2025ApJS..276....6Z

Query : 2025ApJS..276....6Z

2025ApJS..276....6Z - Astrophys. J., Suppl. Ser., 276, 6 (2025/January-0)

FASHI: An Untargeted Survey of the 21 cm H I Absorption Galaxies with FAST.

ZHANG C.-P., ZHU M., JIANG P., CHENG C., XU J.-L., YU N.-P., LIU X.-L. and ZHANG B.

Abstract (from CDS):

The FAST All Sky H I survey (FASHI) will cover the entire observable sky (∼22,000 square degrees) with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). With the currently released data, we perform an untargeted survey of 21 cm H I absorption galaxies at redshift z ≲ 0.09 over an area of about 10,000 square degrees. We have detected 51 H I absorbers, including 21 previously known and 30 new ones. The probability of occurrence for the H I absorbers in all H I galaxies is 1/1078. The radio flux densities of the FASHI absorbers are mainly concentrated in the range of S1.4GHz = 10 ∼ 100 mJy, but also as low as 2.6 ± 0.4 mJy. We find that the host galaxies of the associated H I absorbers have relatively high star formation rates, and there is a negative correlation between the H I column density and the stellar mass in the host galaxy. Consequently, FAST has significantly improved the capabilities and performance for H I absorption observations and has provided a true untargeted survey of 21 cm H I absorption galaxies for such studies.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio telescopes - Redshift surveys - Extragalactic radio sources - H I line emission

Simbad objects: 56

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Number of rows : 56
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
2 IC 64 rG 00 59 24.4201 +27 03 32.606   15.6       ~ 43 1
3 Z 502-27 rG 01 19 35.00087601 +32 10 50.0619670   16 14.5     ~ 249 1
4 NVSS J012407+295246 rG 01 24 07.5 +29 52 44           ~ 3 0
5 NGC 984 AG? 02 34 43.0972439667 +23 24 46.815242330   14.5       ~ 62 1
6 NVSS J024600+511515 rG 02 46 00.5111985936 +51 15 14.627651436           ~ 18 1
7 IRAS 03021-1205 rG 03 04 29.5858599912 -11 54 22.827453876   16.81   15.37   ~ 12 0
8 NVSS J030632+541158 Rad 03 06 32.740 +54 11 58.49           ~ 4 1
9 NGC 1266 Sy1 03 16 00.7739640240 -02 25 37.827013584   14   12.46   ~ 332 2
10 IC 311 rG 03 16 46.6977081552 +40 00 12.378033574   15.7       ~ 27 1
11 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
12 UGC 2715 GiC 03 24 22.8080586384 +40 47 19.041461628   16.0       ~ 23 1
13 NVSS J032615+492357 Rad 03 26 15.99 +49 23 57.0           ~ 3 1
14 NVSS J033337+444941 Rad 03 33 37.49 +44 49 39.9           ~ 2 1
15 NVSS J043638+542159 rG 04 36 38.6086370760 +54 21 59.276622564           ~ 7 1
16 IRAS 04388+4400 rG 04 42 28.52586240 +44 06 38.1993480           ~ 3 0
17 NVSS J044434+525224 rG 04 44 34.7584784424 +52 52 24.757896180           ~ 7 1
18 MCG-02-13-040a Sy2 05 04 53.05680 -10 14 52.3356   15   14.22   ~ 67 1
19 NVSS J051421+371714 Rad 05 14 21.101 +37 17 13.65           ~ 5 1
20 NVSS J053118+315412 Rad 05 31 18.79 +31 54 12.3           ~ 3 0
21 NVSS J060803+450825 rG 06 08 03.4365189559 +45 08 25.012419822           ~ 11 1
22 IRAS 07156+4039 SyG 07 19 08.69206 +40 33 42.0095           ~ 8 0
23 LEDA 1955807 G 07 47 36.1499158992 +31 36 59.608332468           ~ 6 0
24 Z 206-33 SyG 07 51 35.6317149000 +42 52 48.421702272   14.81 15.0     ~ 52 1
25 Z 119-55 Sy2 08 19 37.79473 +21 06 52.1170   15.96 14.89     ~ 96 1
26 NVSS J085521+575143 rG 08 55 21.35749 +57 51 44.0817           ~ 16 1
27 LEDA 165523 G 09 07 34.911 +32 57 22.97           ~ 34 0
28 2MFGC 7622 Sy1 09 50 58.69816 +37 57 58.8438           ~ 26 0
29 NVSS J103328+360606 Rad 10 33 28.229 +36 06 07.04           ~ 3 1
30 PMN J1058-0236 rG 10 58 35.3672466120 -02 35 51.814147956   16.418   16.235   ~ 17 1
31 IC 694 AG? 11 28 27.312 +58 34 42.29   18.2       ~ 258 2
32 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
33 NGC 3894 Bla 11 48 50.35817663 +59 24 56.3822416   12.9   11.57   ~ 268 1
34 NGC 3895 LIN 11 49 04.0385633736 +59 25 57.749304468   14.0       ~ 68 0
35 LEDA 83530 GiG 12 05 47.648 +33 50 21.97   17.5       ~ 17 0
36 87GB 122241.8+323117 Sy2 12 25 13.1062101168 +32 14 01.621351680   15.42 14.23     ~ 38 1
37 NVSS J123945+401450 rG 12 39 45.17777 +40 14 48.9589   16.5       ~ 14 0
38 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
39 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 236 0
40 Z 218-14 GiG 13 28 52.127 +38 34 39.67   15.0       ~ 24 0
41 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
42 NGC 5318 LIN 13 50 36.0153559944 +33 42 17.469997164   13.5       ~ 77 1
43 Z 162-21 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 502 3
44 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
45 NGC 5675 Sy2 14 32 39.82958858 +36 18 07.9327087   14.0       ~ 122 1
46 NVSS J150034+364844 rG 15 00 34.5806968056 +36 48 45.032015808           ~ 9 1
47 Z 193-16 rG 15 08 05.69280 +34 23 23.3376   15.6       ~ 50 1
48 Z 49-138 Sy2 15 21 22.54359760 +04 20 30.1367860   15.6 16     ~ 76 1
49 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
50 NAME Hercules Supercluster SCG 15 47 +18.2           ~ 166 1
51 NGC 6034 Sy2 16 03 32.08333486 +17 11 55.3098953   15.2       ~ 105 1
52 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
53 2MASX J16054322+3710450 LIN 16 05 43.22013 +37 10 45.0770   16.52       ~ 17 1
54 6C 162542+581549 QSO 16 26 37.2369813840 +58 09 17.667263052   16.2 16.37 16.5   ~ 39 1
55 MCG+05-54-012 GiG 22 54 44.978 +32 12 48.99   15       ~ 29 1
56 Z 496-36 LSB 23 02 22.419 +32 11 20.49   15.7       ~ 14 0

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