中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(1) ：112-133.DOI:10.1007/s11433-023-2219-7

The FAST all sky HI survey(FASHI):The first release of catalog

Chuan-Peng Zhang Ming Zhu Peng Jiang Cheng Cheng Jing Wang Jie Wang Jin-Long Xu Xiao-Lan Liu Nai-Ping Yu Lei Qian Haiyang Yu Mei Ai Yingjie Jing Chen Xu Ziming Liu Xin Guan Chun Sun Qingliang Yang Menglin Huang Qiaoli Hao FAST Collaboration
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(1) ：112-133.DOI:10.1007/s11433-023-2219-7
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  • 维普
  • 万方数据

The FAST all sky HI survey(FASHI):The first release of catalog

Chuan-Peng Zhang 1Ming Zhu 1Peng Jiang 1Cheng Cheng 2Jing Wang 3Jie Wang 4Jin-Long Xu 1Xiao-Lan Liu 1Nai-Ping Yu 1Lei Qian 1Haiyang Yu 4Mei Ai 1Yingjie Jing 4Chen Xu 4Ziming Liu 4Xin Guan 1Chun Sun 1Qingliang Yang 1Menglin Huang 1Qiaoli Hao 1FAST Collaboration1
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作者信息

  • 1. Guizhou Radio Astronomical Observatory,Guizhou University,Guiyang 550000,China;National Astronomical Observatories,Chinese Academy of Sciences(CAS),Beijing 100101,China
  • 2. Chinese Academy of Sciences South America Center for Astronomy,National Astronomical Observatories,CAS,Beijing 100101,China
  • 3. Kavli Institute for Astronomy and Astrophysics,Peking University,Beijing 100871,China
  • 4. National Astronomical Observatories,Chinese Academy of Sciences(CAS),Beijing 100101,China
  • 折叠

Abstract

The FAST All Sky HI survey(FASHI)was designed to cover the entire sky observable by the Five-hundred-meter Aperture Spherical radio Telescope(FAST),spanning approximately 22000 square degrees of declination between-14° and+66°,and in the frequency range of 1050-1450MHz,with the expectation of eventually detecting more than 100000 HI sources.Between August 2020 and June 2023,FASHI had covered more than 7600 square degrees,which is approximately 35％of the total sky observable by FAST.It has a median detection sensitivity of around 0.76 mJy beam-1 and a spectral line velocity resolution of～6.4km s-1 at a frequency of～1.4GHz.As of now,a total of 41741 extragalactic HI sources have been detected in the fre-quency range 1305.5-1419.5 MHz,corresponding to a redshift limit of z(≤)0.09.By cross-matching FASHI sources with the Siena Galaxy Atlas(SGA)and the Sloan Digital Sky Survey(SDSS)catalogs,we found that 16972(40.7％)sources have spec-troscopic redshifts and 10975(26.3％)sources have only photometric redshifts.Most of the remaining 13794(33.0％)HI sources are located in the direction of the Galactic plane,making their optical counterparts difficult to identify due to high extinction or high contamination of Galactic stellar sources.Based on current survey results,the FASHI survey is an unprecedented blind extragalactic HI survey.It has higher spectral and spatial resolution and broader coverage than the Arecibo Legacy Fast ALFA Survey(ALFALFA).When completed,FASHI will provide the largest extragalactic HI catalog and an objective view of HI content and large-scale structure in the local universe.

Key words

surveys/redshifts/galaxies/telescope/radio lines/HI line

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基金项目

National Key R&D Program of China(2018YFE0202900)

National Key R&D Program of China(2022YFA1602901)

West Light Foundation of the Chinese Academy of Sciences(CAS)()

National Natural Science Foundation of China(11803044)

National Natural Science Foundation of China(11933003)

National Natural Science Foundation of China(12173045)

CAS()

CAS South America Center for Astronomy(CASSACA)()

science research grants from the China Manned Space Project(CMS-CSST-2021-A05)

National Astronomical Observatories of Chinese Academy of Sciences(NAOC)()

U.S.Department of Energy,Office of Science,Office of High Energy Physics(DE-SC0020086)

National Science Foundation(AST-1616414)

Alfred P.Sloan Foundation()

U.S.Department of Energy Ofice of Science()

Center for High-Performance Computing at the University of Utah()

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
参考文献量96
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