Arrabal Haro, P.; Rodríguez Espinosa, J. M.; Muñoz-Tuñón, C.; Pérez-González, P. G.; Dannerbauer, H.; Bongiovanni, Á.; Barro, G.; Cava, A.; Lumbreras-Calle, A.; Hernán-Caballero, A.; Eliche-Moral, M. C.; Domínguez Sánchez, H.; Conselice, C. J.; Tresse, L.; Alcalde Pampliega, B.; Balcells, M.; Daddi, E.; Rodighiero, G.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 3, p.3740-3755
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8
2018
Citations
31
Refereed citations
27
Description
We have undertaken a comprehensive search for both Lyman alpha emitters
(LAEs) and Lyman break galaxies (LBGs) in the Survey for High-z
Absorption Red and Dead Sources (SHARDS) Survey of the Great
Observatories Origins Deep Survey North field. SHARDS is a deep imaging
survey, made with the 10.4 m Gran Telescopio Canarias, employing 25
medium band filters in the range from 500 to 941 nm. This is the first
time that both LAEs and LBGs are surveyed simultaneously in a systematic
way in a large field. We draw a sample of 1558 sources; 528 of them are
LAEs. Most of the sources (1434) show rest-frame UV continua. A minority
of them (124) are pure LAEs with virtually no continuum detected in
SHARDS. We study these sources from z ˜ 3.35 up to z˜ 6.8,
well into the epoch of reionization. Note that surveys done with just
one or two narrow band filters lack the possibility to spot the
rest-frame UV continuum present in most of our LAEs. We derive
redshifts, star formation rates, Lyα equivalent widths, and
luminosity functions (LFs). Grouping within our sample is also studied,
finding 92 pairs or small groups of galaxies at the same redshift
separated by less than 60 comoving kpc. In addition, we relate 87 and 55
UV-selected objects with two known overdensities at z = 4.05 and z =
5.198, respectively. Finally, we show that surveys made with broad-band
filters are prone to introduce many unwanted sources (˜20 per cent
interlopers), which means that previous studies may be overestimating
the calculated LFs, specially at the faint end.
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