Jeong‐Eun Lee
경희대학교 물리학과 · 물리·천문학
정은 Lee 교수의 연구실은 천체물리학과 나노소재 공학을 융합한 다학제적 연구를 수행합니다. 주요 연구 분야는 별 형성의 초기 단계에서의 분자화학적 진화와 분광적 관측을 통한 천체 물질의 물리적 조건 분석이며, 동시에 그래핀을 활용한 고온 안정성 향상 기술을 통해 유기 반도체 트랜지스터의 성능을 극대화하는 나노전자소자 연구도 진행하고 있습니다. 이는 천체에서의 화학 진화 이해와 나노소재 응용 기술의 융합을 목표로 합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Understanding the chemical evolution in star-forming cores is a necessary pre-condition to correctly assess physical conditions when using molecular emission. We follow the evolution of chemistry and molecular line profiles through the entire star formation process, including a self-consistent treatment of dynamics, dust continuum radiative transfer, gas energetics, chemistry, molecular excitation, and line radiative transfer. In particular, the chemical code follows a gas parcel as it falls tow
We have compared molecular line emission to dust continuum emission and modeled molecular lines using Monte Carlo simulations in order to study the depletion of molecules and the ionization fraction in three preprotostellar cores, L1512, L1544, and L1689B. L1512 is much less dense than L1544 and L1689B, which have similar density structures. L1689B has a different environment from those of L1512 and L1544. We used density and temperature profiles, calculated by modeling dust continuum emission i
We present the four-year survey results of monthly submillimeter monitoring of eight nearby ($< 500 $pc) star-forming regions by the JCMT Transient Survey. We apply the Lomb-Scargle Periodogram technique to search for and characterize variability on 295 submillimeter peaks brighter than 0.14 Jy beam$^{-1}$, including 22 disk sources (Class II), 83 protostars (Class 0/I), and 190 starless sources. We uncover 18 secular variables, all of them protostars. No single-epoch burst or drop events and no
Abstract We present a library of high-resolution ( R ≡ λ /Δ λ ∼ 45,000) and high signal-to-noise ratio (S/N ≥ 200) near-infrared spectra for stars of a wide range of spectral types and luminosity classes. The spectra were obtained with the Immersion GRating INfrared Spectrograph covering the full range of the H (1.496–1.780 μ m) and K (2.080–2.460 μ m) atmospheric windows. The targets were primarily selected for being MK standard stars covering a wide range of effective temperatures and surface
The excellent impermeability of graphene was exploited to produce stable ohmic contact at the interface between Al metal and a semiconducting indium gallium zinc oxide (IGZO) layer after high-temperature annealing. Thin film transistors (TFTs) were fabricated with and without a graphene interlayer between the Al metal and the IGZO channel region. Metal contact at the interface prepared without a graphene interlayer showed serious instabilities in the IGZO TFT under thermal annealing; however, th
