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arXiv 1502.02659astro-ph.GA
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GOODS-South场中的WFC3格棱发射线红移星表

A WFC3 Grism Emission Line Redshift Catalog in the GOODS-South Field

Aaron M. Morris, Dale D. Kocevski, Jonathan R. Trump, Benjamin J. Weiner, Nimish P. Hathi, Guillermo Barro, Tomas Dahlen, Sandra M. Faber, Steven L. Finkelstein… 展开作者

Aaron M. Morris, Dale D. Kocevski, Jonathan R. Trump, Benjamin J. Weiner, Nimish P. Hathi, Guillermo Barro, Tomas Dahlen, Sandra M. Faber, Steven L. Finkelstein, Adriano Fontana, Henry C. Ferguson, Norman A. Grogin, Ruth Grützbauch, Yicheng Guo, Li-Ting Hsu, Anton M. Koekemoer, David C. Koo, Bahram Mobasher, Janine Pforr, Mara Salvato, Tommy Wiklind, Stijn Wuyts

摘要:

我们结合HST/WFC 3成像和G141棱镜观测从CANDELS和3D-HST调查产生一个目录的棱镜光谱红移的星系在CANDELS/GOODS-South领域。WFC 3/G141棱镜光谱覆盖1.1<lambda<1.7微米的波长范围,点源的分辨能力为R~130,从而提供了z~3.5的星系的静止框架光谱。该星表选择在H波段(F160 W),包括有和没有以前发表的光谱红移的星系。棱镜光谱提取的所有H-波段检测到的星系与H <24 and a CANDELS photometric redshift z_phot >0.6。所得到的光谱进行目视检查,以确定发射线和红移确定使用经验光谱模板的互相关。为了确定我们的红移的准确性,我们将我们的结果与文献中的高质量光谱红移进行了比较。使用411个控制星系的样本,这个分析产生的精度sigma_NMAD=0.0028的grism-derived红移,这是与3D-HST团队报告的准确性一致。我们最终的星表覆盖了153平方角分的面积,包含了GOODS-S中星系的1019个红移。大约60%(608/1019)的红移是以前没有发表过光谱红移的星系。这些新的红移范围为0.677 &lt; z &lt; 3.456,中位红移为z=1.282。该目录包含了234个z&gt;1.5的星系的新红移。此外,我们提出了20个星系对候选人首次确定使用我们的目录中的棱镜红移,包括四个新的星系对在z~2,几乎是以前确定的这样的对的数量的两倍。

英文摘要:

We combine HST/WFC3 imaging and G141 grism observations from the CANDELS and 3D-HST surveys to produce a catalog of grism spectroscopic redshifts for galaxies in the CANDELS/GOODS-South field. The WFC3/G141 grism spectra cover a wavelength range of 1.1<lambda<1.7 microns with a resolving power of R~130 for point sources, thus providing rest-frame optical spectra for galaxies out to z~3.5. The catalog is selected in the H-band (F160W) and includes both galaxies with and without previously published spectroscopic redshifts. Grism spectra are extracted for all H-band detected galaxies with H<24 and a CANDELS photometric redshift z_phot > 0.6. The resulting spectra are visually inspected to identify emission lines and redshifts are determined using cross-correlation with empirical spectral templates. To establish the accuracy of our redshifts, we compare our results against high-quality spectroscopic redshifts from the literature. Using a sample of 411 control galaxies, this analysis yields a precision of sigma_NMAD=0.0028 for the grism-derived redshifts, which is consistent with the accuracy reported by the 3D-HST team. Our final catalog covers an area of 153 square arcmin and contains 1019 redshifts for galaxies in GOODS-S. Roughly 60% (608/1019) of these redshifts are for galaxies with no previously published spectroscopic redshift. These new redshifts span a range of 0.677 < z < 3.456 and have a median redshift of z=1.282. The catalog contains a total of 234 new redshifts for galaxies at z>1.5. In addition, we present 20 galaxy pair candidates identified for the first time using the grism redshifts in our catalog, including four new galaxy pairs at z~2, nearly doubling the number of such pairs previously identified.

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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