Bibcode
Bongiovanni, A.; Ramón-Pérez, M.; Pérez García, A. M.; Cepa Nogué, J.; Cervino Saavedra, M.; OTELO Team
Bibliographical reference
Highlights on Spanish Astrophysics IX, Proceedings of the XII Scientific Meeting of the Spanish Astronomical Society held on July 18-22, 2016, in Bilbao, Spain, ISBN 978-84-606-8760-3. S. Arribas, A. Alonso-Herrero, F. Figueras, C. Hernández-Monteagudo, A. Sán'chez-Lavega, S. Pérez-Hoyos (eds.), p. 276-276
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3
2017
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0
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0
Description
Lyman-α emitters (LAEs) and Lyman-break galaxies (LBGs) stand out
among the most used tools to study the galaxy formation in the early
universe. Despite they constitute truly evolutionary probes of galaxy
formation, evidence suggests that LAEs & LBGs correspond to
different kinds of extragalactic sources regarding star formation modes,
spatial distribution, gas and dust content, nuclear activity, etc.,
apart from the way they are detected. Such differences gain special
significance near the reionization redshift. The OSIRIS Tunable Filter
Emission-Line -OTELO- project is a very deep, 2D-spectroscopic (R
˜ 700) blind tomography, defined on a spectral window of 21 nm and
centered on 915 nm, which aimsto obtains spectra of all emission line
sources in the field, sampling unrelated cosmological volumes between z
= 0.4 and 6 (see contributions of Cepa et al., Ramón-Pérez
et al. and Nadolny et al. in this Meeting). Data from the OTELO's first pointing
(Extended Groth Strip, EGS) and ancillary have been already gathered and
reduced. Starting from a sample of 150+ candidates to z > 6 galaxies
in the survey in a color diagnostic diagram, we have isolated 7
preliminary LAE candidates by hybrid SED fitting and emission line
analysis, including considerations about possible interlopers (e.g. cool
Galactic stars and z ˜ 1.3 post-starburst galaxies). A promising
LAE candidate at z = 6.531 is shown in this contribution.