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

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

扫码查看
原文链接
  • 万方数据
  • 维普
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.

surveysredshiftsgalaxiestelescoperadio linesHI line

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

展开 >

Guizhou Radio Astronomical Observatory,Guizhou University,Guiyang 550000,China

National Astronomical Observatories,Chinese Academy of Sciences(CAS),Beijing 100101,China

Chinese Academy of Sciences South America Center for Astronomy,National Astronomical Observatories,CAS,Beijing 100101,China

Kavli Institute for Astronomy and Astrophysics,Peking University,Beijing 100871,China

展开 >

National Key R&D Program of ChinaNational Key R&D Program of ChinaWest Light Foundation of the Chinese Academy of Sciences(CAS)National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCASCAS South America Center for Astronomy(CASSACA)science research grants from the China Manned Space ProjectNational Astronomical Observatories of Chinese Academy of Sciences(NAOC)U.S.Department of Energy,Office of Science,Office of High Energy PhysicsNational Science FoundationAlfred P.Sloan FoundationU.S.Department of Energy Ofice of ScienceCenter for High-Performance Computing at the University of Utah

2018YFE02029002022YFA1602901118030441193300312173045CMS-CSST-2021-A05DE-SC0020086AST-1616414

2024

10.1007/s11433-023-2219-7

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
年,卷(期)：2024.67(1)
  • 96