Yonsei University

Center For Galaxy Evolution Research

Funded by Key Research Institutes in Universties program

Development and operation of the GALEX UV space telescope project, Y2 isochrones, Yonsei Evolutionary Population Synthesis (YEPS) model,
theoretical modeling of galaxy formation (NewHorizon, Horizon-AGN), reionization (SPHINX), and GMCs (PRALINES),
observational and numerical studies of environmental effects


Research Team

Prof. Young-Wook Lee

(Principal Investigator)
Yonsei University
PhD: Yale Univ.

Prof. Taysun Kimm

(Project I Leader)
Yonsei University
PhD: Univ. of Oxford

Prof. Sukyoung Yi

(Project I)
Yonsei University
PhD: Yale Univ.

Prof. Aeree Chung

(Project I)
Yonsei University
PhD: Columbia Univ.

Prof. Suk-Jin Yoon

(Project II)
Yonsei University
PhD: Yonsei Univ.

Dr. Chul Chung

(Project II Leader)
Yonsei University
PhD: Yonsei Univ.

Dr. Sanjaya Paudel

(Project II)
Yonsei University
PhD: Heidelberg Univ.

Dr. Emanuele Contini

(Project I)
Yonsei University
PhD: Univ. of Trieste

Dr. Dongwook Lim

(Project II)
Yonsei University
PhD: Yonsei Univ.

Dr. Junhyun Baek

(Project I)
Yonsei University
PhD: Yonsei Univ.

Dr. Hyejeon Cho

(Project II)
Yonsei University
PhD: Yonsei Univ.

Dr. Sohee Jang

(Project II)
Yonsei University
PhD: Yonsei Univ.

Dr. Xilong Liang

(Project II)
Yonsei University

Dr. Maxime Rey

(Project I)
Yonsei University
PhD: Univ Lyon

Dr. Seungsoo Hong

(Project II)
Yonsei University
PhD: Yonsei Univ.

Job Vancancies

Multiple postdoc/research professor positions in galaxy evolution and supernova cosmology (6/7 - 7/7)

The Center for Galaxy Evolution Research (CGER) at Yonsei University, South Korea, invites applications for multiple (up to 8) postdoctoral research associates or research professors (non-tenure) to begin any time between July and December 2022. The positions are initially for 2 years and could be extended to four years based on the mid-term evaluation. The applicant should have a PhD degree at the time of starting the position.

Preference will be given to those who have good backgrounds on
  • Supernova cosmology, photometric/spectroscopic analysis of host galaxies (w/ Prof. Young-Wook Lee; 3 positions)
  • (a) Developing unstructured moving-mesh hydrodynamics codes, or (b) AI for galactic astronomy, or (c) Observations/simulations on galaxies and extragalactic globular clusters (w/ Prof. Suk-Jin Yoon; 1 position)
  • Numerical simulation of galaxy formation or GMCs (w/ Profs. Sukyoung Yi and Taysun Kimm; 3 positions)
  • Observation of environmental effects or extragalactic ISM (w/ Prof. Aeree Chung; 1 position)
Current interests of the group include observational cosmology, stellar populations of galaxies and globular clusters, galaxy cluster simulations and galaxy formation mainly using the NewHorizon simulation, modelling of star formation and stellar feedback, simulations and observations of environmental effects in galaxy clusters, etc.

Salary will be commensurate with experience and qualifications (up to 54,000,000 KRW (~$43,237) per annum for Grade RA3 or up to 69,600,000 KRW (~$55,731) per annum for Grade RA4 or RP3). The pay grade will be determined based on the experience and performance. Research funds are available for travel, publication fee, and computer.

Applicants should send 1) a short research plan (1 page), 2) CV with a publication list, and 3) a list of two referees who would write a letter of recommendation if the applicant is shortlisted to Prof. Taysun Kimm (tkimm@yonsei.ac.kr) by 7 July 2022. The positions are available immediately and will remain open until filled.

Questions may be directed to Prof. Young-Wook Lee (ywlee2@yonsei.ac.kr), Prof. Sukyoung Yi (yi@yonsei.ac.kr), Prof. Suk-Jin Yoon (sjyoon0691@yonsei.ac.kr), Prof. Aeree Chung (achung@yonsei.ac.kr), or Prof. Taysun Kimm (tkimm@yonsei.ac.kr).

Research Projects

Project 1: Unveling the origin of galaxies via next generation galaxy evolution models

Phase I: Understanding the baryon cycle and developing a numerical galaxy formation code
  • Effects of stellar feedback on baryon cycles
  • Impact of star formation physics on galaxy evolution
  • Developement of the RAMSES-yOMP code and observational pipelines

Phase II: Developing accurate physics modules and tackling mysteries in galactic astronomy
  • Machine learning-aided radiative cooling models
  • Emergence of circumgalatic medium
  • Black hole feedback and physical properties of elliptical galaxies
  • Reionization and dwarf galaxy formation in the early universe

Phase III: Unveiling the origin of galaxies via large-scale cosmological simulations
  • Confronting observations with numerical simulations with different cosmologies
  • Origin of angular momentum in galaxies
  • Nature-Nurture problem of galaxies

Project 2: Invegistigating the accelerating universe and dark energy by studying supernova host galaxies

Phase I: High-fidelity spectroscopic and photometric observations of Type Ia host galaxies
  • Photometric and spectroscopic observations of Type Ia supernova host galaxies in the local Universe
  • Development of the Yonsei Evolutionary Populaton Synthesis models
  • New standandization of Type Ia supernova

Phase II: Type Ia supernova standardization and precise determinaton of host galaxy properties
  • Application of the age determination method (developed in Phase I) to high-z galaxies
  • Applicability of the local correlations to high-z galaxies
  • Improving theoretical models via comparison with observations

Phase III: Cosmology based on new accurate standardization of Type Ia SN
  • Improving Type Ia supernova cosmology
  • Investigation of the correlation between the age of the universe and host galaxy properties
  • New cosmological parameters and age of the universe

Significant Research Achievements

Nature: 1999/Nov

특이 구상성단 Omega Cen의 정체 규명!

Science: 2002/Jul

우리은하 구상성단계의 Oosterhoff 이분법 규명!

Science: 2006/Feb

타원은하 구상성단계 연구의 새로운 패러다임 제시!

Nature: 2006/Aug

타원은하의 별형성 증거 발견!

Science: 2008/Jul

초신성의 자외선 전조증상 발견

Nature: 2009/Nov

구상성단의 은하빌딩블럭 증거 발견!

MNRAS: 2015/Sep

우리은하 벌지의 형성기원 규명

Nature Astronomy: 2017

충돌은하단 암흑물질 규명

ApJ: 2018/Dec

구상성단 다중항성종족의 기원 규명

ApJ: 2020/Jan

2011년 노벨물리학상 암흑에너지 연구의 중대 오류 발견

이 외, 천문학 국제 최상위 10% 저널* 271편 (2010.09 - 2020.11)

Observing Facilities

International Collaboration

1. NASA (미국)

NASA의 공식파트너 및 Co-I 자격으로 GALEX 자외선 우주망원경 공동운용, 자외선 관측자료 확보

2. Canegie Observatories (미국)

칠레 LCO 2.5m 망원경 공동운용, 협대역 측광, 타원은하의 분광관측

3. Univ. of Texas Austin (미국)

McDonald 2.7m 망원경, 북반구에 위치한 Type Ia 초신성 호스트 은하의 분광관측

4. Univ. of Arizona (미국)

MMT 6.5m 망원경 사용

5. Yale Univ. (미국)

Yonsei-Yale Y2 Isochrone 구축, AGN feedback 관측

6. National Astronomical Observatory of Japan (일본)

SUBARU 8.2m 망원경을 사용하는 왜소은하 연구

7. Institut Astrophysique de Paris (프랑스)

은하 Warp 시뮬레이션 공동연구

8. Max Planck Institute for Astrophysics (독일)

슈퍼컴퓨터 시뮬레이션을 이용한 수치해석 공동연구 네트워크

9. Centre de Recherche Astrophysique de Lyon (프랑스)

SPHINX 수치실험을 이용한 국제공동 재이온화 연구

10. Univ. of Oxford (영국)

항성 피드백 및 별 생성 이론 모델 국제공동 연구