The Nature of z=3 Lyman-Alpha Emitters

Details The Nature of z=3 Lyman-Alpha Emitters The Nature of z=3 Lyman-Alpha Emitters

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11177g&link_type=abstract

HST Proposal ID #11177. Cycle 16

Mathematics

Logic

Scientific paper

The advent of large mosaic CCD cameras on 4 -- 8 m class telescopes has recently led to a revolution in our ability to detect primordial galaxies. Today, large numbers of strong Ly-alpha emitters LAEs are being discovered between 2.4 < z < 6. These are important objects: not only do they sample a part of the galaxy luminosity function that is inaccessible to the Lyman-break technique, but they also tend to be younger and less chemically evolved. In fact, the LAEs now being found are currently our best candidates for galaxies in the act of formation. To investigate the properties of this class of objects, we have conducted an extremely deep narrow-band 5000 Angstrom; FWHM = 50 Angstrom and broad-band UBVRIzJK survey of the Extended Chandra Deep Field South, and have identified a homogeneous sample of strong Ly-alpha emitters at z = 3.11. Twenty-seven of these objects are located within the region surveyed by Great Observatories Origins Deep Survey GOODS and have detailed morphological information available from the rest-frame ultraviolet. We propose 0.2" resolution narrow-band imaging of 11 of our LAEs using the F502N filter of WFPC2. By comparing the Ly-alpha and rest-frame UV continuum morphologies of these galaxies, we will be able to look for the presence of outflows, constrain their dust content, and test whether these objects are truly primordial galaxies.;

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