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arXiv 2103.03645astro-ph.GA
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OTELO调查:[ OII ]发射体在= 1.43时光度函数的暗端<z>

The OTELO survey: Faint end of the luminosity function of [OII] emitters at <z>= 1.43

Bernabé Cedrés, Ángel Bongiovanni, Miguel Cerviño, Jakub Nadolny, Jordi Cepa, José A. de Diego, Ana María Pérez García, Jesús Gallego, Maritza A. Lara-López, Mi… 展开作者

Bernabé Cedrés, Ángel Bongiovanni, Miguel Cerviño, Jakub Nadolny, Jordi Cepa, José A. de Diego, Ana María Pérez García, Jesús Gallego, Maritza A. Lara-López, Miguel Sánchez-Portal, J. Ignacio González-Serrano, Emilio J. Alfaro, Rocío Navarro Martínez, Ricardo Pérez Martínez, J. Jesús González, Carmen P. Padilla Torres, Héctor O. Castañeda, Mauro González

摘要:

本文旨在研究OTELO巡天中所探测到的[OII]辐射体的主要性质和光度函数(LF),以便在$z\sim1.43$上解释低质量星系的恒星形成过程,并限制LF的暗端。在这里,我们描述的选择方法和分析从窄带扫描技术获得的发射器。此外,我们提出了几个相关的性质的发射体和讨论的选择偏差和不确定性的LF和恒星形成率密度(SFRD)的确定。我们从332个候选排放源的初步名单中确认了60个排放源。大约93%的发射体具有在$10^{8}<M_{*}/{\rm M_{\odot}}<10^{9}$范围内的质量。我们所有的发射体都被归类为晚型星系,与OTELO调查的其他发射体相比,$(u-v)$ \的值较低。我们发现,宇宙方差强烈影响的LF的归一化($ϕ^*$),并解释了我们的结果相比,从调查中获得的差异大得多的卷。然而,我们能够确定LF的弱端斜率,即$α=-1.42\pm0.06$,通过将LF采样到低于先前工作的$\sim1$ \,dex。我们提出了我们的计算的SFRD我们的样品,并将其与以前的研究从文献中获得的值进行比较。

英文摘要:

In this paper, we aim to study the main properties and luminosity function (LF) of the [OII] emitters detected in the OTELO survey in order to characterise the star formation processes in low-mass galaxies at $z\sim1.43$ and to constrain the faint-end of the LF. Here, we describe the selection method and analysis of the emitters obtained from narrow-band scanning techniques. In addition, we present several relevant properties of the emitters and discuss the selection biases and uncertainties in the determination of the LF and the star formation rate density (SFRD). We confirmed a total of 60 sources from a preliminary list of 332 candidates as [OII] emitters. Approximately 93% of the emitters have masses in the range of $10^{8}<M_{*}/{\rm M_{\odot}}<10^{9}$. All of our emitters are classified as late-type galaxies, with a lower value of $(u-v)$\, when compared with the rest of the emitters of the OTELO survey. We find that the cosmic variance strongly affects the normalisation ($ϕ^*$) of the LF and explains the discrepancy of our results when compared with those obtained from surveys of much larger volumes. However, we are able to determine the faint-end slope of the LF, namely, $α=-1.42\pm0.06$, by sampling the LF down to $\sim1$\,dex lower than in previous works. We present our calculation of the SFRD of our sample and compare it to the value obtained in previous studies from the literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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