Two Lensed Ly-A Emitters at z ~ 5
Abstract
We propose 3.6 micron imaging of two newly discovered Ly-A emitters at zD5.0 and 5.2. These spectroscopically confirmed sources, located behind a pair of strong lensing clusters from the SDSS Giant Arcs Survey, are lensed and appear an order of magnitude brighter than the small samples of typical Ly-A emitters previously found at high redshifts in ultra-deep fields. As such they offer the opportunity for detailed individual study which these other sources do not, and can be well measured in modest (less than 1 hour) total integrations. The proposed observation provides a critical measure of the presence or absence of older stars in these objects, and hence helps constrain stellar mass, and in conjunction with ground-based near-IR imaging will yield a detailed picture of the spectral energy distribution of these sources from rest-frame UV to optical wavelengths.
- Publication:
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Spitzer Proposal
- Pub Date:
- April 2009
- Bibcode:
- 2009sptz.prop60158G