안녕하십니까.

오는 수요일(9월 25일) 오후 4:00에 아래와 같이 2024년 하반기 정규 콜로키움이 진행될 예정입니다.
발표 후에는 연사와의 대화시간(5:00-5:40) 및 저녁 식사가 예정되어 있으니 많은 참여 부탁드립니다.

발표자: 채종철 교수 (서울대학교)
호스트: 김종수 (권윤영)
장소: 장영실홀 331-2
일시: 9월 25일 (수) 오후 4:00
교육학점: 천문연 소속 현장참석자의 경우 필수 0.5 학점 부여

이번 콜로키움은 오프라인으로만 진행하므로 유의 하시기를 바랍니다

제목: Toward Understanding the Habitability of an Exoplanet Orbiting a Magnetically-active Star: Detecting Stellar Prominence Eruptions on a young sun EK Dra with BOES
초록: 
During the last decades, the heliospheric studies significantly contributed to our understanding of how the Sun’s magnetic acitivity affects the space weather of Earth in the short term and its climate change in the intermediate term. It now seems quite timely or urgent to extend this expersise to resolve two outstanding problems: 1) how the solar magnetic activity have affected the habitability of Earth and other planets in the long term, and 2) how the magnetic acivity of a star affects the habitability of an exoplanet orbiting around the star.  Resolving these two problems are intimately related to revealing of the fundamental principle and diversity of dynamo process in a variety of stars, planets and satellites. A useful tool for these scientific goals is comparative heliospheric studies: comparing Earth and Mars, comparing the present Sun-Earth system and the past system, comparing solar magnetic activity and stellar magnetic activity.  Comparing flares between the Sun and other stars has become very active in the last decade, and comparing prominence eruptions between the Sun and stars is becoming popular, as prominnece eruptions are regarded as a signature of coronal mass jections that can be observed from the ground. In this talk, I will review the recent BOES observations of flares and prominence eruptions on EK Dra that is regarded as a “young Sun”, in comparison with those on the Sun. We conclude that detecting prominence eruptions on a magnetically active star is much more difficult to detect flares, and would require high S/N spectroscopy as well as a reasonable model of radiation on the star during the eruptions.          

진행언어: 영어
슬라이드언어: 영어

2024년 하반기 천문연구원 콜로키움 일정
https://www.kasi.re.kr/kor/post/eng_colloquium?searchType=default&searchTxt=&searchExtr7=2024-fall
(위 일정은 연사분의 상황에 따라서 변경될 수 있습니다.)

천문연 콜로키움 위원회 (김종수, 선광일, 이창원, 문홍규, 노혜림, 한정열)
운영위원회 (김진호, 김영민, 이석호, 송영범, 오재석, 윤용민) 

----------

Dear all,

The KASI's regular colloquium is scheduled at Sep. 25, as shown below.
A conversation session with speakers and dinner are scheduled after the colloquium.

Speaker: Prof. Jongchul Chae (Seoul National University)
Host: 김종수 (권윤영)
Place: Jang Yeong-sil Hall 331-2
Time: September 25 (Wed) 4:00 pm 
KASI Educational credits: 0.5 educational credits are awarded to off-line attendees.

Note that this colloquium is offline only.

Title: Toward Understanding the Habitability of an Exoplanet Orbiting a Magnetically-active Star: Detecting Stellar Prominence Eruptions on a young sun EK Dra with BOES
Abstract: 
During the last decades, the heliospheric studies significantly contributed to our understanding of how the Sun’s magnetic acitivity affects the space weather of Earth in the short term and its climate change in the intermediate term. It now seems quite timely or urgent to extend this expersise to resolve two outstanding problems: 1) how the solar magnetic activity have affected the habitability of Earth and other planets in the long term, and 2) how the magnetic acivity of a star affects the habitability of an exoplanet orbiting around the star.  Resolving these two problems are intimately related to revealing of the fundamental principle and diversity of dynamo process in a variety of stars, planets and satellites. A useful tool for these scientific goals is comparative heliospheric studies: comparing Earth and Mars, comparing the present Sun-Earth system and the past system, comparing solar magnetic activity and stellar magnetic activity.  Comparing flares between the Sun and other stars has become very active in the last decade, and comparing prominence eruptions between the Sun and stars is becoming popular, as prominnece eruptions are regarded as a signature of coronal mass jections that can be observed from the ground. In this talk, I will review the recent BOES observations of flares and prominence eruptions on EK Dra that is regarded as a “young Sun”, in comparison with those on the Sun. We conclude that detecting prominence eruptions on a magnetically active star is much more difficult to detect flares, and would require high S/N spectroscopy as well as a reasonable model of radiation on the star during the eruptions.          

Language: English
Slide Language: English

2024B KASI Colloquium Schedule
https://www.kasi.re.kr/kor/post/eng_colloquium?searchType=default&searchTxt=&searchExtr7=2024-fall
(This schedule may vary depending on the speakers' schedule.)

KASI Colloquium committee (Jongsoo Kim, Kwang-Il Seon, Chang Won Lee, Hong-Kyu Moon, Hyerim Noh, Jeong-Yeol Han)
Working committee (Jinho Kim, Young-Min Kim, Seokho Lee, Youngbum Song, Jae Sok Oh, Yongmin Yoon)