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27 April 2024 |
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Photometric redshifts and selection of high redshift galaxies in the NTT and Hubble Deep Fields | | A. Fontana
; S.D’Odorico
; F. Poli
; E. Giallongo
; S. Arnouts
; S. Cristiani
; A. Moorwood
; P. Saracco
; | | Date: |
11 Sep 2000 | | Subject: | astro-ph | | Affiliation: | Rome Obs), S.D’Odorico (ESO), F. Poli (Rome Obs), E. Giallongo (Rome Obs), S. Arnouts (ESO), S. Cristiani (STECF-ESO), A. Moorwood (ESO), P. Saracco (Merate Obs | | Abstract: | We present and compare in this paper new photometric redshift catalogs of the galaxies in three public fields: the NTT Deep Field, the HDF-N and the HDF-S. Photometric redshifts have been obtained for thewhole sample, by adopting a $chi^2$ minimization technique on a spectral library drawn from the Bruzual and Charlot synthesis models, with the addition of dust and intergalactic absorption. The accuracy, determined from 125 galaxies with known spectroscopic redshifts, is $sigma_zsim 0.08 (0.3)$ in the redshift intervals $z=0-1.5 (1.5-3.5)$. The global redshift distribution of I-selected galaxies shows a distinct peak at intermediate redshifts, z~0.6 at I_{AB}<26 and z~0.8 at I_{AB}<27.5 followed by a tail extending to z~6. We also present for the first time the redshift distribution of the total IR-selected sample to faint limits ($Ks leq 21$ and $Jleq22$). It is found that the number density of galaxies at 1.255 candidates in the HDF filter set and that the 4 brightest candidates at $z>5$ in the HDF-S are indeed most likely M stars. (ABRIDGED) | | Source: | arXiv, astro-ph/0009158 | | Services: | Forum | Review | PDF | Favorites | |
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