Hongwei Xi, Bo Peng, Lister Staveley-Smith, Bi-Qing For, Bin Liu, Dejian Ding
{"title":"FAST Ultra-Deep Survey (FUDS): Data Release for FUDS0","authors":"Hongwei Xi, Bo Peng, Lister Staveley-Smith, Bi-Qing For, Bin Liu, Dejian Ding","doi":"arxiv-2409.06153","DOIUrl":null,"url":null,"abstract":"We have used the Five-hundred-meter Aperture Spherical radio Telescope (FAST)\nto make a blind ultra-deep survey for neutral hydrogen (HI). We present the\ncomplete results from the first of six fields (FUDS0). This observation of 95\nhours allowed us to achieve a high sensitivity ($\\sim 50~\\mu$Jy beam$^{-1}$)\nand a high frequency resolution (22.9 kHz) over an area of 0.72 deg$^2$. We\ndetected 128 galaxies in HI distributed over the redshift range of $0<z<0.4$\nwith HI masses in the range of $6.67 \\leq \\log(M_{\\rm HI}/h_{70}^{-2} \\rm\nM_\\odot) \\leq 10.92$, and three faint high-velocity clouds (HVCs) with peak\ncolumn density of $N_{\\rm HI} \\leq 3.1 \\times 10^{17}$ cm$^{-2}$. Of the\ngalaxies, 95 are new detections and six have $z > 0.38$, where no unlensed HI\nemission has previously been directly detected. Estimates of completeness and\nreliability are presented for the catalog. Consistency of continuum and HI flux\nestimates with NVSS and AUDS, respectively, confirms the accuracy of\ncalibration method and data reduction pipeline developed for the full FUDS\nsurvey.","PeriodicalId":501187,"journal":{"name":"arXiv - PHYS - Astrophysics of Galaxies","volume":"109 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Astrophysics of Galaxies","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.06153","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We have used the Five-hundred-meter Aperture Spherical radio Telescope (FAST)
to make a blind ultra-deep survey for neutral hydrogen (HI). We present the
complete results from the first of six fields (FUDS0). This observation of 95
hours allowed us to achieve a high sensitivity ($\sim 50~\mu$Jy beam$^{-1}$)
and a high frequency resolution (22.9 kHz) over an area of 0.72 deg$^2$. We
detected 128 galaxies in HI distributed over the redshift range of $0 0.38$, where no unlensed HI
emission has previously been directly detected. Estimates of completeness and
reliability are presented for the catalog. Consistency of continuum and HI flux
estimates with NVSS and AUDS, respectively, confirms the accuracy of
calibration method and data reduction pipeline developed for the full FUDS
survey.
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