Other
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5812s&link_type=abstract
HST Proposal ID #5812
Other
Hst Proposal Id #5812 Galaxies &Amp, Clusters
Scientific paper
We propose to apply statistical analyses to archival WFPC2 images in order to obtain important new constraints on the physical nature and clustering of the extragalactic background light {EBL}. Fluctuations in the EBL contain a wealth of information about the evolution and clustering of the population of faint galaxies and cosmology. Deep CCD images obtained by Tyson and others reveal a population of faint blue objects which may compromise a significant fraction of the EBL, but their nature is poorly understood. The integrated flux from galaxies to B=27 accounts for only 1/10 to 1/4 of the upper limits on the optical EBL. Multi-band deep WFPC2 images obtained as part of several programs are of the requisite quality to examine the properties of the light not assigned with high significance to discrete sources. At a redshift z 0.5, each WFPC2 field yields a 0.5h^-1 Mpc scale glimpse of the universe. If the EBL is clustered as strongly as the detected faint galaxies, the fluctuations will be strong enough to be detected; a null result would likewise be a significant discovery.
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