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2022년 11월 3일 세미나 공고문
2022년 11월 3일 세미나 공고문
작성자 천문우주과학과
조회수 222 등록일 2022.10.24

일시:  2022년 11월 3일 목요일 오후 3시 zoom
         (https://cnu-ac-kr.zoom.us/j/81951946586, 암호: 032999)  


연사: 정하은 박사님(University of Arizona)

 

제목: Aspera: The UV Small-Satellite mission for mapping warm-hot gas in nearby galaxy halos 

 

초록:  

Aspera is a new NASA UV Small-Satellite mission to detect and map the warm-hot phase halo gas (10^5-10^6 K) around nearby galaxies, led by the University of Arizona (PI: Dr. Carlos Vargas). The warm-hot phase gas occupies a considerable fraction of the galaxy baryonic mass budget. However, its amount and distribution are poorly unknown observationally. Aspera is specifically designed to observe those gas via UV spectroscopic observation of O VI line emission at 103.4 nm, a proxy of hot phase gas. The high sensitivity of Aspera down to 5E-19 ergs/s/cm^2/arcsec^2 and a large field of view of 30 arcsec x 1 degrees allow efficient detection of the faint O VI line emission. 

Aspera has been selected as one of the inaugural NASA Astrophysics Pioneers missions in early 2021. It has passed its conceptual design review and is now in the preliminary design phase, with a launch date of mid-2025. Here we report the status of the Aspera mission.


관련 논문:
- Revisiting FUSE O VI Emission in Galaxy Halos
- Aspera: the UV SmallSat telescope to detect and map the warm-hot gas phase in nearby galaxy halos