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19 April 2024 |
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The OTELO survey. A case study of [O III]4959,5007 emitters at <z> = 0.83 | | Ángel Bongiovanni
; Marina Ramón-Pérez
; Ana María Pérez García
; Miguel Cerviño
; Jordi Cepa
; Jakub Nadolny
; Ricardo Pérez Martínez
; Emilio J. Alfaro
; Héctor Castañeda
; Bernabé Cedrés
; José A. de Diego
; Alessandro Ederoclite
; Mirian Fernández-Lorenzo
; Jesús Gallego
; J. Jesús González
; J. Ignacio González-Serrano
; Iván Oteo Gómez
; Carmen P. Padilla Torres
; Irene Pintos-Castro
; Mirjana Pović
; Miguel Sánchez-Portal
; D. Heath Jones
; Joss Bland-Hawthorn
; Antonio Cabrera-Lavers
; | | Date: |
20 Feb 2020 | | Abstract: | The OTELO survey is a very deep, blind exploration of a selected region of
the Extended Groth Strip and is designed for finding emission-line sources
(ELSs). The survey design, observations, data reduction, astrometry, and
photometry, as well as the correlation with ancillary data used to obtain a
final catalogue, including photo-z estimates and a preliminary selection of
ELS, were described in a previous contribution. Here, we aim to determine the
main properties and luminosity function (LF) of the [O III] ELS sample of OTELO
as a scientific demonstration of its capabilities, advantages, and
complementarity with respect to other surveys. The selection and analysis
procedures of ELS candidates obtained using tunable filter (TF) pseudo-spectra
are described. We performed simulations in the parameter space of the survey to
obtain emission-line detection probabilities. Relevant characteristics of [O
III] emitters and the LF([O III]), including the main selection biases and
uncertainties, are presented. A total of 184 sources were confirmed as [O III]
emitters at a mean redshift z=0.83. The minimum detectable line flux and
equivalent width (EW) in this ELS sample are $sim$5 $ imes$ 10$^{-19}$ erg
s$^{-1}$ cm$^{2}$ and $sim$6 AA, respectively. We are able to constrain the
faint-end slope ($alpha = -1.03pm0.08$) of the observed LF([O III]) at
z=0.83. This LF reaches values that are approximately ten times lower than
those from other surveys. The vast majority (84\%) of the morphologically
classified [O III] ELSs are disc-like sources, and 87\% of this sample is
comprised of galaxies with stellar masses of M$_star$ $<$ 10$^{10}$
M$_{odot}$. | | Source: | arXiv, 2002.8978 | | Services: | Forum | Review | PDF | Favorites | |
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