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Search for Galaxies at z>4 from a Deep Multicolor Survey | | E. Giallongo
; S. Charlot
; S. Cristiani
; S. D’Odorico
; A. Fontana
; | | Date: |
31 May 1996 | | Abstract: | We present deep BVrI multicolor photometry in the field of the quasar BR1202-07 (z_{em}=4.694) aimed at selecting field galaxies at z>4. We compare the observed colors of the galaxies in the field with those predicted by spectral synthesis models including UV absorption by the intergalactic medium and we define a robust multicolor selection of galaxies at z>4. We provide spectroscopic confirmation of the high redshift QSO-companion galaxy (z=4.702) selected by our method. The first estimate of the surface density of galaxies in the redshift interval 4<z<4.5 is obtained for the same field, corresponding to a comoving volume density of ~ 10^{-3}$ Mpc$^{-3}. This provides a lower limit to the average star formation rate of the order of 10^{-2} Mo/yr/Mpc^{-3} at z~ 4.25. | | Source: | arXiv, astro-ph/9605196 | | Services: | Forum | Review | PDF | Favorites | |
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