{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/searching-for-low-redshift-faint-galaxies","title":"Searching for low-redshift faint galaxies with MMT/Hectospec","arxiv_id":"2107.11682","date":"2021-07-24","proceeding":null,"authors":["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","C. Kevin Xu","Xu Shao","Marat Musin"],"abstract":"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.","url_abs":"https://arxiv.org/abs/2107.11682v3","url_pdf":"https://arxiv.org/pdf/2107.11682v3.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"searching-for-low-redshift-faint-galaxies","repo_url":"https://github.com/chengchengcode/low-redshift-galaxies","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}