Résumé / Abstract Seminaire_IAP
« Lyman alpha emission from high-redshift galaxies and their circum-galactic medium - a joint view from MUSE and simulations »

Jérémy Blaizot
Centre Recherches Astron. Lyon, Obs. Lyon (CRAL) (Lyon, France)

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.
vendredi 16 juin 2017 - 11:00
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage