Home | Se-Heon Oh

Se-Heon Oh

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I am an Associate Professor at the Department of Physics and Astronomy of Sejong University in Seoul, South Korea. I mainly work on the dynamics of neutral hydrogen (HI) gas in galaxies in the local Universe (within ~10 Mpc), with a focus on gas inflows and outflows, circular and non-circular motions, and their connection to star formation and the baryon-dark matter interplay.

Research Interests

cma — SKA precursor and pathfinder view of the sky

HI galaxy surveys with SKA-Mid/-precursor/-pathfinder radio telescopes
HI gas kinematics via multi-Gaussian profile decomposition
Cold-mode gas accretion in nearby galaxies
Dark matter distribution in dwarf galaxies and tests of ΛCDM simulations on galactic scales
Halo substructures via strong gravitational lensing with SKA-VLBI observations
Gas and dark matter properties of dwarf galaxies from DARWIN simulations
Development of Deep Neural Network (DNN)-based HI kinematic analysis tools

Selected Publications

“Extraction of HI gas with bulk motions in the disc of galaxies”, Oh, S. H. & Wang, J. (2025), Monthly Notices of the Royal Astronomical Society
“Rotation curve analysis of dwarf galaxies from LVHIS”, Oh, S. H., Kim, S.N., Kim, S.J., Brinks, E. (2025), Astrophysics and Space Science
“MHONGOOSE: A MeerKAT nearby galaxy HI survey”, de Blok, W. J. G. et al. (2024), Astronomy and Astrophysics
“FEASTS: IGM Cooling Triggered by Tidal Interactions through the Diffuse HI Phase around NGC 4631”, Wang, J., Yang, D., Oh, S. H., Staveley-Smith, L., Wang, J., Wang, Q. D., Hess, K. M., Ho, L. C., Hou, L., Jing, Y., Kamphuis, P., Li, F., Lin, X., Liu, Z., Shao, L., Wang, S. & Zhu, M. (2023), Astrophysical Journal
“WALLABY Pilot Survey: HI gas kinematics of galaxy pairs in cluster environment”, Kim, Shin-Jeong, Oh, S. H., Wang, J., Staveley-Smith, L., Koribalski, B. S., Kim, M., Park, H. J., Kim, S., Spekkens, K., Westmeier, T., Wong, O. I., Meurer, G. R., Kamphuis, P., Catinella, B., Mcquinn, K. B. W., Bigiel, F., Holwerda, B. W., Rhee, J., Lee-Waddell, K. & Deg, N. (2023), Monthly Notices of the Royal Astronomical Society
“Kinematic decomposition of the HI gaseous component in the Large Magellanic Cloud”, Oh, S. H., Kim, Shinna, For, B. Q. & Staveley-Smith, L. (2022), Astrophysical Journal
“Gas dynamics and star formation in NGC 6822”, Park, H. J., Oh, S. H., Wang, J., Zheng, Y., Zhang, H. X. & de Blok, W. J. G. (2022), Astronomical Journal
“Robust profile decomposition for large extragalactic spectral-line surveys”, Oh, S. H., Staveley-Smith, L. & For, B. Q. (2019), Monthly Notices of the Royal Astronomical Society
“2D Bayesian automated tilted-ring fitting of disc galaxies in large HI galaxy surveys: 2DBAT”, Oh, S. H., Staveley-Smith, L., Spekkens, K., Kamphuis, P. & Koribalski, B. S. (2018), Monthly Notices of the Royal Astronomical Society
“High-resolution mass models of dwarf galaxies from LITTLE THINGS”, Oh, S. H., Hunter, D. A., Brinks, E., Elmegreen, B. G., Schruba, A., Walter, F., Rupen, M. P., Young, L. M., Simpson, C. E., Johnson, M. C., Herrmann, K. A., Ficut-Vicas, D., Cigan, P., Heesen, V., Ashley, T. & Zhang, H. X. (2015), Astronomical Journal
“Cuspy no more: How outflows affect the central dark matter and baryon distribution in Λ cold dark matter galaxies”, Governato, F., Zolotov, A., Pontzen, A., Christensen, C., Oh, S. H., Brooks, A. M., Quinn, T., Shen, S. & Wadsley, J. (2012), Astronomical Journal
“Dark and luminous matter in things dwarf galaxies”, Oh, S. H., de Blok, W. J. G., Walter, F., Brinks, E. & Kennicutt, R. C. (2011), Astronomical Journal
“The central slope of dark matter cores in dwarf galaxies: Simulations versus things”, Oh, S. H., Brook, C., Governato, F., Brinks, E., Mayer, L., de Blok, W. J. G., Brooks, A. & Walter, F. (2011), Astronomical Journal
“High-resolution dark matter density profiles of things dwarf galaxies: Correcting for noncircular motions”, Oh, S. H., de Blok, W. J. G., Walter, F., Brinks, E. & Kennicutt, R. C. (2008), Astronomical Journal
“High-resolution rotation curves and galaxy mass models from things”, W. J.G. de Blok, F. Walter, E. Brinks, C. Trachternach, S. H. Oh, R. C. Kennicutt (2008), Astronomical Journal
PhD thesis
Dark and luminous matter in dwarf galaxies (Research School of Astronomy & Astrophysics, Mt. Stromlo Observatory, The Australian National University, 2009)