Yoonsoo P. Bach
- they/them - APA recommendation. I don't believe my sex is relevant to science :)
- NASA SPEHREx mission
- Current Affiliation (2025 May-):
- Appointed Senior Researcher @ KASI, Korea (Division of Fundamental Astronomy and Space Science > Center for Galaxy Evolution Research)
(last update 2026-01-13)
| PR 1st author | PR nth author | non-PR 1st author | non-PR nth author | |
|---|---|---|---|---|
| Published or Accepted | 6 | 17 | - | 1 |
| Submitted/Under-Review | 2 | 1 | ||
| In Prep. | - | - | - |
- Non-PR (Peer-Reviewed) includes RNAAS as of writing
Profiles:
Summary of Education & Affiliations
(details in CV)
- Appointed Senior Researcher (2025.05 - ) & PostDoc. (2023.09 - 2025.04) @ KASI, for NASA SPHEREx mission
- PhD. @ SNU, Astronomy (2023)
- Best PhD Thesis Award by SNU CNS (College of Natural Sciences)
- Hong Sik Yun Award in Heliospheric Astrophysics for the Best Doctoral Research by the Korean Astronomical Society
- BSc. @ KAIST, Physics (2016)
Research Interest
My general interest includes emission and scattering processes on airless objects in the solar system (theory, observation, experimental data analyses, data reduction and related statistics and coding).
Currently I am working at KASI (Korea) as an appointed senior researcher for NASA's SPHEREx (solar system science, image simulator and the mission data center pipeline development).
In theoretical approach, the main topics I focus on are:
- Thermal radiation, radiation pressures from airless bodies.
- DESTINY+ mission related (3200 Phaethon).
In observational approach, the main topics I focus on are:
- Optical & near-infrared (NIR) polarimetry/photometry
- Experience in HAWAII infrared array, as well as optical detectors
- Experience in extra-effort for accurate photometry (flat-field analyses, statistics, instrument parameter analyses, absolute/relative photometry of trailed objects, ...)
- Experience in detector parameter analysis (precise statistical assessments on gain, readout noise, waveplate rotation, ...)
Selected Papers
First-author & selected N-th author publications
- Lisse, Bach+ (2025) RNAAS: First SPHEREx report of 3I/ATLAS (more papers in prep)
- Crill, Bach+ (2025) ApJS: SPHEREx Sky Simulator
- Bach+ (2024b) A&A: NIR polarimetry of Dawn mission targets (Ceres & Vesta) using NHAO NIC.
- Bach+ (2024a) A&A: NIR polarimetry of airless objects in the negative branch (codes here).
- Bach+ (2022) StGal (Instrum & Coding): NIR polarimetric pipeline development for NHAO NIC, detector parameter refinements (NICpolpy; tutorial here).
- Bach+ (2021) A&A (Theory): Dust ejection from (3200) Phaethon and near-Sun asteroids by thermal radiation pressure (TPM & calculation codes here).
- Bach+ (2019) JKAS: Optical photometry of (4179) Toutatis using KMTNet, determination of geometric albedo (photometry & analyses codes here).
- Bach+ (2017) AJ: Thermal modeling of comet-like objects (AKARI)
- Ishiguro, Bach+ (2022) MNRAS: Optical polarimetry (155140) 2005 UD. Determination of the anhydrous nature using polarimetry (photometry & MCMC codes here).
- Ishiguro+ (2017) AJ: Optical polarimetry (1566) Icarus in the positive branch (Pmax), determination of particle size
- Geem+ (2023) MNRAS: Optical spectroscopy of Hayabusa2# misison target (2001 CC21.)
- Geem+ (2022) MNRAS: Optical polarimetry (3200) Phaethon in the negative branch.
- Ito+ (2018) NatCo: Optical polarimetry (3200) Phaethon in the positive branch (Pmax).
- Kuroda+ (2021) ApJL: Optical polarimetry (162173) Ryugu in the positive branch (Pmax).
- Takahashi+ (2022) A&A: Optical polarimetry of the Earthshine on the Moon, found correlation with ocean coverage.
In prep: effect of fringe in NIR, dust ejection from Bennu, etc.
Coding & Education
Scientific tool development & astronomical data reduction lectures in Python.
- Significant contribution to SNU Astronomical Observation classes (SNU_AOclass)
- See the 📌pinned repos below.
More details: PDF CV
