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Ilje Cho

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Ilje Cho

Professor

20162026

Research activity per year

Personal profile

In Korean

조일제 교수(자연과학대학 지구시스템과학부 (천문대기과학전공))

Education

o (2014) B.A., Kyungpook National University, Daegu, Korea
o (2021) Ph.D., University of Science and Technology (UST), Daejeon, Korea

Professional Experience

o (2026.03~Present) Assistant Professor, Kyungpook National University, Daegu, Korea
o (2025.12~2026.01) Senior Researcher, Korea Astronomy and Space Science Institute (KASI), Daejeon, Korea
o (2023~2025) Postdoctoral Fellow, Korea Astronomy and Space Science Institute (KASI) / Yonsei University, Seoul, Korea
o (2021~2023) Postdoctoral Researcher, Instituto de Astrofisica de Andalucia (IAA-CSIC), Granada, Spain

Research Interests

Supermassive black hole, Active Galactic Nuclei, Radio Astronomy, Very Long Baseline Interferometry

Major Research Achievements

o First M87 Event Horizon Telescope Results (a series of papers by the Event Horizon Telescope Collaboration)
o First Sagittarius A* Event Horizon Telescope Results (a series of papers by the Event Horizon Telescope Collaboration)
o The intrinsic structure of Sagittarius A* at 1.3 cm and 7 mm
o Precessing jet nozzle connecting to a spinning black hole in M87
o The persistent shadow of the supermassive black hole of M87. I. Observations, calibration, imaging, and analysis
o Unveiling the bent-jet structure and polarization of OJ287 at 1.7 GHz with space VLBI
o Origin of the ring ellipticity in the black hole images of M87*

url

https://iljecho.github.io/

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Collaborations and top research areas from the last five years

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  • Spatially resolved polarization swings in the supermassive binary black hole candidate OJ 287 with first Event Horizon Telescope observations

    Gómez, J. L., Cho, I., Traianou, E., Krichbaum, T. P., Zhao, G. Y., Lico, R., Fuentes, A., Foschi, M., Dahale, R., Georgiev, B., Moriyama, K., Wielgus, M., Gold, R., Pesce, D. W., Müller, H., Jorstad, S., Toscano, T., Röder, J., Martí, J. M. & Perucho, M. & 263 others, Kovalev, Y. Y., Komossa, S., Gopakumar, A., Valtonen, M. J., Bruni, G., Chandra, S., Akiyama, K., Albentosa-Ruíz, E., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., Bremer, M., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Carlos, D. F., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Curd, B., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Dihingia, I. K., Doeleman, S. S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Galison, P., Gammie, C. F., García, R., Gentaz, O., Geertsema, G., Goddi, C., Gómez-Ruiz, A. I., Gu, M., Gurwell, M., Hada, K., Haggard, D., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. W. L., Huang, L., Hughes, D. H., Ikeda, S., Violette Impellizzeri, C. M., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., Jiménez-Rosales, A., Johnson, M. D., Jones, A. C., Joshi, A. V., Jung, T., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. J., Kim, J. Y., Kim, J., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kuo, C. Y., Bella, N. L., Lee, S. S., Levis, A., Li, Z., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Montgomery, J., Moran, J. M., Moscibrodzka, M., Mulaudzi, W., Müller, C., Mus, A., Musoke, G., Myserlis, I., Nagai, H., Nagar, N. M., Nair, D. G., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. N., Neilsen, J., Ni, C., Nowak, M. A., Oh, J., Okino, H., Olivares Sánchez, H. R., Oyama, T., Özel, F., Palumbo, D. C. M., Paraschos, G. F., Park, J., Parsons, H., Patel, N., Pen, U. L., Piétu, V., PopStefanija, A., Porth, O., Prather, B., Principe, G., Psaltis, D., Pu, H. Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Romero-Cañizales, C., Ros, E., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Saurabh, Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. F., Shao, L., Shen, Z., Silpa, S., Small, D., Sohn, B. W., SooHoo, J., Salas, L. D. S., Souccar, K., Stanway, J. S., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zeng, A. L., Zensus, J. A., Zhang, S. & Zhao, S. S., 1 Jan 2026, In: Astronomy and Astrophysics. 705, A23.

    Research output: Contribution to journal › Article › peer-review

    Open Access

  • Revealing a ribbon-like jet in OJ 287 with RadioAstron

    Traianou, E., Gómez, J. L., Cho, I., Chael, A., Fuentes, A., Myserlis, I., Wielgus, M., Zhao, G. Y., Lico, R., Moriyama, K., Dey, L., Bruni, G., Dahale, R., Toscano, T., Gurvits, L. I., Lisakov, M. M., Kovalev, Y. Y., Lobanov, A. P., Pushkarev, A. B. & Sokolovsky, K. V., 1 Aug 2025, In: Astronomy and Astrophysics. 700, A16.

    Research output: Contribution to journal › Article › peer-review

    Open Access
    6 Scopus citations

  • Discovery of Limb Brightening in the Parsec-scale Jet of NGC 315 through Global Very Long Baseline Interferometry Observations and Its Implications for Jet Models

    Park, J., Zhao, G. Y., Nakamura, M., Mizuno, Y., Pu, H. Y., Asada, K., Takahashi, K., Toma, K., Kino, M., Cho, I., Hada, K., Edwards, P. G., Ro, H., Kam, M., Yi, K., Lee, Y., Koyama, S., Byun, D. Y., Phillips, C. & Reynolds, C. & 2 others, Hodgson, J. A. & Lee, S. S., 1 Oct 2024, In: Astrophysical Journal Letters. 973, 2, L45.

    Research output: Contribution to journal › Article › peer-review

    Open Access
    12 Scopus citations

  • First Sagittarius A∗ Event Horizon Telescope Results. VII. Polarization of the Ring

    The Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, L25.

    Research output: Contribution to journal › Article › peer-review

    Open Access
    78 Scopus citations

  • First Sagittarius A∗ Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

    The Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, L26.

    Research output: Contribution to journal › Article › peer-review

    Open Access
    80 Scopus citations
View all 64 Research outputs