안녕하십니까.

오는 수요일(5월 6일) 오후 4:00에 아래와 같이 2026년 상반기 정규 콜로키움이 진행될 예정입니다.

발표 후에는 연사와의 대화시간(5:00-5:40) 및 저녁 식사가 예정되어 있으니 많은 참여 부탁드립니다.

발표자: 장혜린 박사 (Radboud University)

호스트: 이창원

장소: 장영실홀 331-2 및 원격 연결

일시: 5월 6일 (수) 오후 4:00

접속주소: https://us06web.zoom.us/j/84840334355?pwd=3FUkcuaYwNQwscjoUSo3ulk6KPPo6x.1

교육학점: 천문연 소속 현장참석자의 경우 필수 0.5 학점 부여

제목: Unveiling dust in planet-forming disks with JWST/MIRI

초록: 

Protoplanetary disks are the birthplace of planets as the dust and gas grow into thousand-kilometer-sized bodies in a disk. These disks have various distributions in temperature, density, and chemical composition, which influence the initial conditions of planet formation. Dust is one of the key materials for forming habitable terrestrial planets in the warm inner disk, and warm dust in the disk surface emits strongly in the mid-IR. Thus, mid-IR spectroscopy provides clues to the primitive environments in which Earth-like planets are forming. This study investigates the composition and dynamics of silicate dust in protoplanetary disks through theoretical modeling and an analysis of mid-infrared (mid-IR) spectroscopic observations as one step toward understanding the formation of our Earth. Theoretical modeling for crystallization and dust transport in planet-forming disks helps interpret spectral data in terms of the spatial distribution of dust and suggests the need for small-dust depletion processes to understand disk evolution. In addition, James Webb Space Telescope/Mid-Infrared Instrument (JWST/MIRI) observations of planet-forming disks provide detailed dust and gas features that help constrain theoretical grain-shape models, iron content in dust grains, and dust evolution in disks. JWST/MIRI also explores disks around faint and cool central objects, such as very low-mass stars and brown dwarfs, and reveals detailed hydrocarbon gas emission features on top of silicate dust emission. These simultaneous observation on dust and gas provides insight into their interaction in disks. As these new observations open a new era in the study of planet-forming disks, further theoretical studies are needed to explain observed features that have not yet been fully understood.

진행언어: 영어

슬라이드언어: 영어

원격 접속 방법 :

A. 웹 브라우저: Chrome을 추천하며 아래 주소를 실행시 Zoom 구동을 위한 프로그램이 설치될 수 있음

B. 접속 주소: https://us06web.zoom.us/j/84840334355?pwd=3FUkcuaYwNQwscjoUSo3ulk6KPPo6x.1

C. 유의사항: 접속 후 "마이크는 뮤트로 설정" - 기본설정은 뮤트로 되어있음 > 질의 응답시간에는 마이크를 사용해서 질문 가능함

천문연 콜로키움 위원회 (김종수, 선광일, 이창원, 문홍규, 노혜림, 한정열)

운영위원회 (김진호, 홍준석, 석지연, 이재현, 유영삼, 송상헌)

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Dear all,

The KASI's regular colloquium is scheduled at May. 6, as shown below.

A conversation session with speakers and dinner are scheduled after the colloquium.

Speaker: Dr. Hyerin Jang (Radboud University)

Host: 이창원

Place: Jang Yeong-sil Hall 331-2 & Online

Time: May 6 (Wed) 4:00 pm 

Access: https://us06web.zoom.us/j/84840334355?pwd=3FUkcuaYwNQwscjoUSo3ulk6KPPo6x.1

KASI Educational credits: 0.5 educational credits are awarded to off-line attendees.

Title: Unveiling dust in planet-forming disks with JWST/MIRI

Abstract: 

Protoplanetary disks are the birthplace of planets as the dust and gas grow into thousand-kilometer-sized bodies in a disk. These disks have various distributions in temperature, density, and chemical composition, which influence the initial conditions of planet formation. Dust is one of the key materials for forming habitable terrestrial planets in the warm inner disk, and warm dust in the disk surface emits strongly in the mid-IR. Thus, mid-IR spectroscopy provides clues to the primitive environments in which Earth-like planets are forming. This study investigates the composition and dynamics of silicate dust in protoplanetary disks through theoretical modeling and an analysis of mid-infrared (mid-IR) spectroscopic observations as one step toward understanding the formation of our Earth. Theoretical modeling for crystallization and dust transport in planet-forming disks helps interpret spectral data in terms of the spatial distribution of dust and suggests the need for small-dust depletion processes to understand disk evolution. In addition, James Webb Space Telescope/Mid-Infrared Instrument (JWST/MIRI) observations of planet-forming disks provide detailed dust and gas features that help constrain theoretical grain-shape models, iron content in dust grains, and dust evolution in disks. JWST/MIRI also explores disks around faint and cool central objects, such as very low-mass stars and brown dwarfs, and reveals detailed hydrocarbon gas emission features on top of silicate dust emission. These simultaneous observation on dust and gas provides insight into their interaction in disks. As these new observations open a new era in the study of planet-forming disks, further theoretical studies are needed to explain observed features that have not yet been fully understood.

Language: English

Slide Language: English

Remote access procedure:

A. Web browser: Chrome - When executing the address below, a program for additional zoom operation can be installed.

B. Access: Go to https://us06web.zoom.us/j/84840334355?pwd=3FUkcuaYwNQwscjoUSo3ulk6KPPo6x.1

C. Notice: After join, Please mute your microphone. - The default setting is microphone mute. > After the presentation, during the Q&A session, you can use the microphone to ask questions.

KASI Colloquium committee (Jongsoo Kim, Kwang-Il Seon, Chang Won Lee, Hong-Kyu Moon, Hyerim Noh, Jeong-Yeol Han)

Working committee (Jinho Kim, Junseok Hong,  Ji Yeon Seok, Jaehyun Lee, Young Sam Yu, Sanghun Song)