Status and perspectives of the CRAFTS extra-galactic HI survey

FAST Collaboration

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is expected to complete its commissioning in 2019. FAST will soon begin the Commensal Radio Astronomy FasT Survey (CRAFTS), a novel and unprecedented commensal drift scan survey of the entire sky visible from FAST. The goal of CRAFTS is to cover more than 20000 deg2 and reach redshift up to about 0.35. We provide empirical measurements of the beam size and sensitivity of FAST across the 1.05 to 1.45 GHz frequency range of the FAST L-band array of 19-beams (FLAN). Using a simulated HI-galaxy catalogue based on the HI Mass Function (HIMF), we estimate the number of galaxies that CRAFTS may detect. At redshifts below 0.35, over 6 × 105 HI galaxies may be detected. Below the redshift of 0.07, the CRAFTS HIMF will be complete above a mass threshold of 109.5M. FAST will be able to investigate the environmental and redshift dependence of the HIMF to an unprecedented depth, shedding light onto the missing baryon and missing satellite problems.

Original languageEnglish
Article number959506
JournalScience China: Physics, Mechanics and Astronomy
Volume62
Issue number5
DOIs
Publication statusPublished - 1 May 2019

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radio astronomy
radio telescopes
apertures
galaxies
ultrahigh frequencies
catalogs
sky
baryons
frequency ranges
thresholds
sensitivity
estimates

Cite this

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title = "Status and perspectives of the CRAFTS extra-galactic HI survey",
abstract = "The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is expected to complete its commissioning in 2019. FAST will soon begin the Commensal Radio Astronomy FasT Survey (CRAFTS), a novel and unprecedented commensal drift scan survey of the entire sky visible from FAST. The goal of CRAFTS is to cover more than 20000 deg2 and reach redshift up to about 0.35. We provide empirical measurements of the beam size and sensitivity of FAST across the 1.05 to 1.45 GHz frequency range of the FAST L-band array of 19-beams (FLAN). Using a simulated HI-galaxy catalogue based on the HI Mass Function (HIMF), we estimate the number of galaxies that CRAFTS may detect. At redshifts below 0.35, over 6 × 105 HI galaxies may be detected. Below the redshift of 0.07, the CRAFTS HIMF will be complete above a mass threshold of 109.5M⊙. FAST will be able to investigate the environmental and redshift dependence of the HIMF to an unprecedented depth, shedding light onto the missing baryon and missing satellite problems.",
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author = "{FAST Collaboration} and Kai Zhang and Wu, {Jing Wen} and Di Li and Marko Krčo and Lister Staveley-Smith and Tang, {Ning Yu} and Lei Qian and Liu, {Meng Ting} and Jin, {Cheng Jin} and Yue, {You Ling} and Yan Zhu and Liu, {Hong Fei} and Yu, {Dong Jun} and Sun, {Jing Hai} and Pan, {Gao Feng} and Hui Li and Gan, {Heng Qian} and Rui Yao",
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language = "English",
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Status and perspectives of the CRAFTS extra-galactic HI survey. / FAST Collaboration.

In: Science China: Physics, Mechanics and Astronomy, Vol. 62, No. 5, 959506, 01.05.2019.

Research output: Contribution to journalArticle

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T1 - Status and perspectives of the CRAFTS extra-galactic HI survey

AU - FAST Collaboration

AU - Zhang, Kai

AU - Wu, Jing Wen

AU - Li, Di

AU - Krčo, Marko

AU - Staveley-Smith, Lister

AU - Tang, Ning Yu

AU - Qian, Lei

AU - Liu, Meng Ting

AU - Jin, Cheng Jin

AU - Yue, You Ling

AU - Zhu, Yan

AU - Liu, Hong Fei

AU - Yu, Dong Jun

AU - Sun, Jing Hai

AU - Pan, Gao Feng

AU - Li, Hui

AU - Gan, Heng Qian

AU - Yao, Rui

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