- Title
- The OTELO survey: A case study of [O III] lambda 4959,5007 emitters at z=0.83
- Creator
- Bongiovanni, Angel; Ramon-Perez, Marina; Perez Garcia, Ana Maria; Cervino, Miguel; Cepa, Jordi; Nadolny, Jakub; Perez Martinez, Ricardo; Alfaro, Emilio J.; Castaneda, Hector O.; Cedres, Bernabe; de Diego, Jose A.; Ederoclite, Alessandro; Fernandez-Lorenzo, Mirian; Gallego, Jesus; de Jesus Gonzalez, Jose; Gonzalez-Serrano, Jose Ignacio; Lara-Lopez, Maritza A.; Oteo Gomez, Ivan; Padilla Torres, Carmen P.; Pintos-Castro, Irene; Jones, D. Heath; Povic, Mirjana; Sanchez-Portal, M; Bland-Hawthorn, J; Cabrera-Lavers, A
- Relation
- Astronomy and Astrophysics Vol. 635, Issue 1 May 2020, no. C2
- Publisher Link
- http://dx.doi.org/10.1051/0004-6361/201833656
- Publisher
- EDP Sciences
- Resource Type
- journal article
- Date
- 2020
- Description
- Context: The OSIRIS Tunable Filter Emission Line Object (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. Aims: 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. Methods: The selection and analysis procedures of ELS candidates obtained using tunable filter 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. Results: From 541 preliminary emission-line source candidates selected around z = 0.8, a total of 184 sources were confirmed as [O III] emitters. Consistent with simulations, the minimum detectable line flux and equivalent width in this ELS sample are ∼5 × 10−19 erg s−1 cm2 and ∼6 Å, respectively. We are able to constrain the faint-end slope (α = −1.03 ± 0.08) of the observed LF ([O III]) at a mean redshift of 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⋆ < 1010 M⊙.
- Subject
- techniques: imaging spectroscopy; surveys; catalogs; galaxies: starburst; galaxies: active; galaxies: luminosity function
- Identifier
- http://hdl.handle.net/1959.13/1435003
- Identifier
- uon:39577
- Identifier
- ISSN:0004-6361
- Language
- eng
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