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Title:
High redshift Lyman-alpha galaxies.
Authors:
Malhotra, S.; Rhoads, J.
Affiliation:
AA(Arizona State University, Tempe, United States)
Publication:
The Universe at z > 6, 26th meeting of the IAU, Joint Discussion 7, 17-18 August 2006, Prague, Czech Republic, JD07, #4
Publication Date:
08/2006
Origin:
IAU
Bibliographic Code:
2006IAUJD...7E...4M

Abstract

A strong Lyman-alpha line enables relatively easy detection of high redshift galaxies. Lyman-alpha galaxies are now known from z=3-6.6. No evolution is discerned in the Lyman-alpha line luminosity function in this redshift range. This implies that the intergalactic medium at z=6 is at least 50% ionized over more than 50% of the volume. Recent continuum detections of these galaxies from HST, MMT and Spitzer are now allowing us to address questions about the nature of these lyman-alpha emitters, their stellar populations and ages. We find that by and large the Lyman-alpha galaxies are young galaxies: dominated by stellar populations that are less than 25 Million years old.
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