RELICS: Properties of z ≥ 5.5 Galaxies Inferred from Spitzer and Hubble Imaging, Including A Candidate z ∼ 6.8 Strong [O iii] emitter-猫眼课题宝

DOI：

10.3847/1538-4357/abe533

发表时间：

2021-04

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

V. Strait;M. Bradač;D. Coe;B. Lemaux;A. Carnall;L. Bradley;D. Pelliccia;K. Sharon;A. Zitrin;A. Acebrón;C. Neufeld;F. Andrade-Santos;R. Avila;B. Frye;G. Mahler;M. Nonino;S. Ogaz;M. Oguri;M. Ouchi;R. Paterno-Mahler;D. Stark;R. Mainali;P. Oesch;M. Trenti;D. Carrasco;W. Dawson;C. Jones;K. Umetsu;B. Vulcani

我们给出了2076≲z≲8星系的物理性质(包括恒星质量、年龄和恒星形成率)的约束条件，这些约束来自再电离透镜星系团调查(遗迹)和斯皮策遗迹调查。我们用T-PHOT进行了光度测量，并用Eazy和风笛进行了光谱能量分布拟合。在我们可以成功测量(或限制)斯皮策通量的207个候选星中，23个被降级为可能的z&lt；4。在高z候选星中，我们发现本征恒星质量在1×106M⊙到4×109M⊙之间，静止框架UV绝对星等在−22.6Mag和−14.5mag之间。虽然我们的样本主要由LmUV/LmUV*和lt；1星系组成，但它也延伸到LmUV/LmUV*∼2。我们的样本跨越了恒星质量和恒星形成率的∼4个数量级，并展示了从最年轻到最老的年龄范围。我们重点介绍了11个z≥6.5星系，这些星系在斯皮策/irac成像中被探测到，其中一些星系显示出演化的恒星群体、星云发射线的巨大贡献和/或尘埃的某种组合的证据。其中包括PLCKG287+32-2013，它是已知的最亮的z∼7候选者之一(AB MAG24.9，1.6μm)，斯皮策3.6μm通量超标，表明[O III]+H-β发射很强(∼1000üRest-Frame相当于宽度)。我们讨论了我们的样品的可能用途和局限性，并给出了一个公开的哈勃+斯皮策光度学目录以及样品中所有物体的物理性质估计。由于它们明显的亮度、高红移和恒星群的多样性，这些天体是詹姆斯·韦伯太空望远镜后续行动的极好目标。

We present constraints on the physical properties (including stellar mass, age, and star formation rate) of 207 6 ≲ z ≲ 8 galaxy candidates from the Reionization Lensing Cluster Survey (RELICS) and Spitzer-RELICS surveys. We measure photometry using T-PHOT and perform spectral energy distribution fitting using EAzY and BAGPIPES. Of the 207 candidates for which we could successfully measure (or place limits on) Spitzer fluxes, 23 were demoted to likely z < 4. Among the high-z candidates, we find intrinsic stellar masses between 1 × 106 M ⊙ and 4 × 109 M ⊙, and rest-frame UV absolute magnitudes between −22.6 and −14.5 mag. While our sample is mostly comprised of LmUV/LmUV*<1 galaxies, it extends to LmUV/LmUV*∼2 . Our sample spans ∼4 orders of magnitude in stellar mass and star formation rates, and exhibits ages that range from maximally young to maximally old. We highlight 11 z ≥ 6.5 galaxies with detections in Spitzer/IRAC imaging, several of which show evidence for some combination of evolved stellar populations, large contributions of nebular emission lines, and/or dust. Among these is PLCKG287+32-2013, one of the brightest z ∼ 7 candidates known (AB mag 24.9 at 1.6 μm) with a Spitzer 3.6 μm flux excess suggesting strong [O iii] + H-β emission (∼1000 Å rest-frame equivalent width). We discuss the possible uses and limits of our sample and present a public catalog of Hubble + Spitzer photometry along with physical property estimates for all objects in the sample. Because of their apparent brightnesses, high redshifts, and variety of stellar populations, these objects are excellent targets for follow-up with the James Webb Space Telescope.

RELICS: Properties of z ≥ 5.5 Galaxies Inferred from Spitzer and Hubble Imaging, Including A Candidate z ∼ 6.8 Strong [O iii] emitter

文献摘要

相似文献