Lyman alpha emission from high-redshift galaxies and their circum-galactic medium - a joint view from MUSE and simulations.
, 2018-04-09 09:46:45
- 조회 수
- 61
- 세미나 연사
- Dr. Jeremy Blaizot(Observertoire de Lyon )
- 세미나 장소
- 과학관B102
- 연도
- 2018
- 월 / 일
- 4/3
- 시간
- 16:00
Title: Lyman alpha emission from high-redshift galaxies and their circum-galactic medium - a joint view from MUSE and simulations.
Abstract:
The Lyman-alpha (Lya) line has become a central tool to understand the distant Universe. It allows us to probe the late stages of reionisation, its spectral shape suggests the presence of outflows in most high-z galaxies, and its intensity allows us to survey extremely faint objects quasi routinely. With its unprecedented sensitivity, MUSE has opened a yet new window on high redshift galaxies by allowing us to measure significantly extended Lya emission from the circum-galactic medium (CGM) of individual Lyman-alpha emitters (LAEs) at z > 3.
The extreme complexity of Lyman-alpha radiation transfer through the ISM and CGM of distant galaxies is however a major limit in our ability to interpret these observations. I will review recent results from MUSE on high-redshift Lyman-alpha emitters and their CGM. I will then present ongoing work with numerical simulations of galaxy formation and numerical Lya radiation transfer which help us build an interpretation framework for these observations.
Abstract:
The Lyman-alpha (Lya) line has become a central tool to understand the distant Universe. It allows us to probe the late stages of reionisation, its spectral shape suggests the presence of outflows in most high-z galaxies, and its intensity allows us to survey extremely faint objects quasi routinely. With its unprecedented sensitivity, MUSE has opened a yet new window on high redshift galaxies by allowing us to measure significantly extended Lya emission from the circum-galactic medium (CGM) of individual Lyman-alpha emitters (LAEs) at z > 3.
The extreme complexity of Lyman-alpha radiation transfer through the ISM and CGM of distant galaxies is however a major limit in our ability to interpret these observations. I will review recent results from MUSE on high-redshift Lyman-alpha emitters and their CGM. I will then present ongoing work with numerical simulations of galaxy formation and numerical Lya radiation transfer which help us build an interpretation framework for these observations.