Stevanus Kristianto Nugroho

Under development

Research Interests

Observational astronomy | High-resolution spectroscopy | Exoplanet atmosphere

Education

• PhD, Astronomy, Tohoku University, Japan, October 2015-September 2018
• M.Sc., Astronomy, Tohoku University, Japan, October 2013-September 2015
• B.Sc., Physics, Institut Teknologi Sepuluh Nopember Surabaya, Indonesia, August 2009-February 2013

Employment

• Project research staff, Astrobiology Center, November 2020-Present
• Post-doctoral research fellow, Queen’s University Belfast, October 2018-October 2020

Grants

• JSPS Grants-in-Aid for Scientific Research – KAKENHI Number 22K14092, April 2022-March 2025, "Project Horizon: Exploring the Atmosphere of Tidally-locked Worlds using High-resolution Spectroscopy", 4.55 million JPY

Selected refereed papers | NASA ADS (click me)

• Swaetha Ramkumar, Neale Gibson, Stevanus K Nugroho, et al. 2023, MNRAS, "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"
• Sam O. M. Wright, Stevanus K Nugroho, Matteo Brogi et al. 2023, AJ, "A Spectroscopic Thermometer: Individual Vibrational Band Spectroscopy with the Example of OH in the Atmosphere of WASP-33b"
• Cathal Maguire, Neale P. Gibson, Stevanus K Nugroho, et al. 2023, MNRAS, "High-resolution atmospheric retrievals of WASP-121b transmission spectroscopy with ESPRESSO: Consistent relative abundance constraints across multiple epochs and instruments"
• Andrew Ridden-Harper, Stevanus K Nugroho, et al. 2023, AJ, "High-Resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b"
• Miranda K Herman, Ernst JW de Mooij, Stevanus K Nugroho, et al. 2022, AJ, "Day-side Fe I Emission, Day-Night Brightness Contrast and Phase Offset of the Exoplanet WASP-33b"
• Neale P Gibson, Stevanus K Nugroho, Joshua Lothringer, Cathal Maguire, David K Sing, 2022, MNRAS, "Relative abundance constraints from high-resolution optical transmission spectroscopy of WASP-121b, and a fast model-filtering technique for accelerating retrievals"
• Stevanus K. Nugroho, Hajime Kawahara, Neale P Gibson, et al. 2021. ApJ. 910L, 9N, “First Detection of Hydroxyl Radical Emission from an Exoplanet Atmosphere: High-dispersion Characterization of WASP-33b using Subaru/IRD”
• S. K. Nugroho, N. P. Gibson, E. J. W. de Mooij, et al. 2020. ApJ. 898 (2), L31., “Detection of Fe i Emission in the Dayside Spectrum of WASP-33b”
• Neale P Gibson, Stephanie Merritt, Stevanus K Nugroho, et al. 2020. MNRAS. 493 (2), 2215‑2228, "Detection of Fe i in the atmosphere of the ultra-hot Jupiter WASP-121b, and a new likelihood-based approach for Doppler-resolved spectroscopy"
• Stevanus K. Nugroho, Hajime Kawahara, Kento Masuda, et al. 2017. AJ. 154:221. ”High-resolution Spectroscopic Detection of TiO and a Stratosphere in the Day-side of WASP-33b”

Selected approved telescope proposals

PI proposals

• "InfraRed Coolants in the Atmosphere of the Coldest Ultra Hot Jupiter", S24A-097, IRD-Subaru telescope, 1.5 night
• "3D Atmosphere of an Ultra-hot Jupiter", S23B-073, IRD-Subaru telescope, 1.5 night
• "Probing the 3D Properties and the Variability of an Ultra Hot Jupiter's Atmosphere", S21A-OT22, HDS-Subaru telescope, 0.5 night
• "Probing the 3D Properties and the Variability of an Ultra Hot Jupiter's Atmosphere", GN-2021A-FT-217, GRACES-Gemini North, 0.5 night
• "Characterising the atmosphere of the extremely hot-Jupiter WASP-33b", S21B-111, IRD-Subaru telescope, 2 nights
• "WASP-189b as a twin sibling of ultra hot jupiter WASP-33b, or is it?", 2021B034, SPIRou-CFHT, 1.5 nights
• "Unveiling the Atmosphere of a Hot Jupiter around a Binary Stellar System", 2020B034, Veloce-AAT, 1 night
• "WASP-189b as a twin sibling of ultra hot jupiter WASP-33b, or is it ?", 2020A039, CARMENES-CAHA, 1.3 nights; SPIRou-CFHT, 1 night
• "De-mystifying WASP-33b's atmosphere using CARMENES", 2019B043, CARMENES-CAHA, 1.5 nights
• "CO detection of directly imaged exoplanet", S16B-075N, IRCS-Subaru telescope, 1 night

co-I proposals

• "Proposal: Spatially resolving the atmosphere of the Ultra-hot Jupiter MASCARA-1b with CRIRES+”, 112.260X, CRIRES+-VLT, 0.5 night; PI: Neale Gibson
• "Showcasing the potential of CRIRES+ for exoplanet spectroscopy: a phase curve of the ultra-hot Jupiter MASCARA-1b”, 107.22TQ, CRIRES+-VLT, 5 hours; PI: Neale Gibson
• "Peeking above the clouds: exoplanet atmospheres and winds at high spectral resolution with ESPRESSO", 106.21R1, ESPRESSO-VLT, 1.4 nights; PI: Neale Gibson
• "Finding methane/ammonia in a cloudless warm Neptune", S20A0019N, IRD-Subaru telescope, 0.5 nights; PI: Hajime Kawahara
• "Storms or Systematics? Investigating the changing eclipse depth of ultra-hot Jupiter WASP-12b", 2019B052, ANDOR-OHP120, 4 nights; BUSCA-CAHA22, 4 nights; ALFOSC-NOT, 4 nights; PI: Matthew Hooton
• "Peeking above the clouds: Exoplanet atmospheres at high spectral resolution with ESPRESSO", 0104.C-0642(A), ESPRESSO-VLT, 1.4 nights; PI: Neale Gibson
• "Probing thermal inversion in hot-Jupiter's atmosphere with IRD", S19A0074N, IRD-Subaru telescope, 1 night; PI: Masato Ishizuka

Honors & Awards

• The 13th Izumihagikai Encouragement Award from Physics Alumni Association of Tohoku University Japan, 2021
• Indonesia Endowment Fund for Education Scholar Fellow (Doctoral degree), Sendai, Japan, 2015-2018
• Indonesia Endowment Fund for Education Scholar Fellow (Master degree), Sendai, Japan, 2013-2015
• Cawan Getsemani Scholarship, Surabaya, Indonesia, 2009-2013
• Honorable mention, 3rd International Olympiad on Astronomy and Astrophysics, Teheran, Iran, 2009
• Gold medal, National Olympic on Astronomy, Makassar, Indonesia, 2008

Other activities

• Referee for major astrophysical journals (Astronomy & Astrophysics, Astronomical Journal, and Astrophysical Journal)

Skills

• Programming: Git, Python, IRAF, Latex, JAX
• Languages: Bahasa Indonesia (Native), Javanese (Native), English (Fluent), Japanese (Basic)