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Zhenya Zheng
Arizona State University and University of Science and Technology of China
NOAO South Visiting Astronomer
 

"Lyman-alpha Emitters at Redshift Z~4.5: Luminosity Functions, Clustering and Lyman-alpha Equivalent Width Distribution"
 

We present a spectroscopically confirmed Lyman alpha emitter (hereafter LAE) sample at redshift z~4.5 in the Extended Chandra Deep Field South region. With this sample (46 confirmed from 64 targets, which are selected from 112 candidates by Finkelstein et al. 2009), we analyze the 1) Lyman-alpha Luminosity functions; 2) spatial clustering; and 3) Lyman-alpha Equivalent Width distributions, both for photometric LAE candidates and for spectroscopically confirmed LAEs at redshift z~4.5. The Lyman-alpha luminosity function and spatial clustering for our z ~ 4.5 sample is consistent with others published in the literature during the redshift range of 3 < z < 6, while the Lyman-alpha luminosity functions in our two separate narrowband filters show a ~ 2 Sigma difference. The difference is comparable to differences among z=5.7 and z=6.5 LyA luminosity functions. We also did a Monte Carlo simulation of the Lyman-alpha equivalent width distribution. We found that the Lyman-alpha EW is independent of the Lyman-alpha line luminosity, and its distribution shows an exponential form.