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[论文解读] JADES Data Release 3 -- NIRSpec/MSA spectroscopy for 4,000 galaxies in the GOODS fields

Francesco D’Eugenio, Alex J. Cameron|arXiv (Cornell University)|Apr 9, 2024
Astronomy and Astrophysical Research被引用 18
一句话总结

JADES DR3 提供 NIRSpec/MSA 光谱学用于 GOODS-field 的 4,000 个目标,得到 2,375 个星系红移(最高到 z=13),并包含完全降噪的 2D/1D 光谱与经过标定的 NIRCam 成像。

ABSTRACT

We present the third data release of JADES, the JWST Advanced Deep Extragalactic Survey, providing both imaging and spectroscopy in the two GOODS fields. Spectroscopy consists of medium-depth and deep NIRSpec/MSA spectra of 4,000 targets, covering the spectral range 0.6-5.3 $μ$m and observed with both the low-dispersion prism (R=30-300) and all three medium-resolution gratings (R=500-1,500). We describe the observations, data reduction, sample selection, and target allocation. We measured 2,375 redshifts (2,053 from multiple emission lines); our targets span the range from z=0.5 up to z=13, including 404 at z>5. The data release includes 2-d and 1-d fully reduced spectra, with slit-loss corrections and background subtraction optimized for point sources. We also provide redshifts and S/N>5 emission-line flux catalogs for the prism and grating spectra, and concise guidelines on how to use these data products. Alongside spectroscopy, we are also publishing fully calibrated NIRCam imaging, which enables studying the JADES sample with the combined power of imaging and spectroscopy. Together, these data provide the largest statistical sample to date to characterize the properties of galaxy populations in the first billion years after the Big Bang.

研究动机与目标

  • 实现从 Cosmic Noon 到 Epoch of Reionization 的大规模、统计性的光谱普查。
  • 提供完全降标定、通量标定的 1D/2D 光谱,包含红移和发射线强度测量。
  • 提供更高层次的数据产品(红移目录和线强度目录)及使用指南。
  • 公开经过严格标定的 NIRCam 成像,以便进行联合成像+光谱分析。

提出的方法

  • 使用低色散棱镜(R=30–300)和中分辨率光栅(R=500–1,500)进行 NIRSpec/MSA 的观测。
  • 数据降低过程产出适用于点源的具备狭缝损耗修正和背景减除的 2D/1D 光谱。
  • 通过分层调查设计(Deep、Medium、Ultradeep)和优先级类别进行样本选择,以最大化高-z 和统计覆盖。
  • 测量红移和发射线通量;为棱镜和光栅光谱创建 S/N>5 的发射线目录。
  • 公开发布包括 GOODS-N 中的 NIRCam 成像和带有光度学红移的光度计目录;数据产品概览及使用指南。
Figure 1: Mosaic of JADES JWST/NIRCam data in the GOODS-N field acquired in February 2023. The F444W, F200W, and F090W mosaics are shown as the red, green, and blue channels in this multicolor image. The scale bar indicates 1 arcmin.
Figure 1: Mosaic of JADES JWST/NIRCam data in the GOODS-N field acquired in February 2023. The F444W, F200W, and F090W mosaics are shown as the red, green, and blue channels in this multicolor image. The scale bar indicates 1 arcmin.

实验结果

研究问题

  • RQ1在 GOODS 场域中,NIRSpec/MSA 样本的红移分布如何,包括高-z 尾部(z>5)?
  • RQ2棱镜和光栅光谱中的发射线特性(通量、S/N)有哪些,以及它们如何支持金属丰度与电离状态研究?
  • RQ3光谱数据结合 NIRCam 成像如何揭示从 z~0.5 到 z~13 的星系属性与演化?
  • RQ4关于 DR3 产品的数据质量、标定和使用注意事项有哪些?

主要发现

  • 2,375 个红移被测定(2,053 来自多条发射线)。
  • 目标的红移从 z=0.5 到 z=13,其中 z>5 的有 404 个。
  • DR3 提供 2D 和 1D 的完全降标定光谱,具备狭缝损耗修正和针对点源优化的背景减除。
  • 红移和 S/N>5 的发射线通量目录已发布,适用于棱镜和光栅数据。
  • 配套有经过完全标定的 NIRCam 成像和光度目录,便于联合分析。
  • 该数据集是迄今为止用于描述大爆炸后首个十亿年星系群体的最大统计样本。
Figure 2: Mosaic of JADES JWST/NIRCam data covering the Hubble Deep Field region. Shown are the F444W, F200W, and F090W mosaics as the red-green-blue channels of this multicolor image. The iconic Hubble Deep Field (Williams et al., 1996 ) footprint is shown as a silver line. We note the linear diffu
Figure 2: Mosaic of JADES JWST/NIRCam data covering the Hubble Deep Field region. Shown are the F444W, F200W, and F090W mosaics as the red-green-blue channels of this multicolor image. The iconic Hubble Deep Field (Williams et al., 1996 ) footprint is shown as a silver line. We note the linear diffu

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