z˜6 i-Dropout Galaxies in the Subaru/XMM-Newton Deep Field

Details z˜6 i-Dropout Galaxies in the Subaru/XMM-Newton Deep Field z˜6 i-Dropout Galaxies in the Subaru/XMM-Newton Deep Field

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jkas...38..179o&link_type=abstract

Journal of the Korean Astronomical Society, vol. 38, no. 2, pp. 179-182

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5

Cosmology: Observations, Early Universe, Galaxies: Evolution, Galaxies: Formation

Scientific paper

We conducted an extremely wide field survey of z˜ 6 Lyman break galaxies (LBGs) to precisely derive their bright end surface density overcoming the bias due to cosmic variance. We selected out LBG candidates in the Subaru/XMM-Newton Deep Survey Field (SXDS) over the total of ˜1.0 deg^2 sky area down to z'AB = 26.0 (⪆ 3σ, 2.0 arcsec aperture) using i' - z' > 1.5 color cut. This sample alone is likely to be contaminated by M/L/T dwarfs, low-z elliptical galaxies, and z˜6 quasars. To eliminate these interlopers, we estimated their numbers using an exponential disk star count model, catalogs of old ellipticals in the SXDS and other field, and a z˜ 6 quasar luminosity function. The finally derived surface density of z˜ 6 LBGs was 165 mag-1 deg-2 down to z'AB = 26.0 and shows good agreement with previous results from the narrower field survey of HST GOODS.

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