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.

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