안녕하십니까.

이번주 수요일(4월 5일) 오전 10:30에 아래와 같이 정규 콜로퀴움이 진행될 예정입니다. 많은 참여 부탁드립니다.

발표자 : 김진영 박사 (Steward Observatory, University of Arizona)

호스트 : 이진희 (대형망원경사업단), Garreth Martin (광학천문본부)

장소 : 장영실홀 331-2 및 원격 연결

일시 : 4월 5일 (수) 오전 10:30

접속주소 : https://zoom.us/j/93209513727?pwd=YUxsRjNaVUg3Z3p4VmxPMUZrOU1YZz09

교육학점: 천문연 소속 현장참석자의 경우 필수 0.5 학점 부여

제목: Orion's Stellar Nurseries: Probing Diverse External UV Radiation Environments

초록: Planets form in protoplanetary disks around young stars. As most young stars form in cluster environments, planet forming disks are exposed to various levels of external UV radiation. Such external UV radiation plays an important role in protoplanetary disk evolution affecting disk lifetime, disk properties, and planet formation. Photoevpaorating protoplanetary disks (proplyds) are found near O stars in the Orion Nebula Cluster (ONC), which harbors over hundreds of them. We have identified more proplyds around two other young star forming regions in Orion A and B clouds: NGC 1977 and NGC 2024. Proplyds are found mostly in Orion in vicinity of O stars (ONC), but as low as B1V star (NGC 1977) providing diverse ranges of UV environments. In this talk, I will present recent work on properties of Trapezium cluster at the heart of Orion Nebula, and discovery of proplyds in NGC 1977 and NGC 2024. These clusters provide excellent laboratory to study interplay between UV radiation from massive stars and protplanetary disks in strong (ONC, NGC 2024) and intermediate (NGC 1977) UV radiation environments. NGC 2024 is unique as it provides the youngest age among the three regions (age <0.5-1 Myr), while NGC 1977 provides the weakest UV environment where proplyds are discovered. I will also present our kinematic studies of the proplyds and non-proplyd young stars in ONC and NGC 1977, and explore possible explanations for "proplyd life time problem".

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://zoom.us/j/93209513727?pwd=YUxsRjNaVUg3Z3p4VmxPMUZrOU1YZz09
C. 유의사항 : 접속 후 "마이크는 뮤트로 설정" - 기본설정은 뮤트로 되어있음
    > 질의 응답시간에는 마이크를 사용해서 질문 가능함

2023년 상반기 KASI 콜로퀴움 일정

https://www.kasi.re.kr/kor/post/eng_colloquium

(위 일정은 연사분의 상황에 따라서 변경될 수 있습니다.)

천문연 콜로퀴움 위원회 (홍성욱, 최지훈, 오희영) 드림

Dear all,

KASI's regular colloquium is scheduled for April 5. 

Speaker : Dr. Jinyoung Serena Kim (Steward Observatory, University of Arizona)

Host : Jinhee Lee & Garreth Martin

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

Time : April 5 (Wed) 10:30 am 

Access: https://zoom.us/j/93209513727?pwd=YUxsRjNaVUg3Z3p4VmxPMUZrOU1YZz09

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

Title: Orion's Stellar Nurseries: Probing Diverse External UV Radiation Environments

Abstract: Planets form in protoplanetary disks around young stars. As most young stars form in cluster environments, planet forming disks are exposed to various levels of external UV radiation. Such external UV radiation plays an important role in protoplanetary disk evolution affecting disk lifetime, disk properties, and planet formation. Photoevpaorating protoplanetary disks (proplyds) are found near O stars in the Orion Nebula Cluster (ONC), which harbors over hundreds of them. We have identified more proplyds around two other young star forming regions in Orion A and B clouds: NGC 1977 and NGC 2024. Proplyds are found mostly in Orion in vicinity of O stars (ONC), but as low as B1V star (NGC 1977) providing diverse ranges of UV environments. In this talk, I will present recent work on properties of Trapezium cluster at the heart of Orion Nebula, and discovery of proplyds in NGC 1977 and NGC 2024. These clusters provide excellent laboratory to study interplay between UV radiation from massive stars and protplanetary disks in strong (ONC, NGC 2024) and intermediate (NGC 1977) UV radiation environments. NGC 2024 is unique as it provides the youngest age among the three regions (age <0.5-1 Myr), while NGC 1977 provides the weakest UV environment where proplyds are discovered. I will also present our kinematic studies of the proplyds and non-proplyd young stars in ONC and NGC 1977, and explore possible explanations for "proplyd life time problem".

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://zoom.us/j/93209513727?pwd=YUxsRjNaVUg3Z3p4VmxPMUZrOU1YZz09

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.

2023A KASI Colloquium Schedule

https://www.kasi.re.kr/kor/post/eng_colloquium

(This schedule may be changed according to the situation of the speaker.)

KASI Colloquium committee (Sungwook E. Hong, Jihoon Choi, Heeyoung Oh)