标题： 高$z$LAEs和LBGs的同步搜索在SHARDS调查中 显示英文标题

标题： A simultaneous search for High-$z$ LAEs and LBGs in the SHARDS survey

摘要： 我们对GOODS-N区域的SHARDS调查中的Lyman Alpha Emitters (LAEs)和Lyman Break Galaxies (LBGs)进行了全面搜索。SHARDS是一项深度成像调查，使用10.4米Gran Telescopio Canarias (GTC)，在500至941纳米范围内采用了25个中等带滤光片。这是首次在大区域内系统地同时对LAEs和LBGs进行调查。我们选取了一个包含1558个源的样本；其中528个是LAEs。大多数源（1434个）显示了静止框架的紫外连续谱。其中少数（124个）是纯LAEs，在SHARDS中几乎未检测到连续谱。我们从$z\sim3.35$研究到$z\sim6.8$这些源，深入到了再电离时期。注意，仅使用一个或两个窄带滤光片的调查无法发现我们大多数LAEs中存在的静止框架紫外连续谱。我们推导了红移、恒星形成率（SFRs）、Ly$\alpha$等效宽度（EWs）和光度函数（LFs）。我们还研究了样本内的分组，发现了92对或小星系群，在相同红移下相隔不到60共动kpc。此外，我们将87个和55个紫外线选择的对象分别与已知的在$z=4.05$和$z=5.198$处的密度增强联系起来。最后，我们表明使用宽频带滤光片的调查容易引入许多不需要的源（$\sim20$%的干扰者），这意味着以前的研究可能高估了计算出的LFs，尤其是在暗端。 显示英文摘要

摘要： We have undertaken a comprehensive search for both Lyman Alpha Emitters (LAEs) and Lyman Break Galaxies (LBGs) in the SHARDS Survey of the GOODS-N field. SHARDS is a deep imaging survey, made with the 10.4 m Gran Telescopio Canarias (GTC), 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 $z\sim3.35$ up to $z\sim6.8$, 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 (SFRs), Ly$\alpha$ Equivalent Widths (EWs) 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 ($\sim20$% interlopers), which means that previous studies may be overestimating the calculated LFs, specially at the faint end.