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  Galaxy seminar  

   

Title: Lyman Alpha Emitter Galaxies in the Near and Far Universe

Speaker:  Zhenya Zheng (Pontificia Universidad Catolica de Chile) 

TimeWednesday, 3:00 pm, Jul 15     

Location: Room 1714    

Abstract: The Lyman Alpha emission line is the strongest emission line in the spectra of typical star-forming galaxies. Searching for Lyman Alpha Emitter Galaxies (LAEs) will help us study the formation and  evolution of galaxies, map the large-scale structure in the universe, and more importantly, probe the cosmic reionization and search for first generation galaxies. In this talk, I’d like to introduce the current narrowband surveys from redshift 2 to 8.8, including our published work on LAEs at z=2.8 and 4.5, and on-going projects about searching for LAEs at z= 7, 7.7 and 8.8 in the epoch of cosmic reionization.  We also reveal the secret of Lya escape from the HST spectra of local LAE analogs— the “Green Pea Galaxies” at z~0.3. It tells us that low column density, low metallicity,and outflows are the main factors for Lya escaping.   

 

 
About
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Research Center for Galaxy and Cosmology is the division engaging on the astrophysical research in Shanghai Astronomical Observatory. The research area includes cosmology, large scale structure, galaxy formation and evolution, the active galactic nucleus and compact objects, the star cluster and the structure of the Milk Way etc.

CGC participates in many international sky survey projects, including the LAMOST sky survey, the Sloan Digital Sky Survey IV ,BigBoss,LSST etc. CGC maintains close partnerships with many astronomical   research institutes.

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