分类： 天文学 >> 天文学 提交时间： 2023-02-19
Cheng Cheng
Jia-Sheng Huang
Christopher N. A. Willmer
Hong-Xin Zhang
Matthew L. N. Ashby
Hai Xu
Marcin Sawicki
Stephane Arnouts
Stephen Gwyn
Guillaume Desprez
Jean Coupon
Anneya Golob
Piaoran Liang
Tianwen Cao
Yaru Shi
Gaoxiang Jin
Chuan He
Shumei Wu
Zijian Li
Y. Sophia Dai
摘要： We present redshifts for 2753 low-redshift galaxies between $0.03 \lesssim z_{\rm spec}\lesssim0.5$ with 18 $\leq$ $r$ $\leq$ 22 obtained with Hectospec at the Multi-Mirror Telescope (MMT). The observations targeted the XMM-LSS, ELAIS-N1 and DEEP2-3 fields, each of which covers $\sim$ 1 deg$^2$. These fields are also part of the recently completed CFHT Large Area U-band Deep Survey (CLAUDS) and on-going Hyper Suprime-Cam deep fields surveys. The efficiency of our technique for selecting low-redshift galaxies is confirmed by the redshift distribution of our sources. In addition to redshifts, these high S/N spectra are used to measure ages, metallicities, and nuclear activity levels. In combination with the photometric catalogue in $u$, $g$, $r$, $i$, $z$, $y$ down to 27 AB mag, we are able to study the galaxy population down to stellar masses of $\sim$ 10$^8 M_\odot$ . This paper presents the observational strategy, the reduction procedure and properties of the galaxy sample.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Cheng Cheng
Jia-Sheng Huang
Hai Xu
Gaoxiang Jin
Chuan He
Tianwen Cao
Zijian Li
Shumei Wu
Piaoran Liang
Yaru Shi
Xu Shao
Y. Sophia Dai
Cong Kevin Xu
Marat Musin
摘要： The Spitzer Extended Deep Survey (SEDS) as a deep and wide mid-infrared (MIR) survey project provides a sample of 500000+ sources spreading 1.46 square degree and a depth of 26 AB mag (3$\sigma$). Combining with the previous available data, we build a PSF-matched multi-wavelength photometry catalog from u band to 8$\mu$m. We fit the SEDS galaxies spectral energy distributions by the local galaxy templates. The results show that the SEDS galaxy can be fitted well, indicating the high redshift galaxy ($z \sim 1$) shares the same templates with the local galaxies. This study would facilitate the further study of the galaxy luminosity and high redshift mass function.
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