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Abstract
We have used the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to conduct a blind ultradeep survey for neutral hydrogen (H i). We present the complete results from the first of six fields (FUDS0). These observations of 95 hr allowed us to achieve a high-sensitivity (∼50 μJy beam−1) and a high-frequency resolution (22.9 kHz) over an area of 0.72 deg2. We detected 128 galaxies in H i distributed over the redshift range of 0 < z < 0.4, with H i masses in the range of 6.67 ≤ log ( M H I / h 70 − 2 M ⊙ ) ≤ 10.92 , and three faint high-velocity clouds, with a peak column density of N H i ≤ 3.1 × 1017 cm−2. Of the galaxies, 95 are new detections and six have z > 0.38, where no unlensed H i emission has previously been directly detected. Estimates of completeness and reliability are presented for the catalog. The consistency of continuum and H i flux estimates with the NRAO VLA Sky Survey and the Arecibo Ultra-Deep Survey, respectively, confirms the accuracy of the calibration method and data reduction pipeline developed for the full FAST Ultra-Deep Survey.
Original language | English |
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Article number | 18 |
Number of pages | 11 |
Journal | Astrophysical Journal, Supplement Series |
Volume | 274 |
Issue number | 1 |
DOIs | |
Publication status | Published - 10 Sept 2024 |
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ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions
Kewley, L. (Investigator 01), Wyithe, S. (Investigator 02), Sadler, E. (Investigator 03), Staveley-Smith, L. (Investigator 04), Glazebrook, K. (Investigator 05), Jackson, C. (Investigator 06), Bland-Hawthorn, J. (Investigator 07), Asplund, M. (Investigator 08), Power, C. (Investigator 09) & Driver, S. (Investigator 10)
ARC Australian Research Council
1/01/17 → 31/12/24
Project: Research