light Bridges”. ApJL 978, L16

Castellanos Duran, J.S., Lagg, A., Solanki, S.K., Noort, M.v.: 2020, “Detection of the Strongest Magnetic Field in a Sunspot Light Bridge”. ApJ 895(2), 129.

Castellanos Duran, J.S., Kleint, L., Calvo-Mozo, B.: 2018, “A Statistical Study of Photospheric Magnetic Field Changes During 75 Solar Flares”. ApJ 852, 25.

Castellanos Duran, J.S., Milanovic, N., Lagg, A., Loeptien, B., van Noort, M., Solanki, S.K.: 2024 “The MODEST catalog of depth-dependent spatially coupled inversions of sunspots observed by Hinode/SOT-SP”. In press in A&A. arXiv:2403.06960

Castellanos Duran, J.S., Lagg, A., Solanki, S.K.: 2021, “How rare are counter Evershed flows?” A&A 651, L1 .

Castellanos Duran, J.S., Kleint, L.: 2020, “The Statistical Relationship between White-light Emission and Photospheric Magnetic Field Changes in Flares”. ApJ 904(2), 96.

Castellanos Duran, J.S., Korpi-Lagg, A., Solanki, S.K.: 2023, “Expulsion of Counter Evershed Flows from Sunspot Penumbrae”. ApJ 952(2), 162.