Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21723106d&link_type=abstract
American Astronomical Society, AAS Meeting #217, #231.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The sum total of the energy released by the earliest era of star formation should show up today within the diffuse extragalactic background light (EBL), its signature peaking in the near-infrared. There is considerable controversy over estimates of the average EBL per steradian at wavelengths longward of 1 micron, over measurements of background fluctuations, and over the interpretation of the measurements. Resolving this controversy is important because the fluctuations in the near-infrared may very well contain important information about population III stars and the earliest era of star formation. We present an analysis of background fluctuations in observations of the Hubble Ultra Deep field and the GOODS field obtained with the Hubble Space Telescope Wide-Field Camera 3 (WFC3). The fluctuation signal provides a constraint on the slope of galaxy counts fainter than the levels of individual detection. The color dependence of the fluctuations provides a constraint on the redshift distribution of these very faint sources. In order to analyze the fluctuations, we use both Fourier and P(D) analyses, giving particular attention to systematic sources of error in WFC3. The feasibility of detecting these sources below the detection level in the forthcoming CANDELS survey will also be discussed.
Chary Ranga Ram
Cooray Asantha
Dolch Timothy
Ferguson Henry C.
Koekemoer Anton M.
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