안녕하십니까.

오는 수요일(7월 22일) 오후 4:00에 아래와 같이 2026년 상반기 정규 콜로키움이 진행될 예정입니다.

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

발표자: 김윤수 박사 (Princeton Center for Theoretical Science)

호스트: 김진호

장소: 장영실홀 331-2 및 원격 연결

일시: 7월 22일 (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: Monster shocks and transient black hole pulsars from neutron star-black hole mergers

초록: 

An excitation of a compact object magnetosphere can lead to a strongly radiating shockwave (dubbed as a "monster shock") which can power high-energy electromagnetic bursts. From GRMHD simulations of the merger of a high mass ratio neutron star-black hole binary, we observe that a strong disturbance in the circumbinary magnetosphere from the plunge of a magnetized neutron star to a black hole can develop into monster shocks. The post-merger magnetosphere around the remnant black hole undergoes a rapid transition into an inclined split-monopole configuration, and is dissipated by magnetic reconnections on rotating current sheets. We show that the balding remnant black hole exhibits a recently proposed "black hole pulsar" state, launching an exponentially decaying striped wind of plasma. Our study reveals a novel type of shock-powered and reconnection-driven transients associated with compact binary mergers.

진행언어: 한국어

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, 한정열, 홍성욱)

운영위원회 (김진호, 홍준석, 석지연, 이재현, 유영삼, 송상헌)

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Dear all,

The KASI's regular colloquium is scheduled at Jul. 22, as shown below.

A conversation session with speakers is scheduled after the colloquium.

Speaker: Dr. Yoonsoo Kim (Princeton Center for Theoretical Science)

Host: Jinho Kim

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

Time: July 22 (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: Monster shocks and transient black hole pulsars from neutron star-black hole mergers

Abstract: 

An excitation of a compact object magnetosphere can lead to a strongly radiating shockwave (dubbed as a "monster shock") which can power high-energy electromagnetic bursts. From GRMHD simulations of the merger of a high mass ratio neutron star-black hole binary, we observe that a strong disturbance in the circumbinary magnetosphere from the plunge of a magnetized neutron star to a black hole can develop into monster shocks. The post-merger magnetosphere around the remnant black hole undergoes a rapid transition into an inclined split-monopole configuration, and is dissipated by magnetic reconnections on rotating current sheets. We show that the balding remnant black hole exhibits a recently proposed "black hole pulsar" state, launching an exponentially decaying striped wind of plasma. Our study reveals a novel type of shock-powered and reconnection-driven transients associated with compact binary mergers.

Language: Korean

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, Jeong-Yeol Han, Sungwook Hong)

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