The very high redshift component of the OTELO survey

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

Advertised on:
3
2017
Number of authors
6
IAC number of authors
4
Citations
0
Refereed citations
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.