안녕하십니까.

오는 수요일(11월 6일) 오후 4:00에 아래와 같이 2024년 하반기 정규 콜로키움이 진행될 예정입니다.

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

발표자: 심준섭 박사 (ASIAA)

호스트: David Parkinson

장소: 장영실홀 331-2 및 원격 연결

일시: 11월 6일 (수) 오후 4:00

접속주소: https://zoom.us/j/92444602963?pwd=VXJzWE1zd3VkYmZ1SjRMeXRFQy9kQT09

교육학점: 천문연 소속 현장참석자의 경우 필수 0.5 학점 부여

제목: Probing parity violation in the early Universe using galaxy spins

초록: 

Recent 3-7σ detections of parity asymmetry in the observed galaxy distribution have spurred interest in searching for potential signals of primordial parity violation. In this talk, I will discuss the detectability of parity violation in primordial vector fossils using late-time galaxy spins. Using halo spins as proxies for galaxy spins, we examine the persistence of primordial parity asymmetry at low redshifts with N-body simulations. Our analysis introduces a novel approach to generate initial conditions with significant parity asymmetry without changing the initial matter power spectrum. Focusing on the helicity of the initial spin and halo spin vector fields, we detect substantial parity asymmetry in the initial spin field, with over 50% of this asymmetry surviving in the late-time halo spin field across a range of scales. I will discuss the cosmological implications of our findings and conclude with future opportunities from upcoming galaxy surveys.

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/92444602963?pwd=VXJzWE1zd3VkYmZ1SjRMeXRFQy9kQT09

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

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) 

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Dear all,

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

A conversation session with speakers is scheduled after the colloquium.

Speaker: Dr. Junsup Shim (ASIAA)

Host: David Parkinson

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

Time: November 6 (Wed) 4:00 pm 

Access: https://zoom.us/j/92444602963?pwd=VXJzWE1zd3VkYmZ1SjRMeXRFQy9kQT09

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

Title: Probing parity violation in the early Universe using galaxy spins

Abstract: 

Recent 3-7σ detections of parity asymmetry in the observed galaxy distribution have spurred interest in searching for potential signals of primordial parity violation. In this talk, I will discuss the detectability of parity violation in primordial vector fossils using late-time galaxy spins. Using halo spins as proxies for galaxy spins, we examine the persistence of primordial parity asymmetry at low redshifts with N-body simulations. Our analysis introduces a novel approach to generate initial conditions with significant parity asymmetry without changing the initial matter power spectrum. Focusing on the helicity of the initial spin and halo spin vector fields, we detect substantial parity asymmetry in the initial spin field, with over 50% of this asymmetry surviving in the late-time halo spin field across a range of scales. I will discuss the cosmological implications of our findings and conclude with future opportunities from upcoming galaxy surveys.

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/92444602963?pwd=VXJzWE1zd3VkYmZ1SjRMeXRFQy9kQT09

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.

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)