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arXiv 2108.00744astro-ph.GA
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大型早期星系天体物理普查(LEGA-C)数据发布3:3000在$z>0.6$上PDMATHAAB选定星系的高质量光谱

The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 3: 3000 High-Quality Spectra of $K_s$-selected galaxies at $z>0.6$

Arjen van der Wel, Rachel Bezanson, Francesco D'Eugenio, Caroline Straatman, Marijn Franx, Josha van Houdt, Michael V. Maseda, Anna Gallazzi, Po-Feng Wu, Camill… 展开作者

Arjen van der Wel, Rachel Bezanson, Francesco D'Eugenio, Caroline Straatman, Marijn Franx, Josha van Houdt, Michael V. Maseda, Anna Gallazzi, Po-Feng Wu, Camilla Pacifici, Ivana Barisic, Gabriel B. Brammer, Juan Carlos Munoz-Mateos, Sarah Vervalcke, Stefano Zibetti, David Sobral, Anna de Graaff, Joao Calhau, Yasha Kaushal, Adam Muzzin, Eric F. Bell, Pieter G. van Dokkum

摘要:

我们提出了第三次也是最后一次数据发布的大型早期星系天体物理普查(LEGA-C),ESO/VLT的公共光谱调查针对$0.6 < z < 1.0$,KS选定的星系。数据发布包含3528个光谱与测量恒星速度色散和恒星星族属性,25倍的样本量相比,以前的工作。这个$K_s$选定的样本探测星系人口下降到$\sim0.3 L^*$,所有的颜色和形态类型。随着光谱,我们出版了一个增值目录与恒星和电离气体速度色散,恒星吸收线指数,发射线通量和等效宽度,补充与结构参数测量HST/ACS成像。凭借其高精度和大样本量的组合,LEGA-C为星系演化研究提供了一个新的基准。

英文摘要:

We present the third and final data release of the Large Early Galaxy Astrophysics Census (LEGA-C), an ESO/VLT public spectroscopic survey targeting $0.6 < z < 1.0$, Ks-selected galaxies. The data release contains 3528 spectra with measured stellar velocity dispersions and stellar population properties, a 25-fold increase in sample size compared to previous work. This $K_s$-selected sample probes the galaxy population down to $\sim0.3 L^*$, for all colors and morphological types. Along with the spectra we publish a value-added catalog with stellar and ionized gas velocity dispersions, stellar absorption line indices, emission line fluxes and equivalent widths, complemented with structural parameters measured from HST/ACS imaging. With its combination of high precision and large sample size, LEGA-C provides a new benchmark for galaxy evolution studies.

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