Stevanus Kristianto Nugroho

About

Stevanus Kristianto Nugroho is an assistant professor at the Department of Earth and Planetary Sciences, Institute of Science Tokyo. Before that, he was a project research staff at the Astrobiology Center, National Institutes of Natural Sciences, Japan. He earned his bachelor degree in Physics from Sepuluh Nopember Institute of Technology Surabaya, Indonesia. He obtained his PhD and Master degree from Tohoku University, Japan before going to work as a postdoctoral research fellow at Queen's University Belfast for two years. His research interest is characterising exoplanet atmosphere.

Employment

• National Institutes of Natural Sciences Astrobiology Center Visiting Assistant Professor
  2025 - Present
• Institute of Science Tokyo Assistant professor
  2025 - Present
• National Institutes of Natural Sciences Astrobiology Center Project research staff
  2020 - 2025
• 自然科学研究機構アストロバイオロジーセンター/National Institutes of Natural Sciences, Astrobiology Center 特任研究員/Project Researcher
  2020 - 2025
• Queen's University Belfast Postdoctoral Research Fellow
  2018 - 2020

Education

• Tohoku University Ph.D.
  2015 - 2018
• Tohoku University M. Sc.
  2013 - 2015
• Institut Teknologi Sepuluh Nopember B. Sc
  2009 - 2013

Projects & Funding

• Project Horizon: Exploring the Atmosphere of Tidally-locked Worlds using High-resolution Spectroscopy JSPS
  2022 - 2025

Publications (25)

• Atmospheric Retrieval of Subaru/IRD High-resolution Spectrum of the Archetype T-type Brown Dwarf Gl 229 B*
  The Astrophysical Journal 2025 DOI: 10.3847/1538-4357/adddbd
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• Differentiable Modeling of Planet and Substellar Atmosphere: High-resolution Emission, Transmission, and Reflection Spectroscopy with ExoJAX2
  The Astrophysical Journal 2025 DOI: 10.3847/1538-4357/adcba2
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• New perspectives on MASCARA-1b: A combined analysis of pre- and post-eclipse emission data using CRIRES+
  Astronomy & Astrophysics 2025 DOI: 10.1051/0004-6361/202453520
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• Evidence of Water Vapor in the Atmosphere of a Metal-rich Hot Saturn with High-resolution Transmission Spectroscopy
  The Astronomical Journal 2024 DOI: 10.3847/1538-3881/ad5be9
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• High resolution atmospheric retrievals of WASP-76b transmission spectroscopy with ESPRESSO: Monitoring limb asymmetries across multiple transits
  Astronomy & Astrophysics 2024 DOI: 10.1051/0004-6361/202449449
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• Atmospheric retrieval of Subaru/IRD high-resolution spectrum of the archetype T-type brown dwarf Gl 229 B
  2024 DOI: 10.48550/ARXIV.2410.11561
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• High-resolution emission spectroscopy retrievals of MASCARA-1b with CRIRES+: strong detections of CO, H2O, and Fe emission lines and a C/O consistent with solar
  Monthly Notices of the Royal Astronomical Society 2023 DOI: 10.1093/mnras/stad2476
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• A Spectroscopic Thermometer: Individual Vibrational Band Spectroscopy with the Example of OH in the Atmosphere of WASP-33b
  Sam Wright, Stevanus K. Nugroho, Matteo Brogi +26 more
  The Astronomical Journal 2023 DOI: 10.3847/1538-3881/acdb75
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• High-resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b
  The Astronomical Journal 2023 DOI: 10.3847/1538-3881/acbd39
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• High-resolution atmospheric retrievals of WASP-121b transmission spectroscopy with ESPRESSO: Consistent relative abundance constraints across multiple epochs and instruments
  Monthly Notices of the Royal Astronomical Society 2022 DOI: 10.1093/mnras/stac3388
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• A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508
  Publications of the Astronomical Society of Japan 2022 DOI: 10.1093/pasj/psac044
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• Dayside Fe i Emission, Day–Night Brightness Contrast and Phase Offset of the Exoplanet WASP-33b
  Astronomical Journal 2022 DOI: 10.3847/1538-3881/ac5f4d
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• Relative abundance constraints from high-resolution optical transmission spectroscopy of WASP-121b, and a fast model-filtering technique for accelerating retrievals
  Monthly Notices of the Royal Astronomical Society 2022 DOI: 10.1093/mnras/stac091
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• An inventory of atomic species in the atmosphere of WASP-121b using UVES high-resolution spectroscopy
  Monthly Notices of the Royal Astronomical Society 2021 DOI: 10.1093/mnras/stab1878
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• Neutral Metals in the Atmosphere of HD 149026b
  The Astronomical Journal 2021 DOI: 10.3847/1538-3881/abdb25
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• First Detection of Hydroxyl Radical Emission from an Exoplanet Atmosphere: High-dispersion Characterization of WASP-33b Using Subaru/IRD
  The Astrophysical Journal Letters 2021 DOI: 10.3847/2041-8213/abec71
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• Is TiO emission present in the ultra-hot Jupiter WASP-33b? A reassessment using the improved ExoMol T OTO line list
  Astronomy and Astrophysics 2021 DOI: 10.1051/0004-6361/202039135
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• Detection of Fe i Emission in the Dayside Spectrum of WASP-33b*
  The Astrophysical Journal Letters 2020 DOI: 10.3847/2041-8213/aba4b6
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• Searching for thermal inversion agents in the transmission spectrum of KELT-20b/MASCARA-2b: detection of neutral iron and ionised calcium H&K lines
  Monthly Notices of the Royal Astronomical Society 2020 DOI: 10.1093/mnras/staa1459
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• Non-detection of TiO and VO in the atmosphere of WASP-121b using high-resolution spectroscopy
  Astronomy & Astrophysics 2020 DOI: 10.1051/0004-6361/201937409
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