2015MNRAS.452.3726H

Query : 2015MNRAS.452.3726H

2015MNRAS.452.3726H - Mon. Not. R. Astron. Soc., 452, 3726-3741 (2015/October-1)

A blind HI mass function from the Arecibo Ultra-Deep Survey (AUDS).

HOPPMANN L., STAVELEY-SMITH L., FREUDLING W., ZWAAN M.A., MINCHIN R.F. and CALABRETTA M.R.

Abstract (from CDS):

The Arecibo Ultra-Deep Survey (AUDS) combines the unique sensitivity of the telescope with the wide field of the Arecibo L-band Feed Array (ALFA) to directly detect 21 cm H i emission from galaxies at distances beyond the local Universe bounded by the lower frequency limit of ALFA (z = 0.16). AUDS has collected 700 h of integration time in two fields with a combined area of 1.35 deg2. In this paper, we present data from 60 percent of the total survey, corresponding to a sensitivity level of 80µJy. We discuss the data reduction, the search for galaxies, parametrization, optical identification and completeness. We detect 102 galaxies in the mass range of log(M_H I/M)-2logh=5.6-10.3. We compute the H i mass function (HIMF) at the highest redshifts so far measured. A fit of a Schechter function results in α = - 1.37±0.03, Φ* = (7.72±1.4)x 10–3h3Mpc-3 and log (M_H i^*/M_☉)=(9.75±0.041)+2logh. Using the measured HIMF, we find a cosmic H i density of Ω_H i=(2.33±0.07)×10^-4  h^-1 for the sample (z = 0.065). We discuss further uncertainties arising from cosmic variance. Because of its depth, AUDS is the first survey that can determine parameters for the HIMF in independent redshift bins from a single homogeneous data set. The results indicate little evolution of the comoving mass function and Ω_H i within this redshift range. We calculate a weighted average for Ω_H i in the range 0 < z < 0.2, combining the results from AUDS as well as results from other 21 cm surveys and stacking, finding a best combined estimate of Ω_H i=( 2.63±0.10)×10^-4  h^-1.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: evolution - galaxies: ISM - galaxies: luminosity function, mass function - radio lines: galaxies

Nomenclature: Table A1: AUDS JHHMMSS+DDMMSS N=102.

Simbad objects: 104

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Number of rows : 104
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 AUDS J081749+221114 G 08 17 49.0 +22 11 14           ~ 1 0
2 AUDS J081754+222019 G 08 17 54.0 +22 20 19           ~ 2 0
3 AUDS J081755+222631 G 08 17 55.0 +22 26 31           ~ 2 0
4 AUDS J081802+221713 G 08 18 02.0 +22 17 13           ~ 2 0
5 AUDS J081804+215653 G 08 18 04.0 +21 56 53           ~ 2 0
6 AUDS J081807+215746 G 08 18 07.0 +21 57 46           ~ 2 0
7 SDSS J081823.08+222431.0 G 08 18 23.0777550792 +22 24 30.972967740           ~ 5 0
8 SDSS J081825.11+220450.2 G 08 18 25.1213439648 +22 04 50.247814980           ~ 4 0
9 AUDS J081828+222346 G 08 18 28.0 +22 23 46           ~ 2 0
10 2MASX J08183002+2203148 LSB 08 18 30.0098246064 +22 03 14.774177088           ~ 7 0
11 AUDS 123 AG? 08 18 33.4525 +21 53 25.388           ~ 3 0
12 AUDS J081834+223021 G 08 18 34.0 +22 30 21           ~ 2 0
13 AUDS J081849+221218 G 08 18 49.0 +22 12 18           ~ 2 0
14 Z 119-44 AG? 08 18 50.264 +22 06 55.35   15.7       ~ 32 0
15 AUDS J081852+220531 G 08 18 52.0 +22 05 31           ~ 2 0
16 AUDS J081858+215428 G 08 18 58.0 +21 54 28           ~ 2 0
17 AUDS J081859+221749 G 08 18 59.0 +22 17 49           ~ 2 0
18 AUDS J081902+215238 G 08 19 02.0 +21 52 38           ~ 2 0
19 AUDS J081902+222307 G 08 19 02.0 +22 23 07           ~ 2 0
20 AUDS J081909+222422 G 08 19 09.0 +22 24 22           ~ 2 0
21 AUDS J081910+220931 G 08 19 10.0 +22 09 31           ~ 2 0
22 AUDS J081910+222352 G 08 19 10.0 +22 23 52           ~ 2 0
23 LEDA 1659710 G 08 19 21.31903 +21 54 33.9259           ~ 7 0
24 AUDS J081933+220624 G 08 19 33.0 +22 06 24           ~ 2 0
25 AUDS J081939+221955 G 08 19 39.0 +22 19 55           ~ 2 0
26 SDSS J081940.40+220753.0 G 08 19 40.40670 +22 07 53.0172           ~ 6 0
27 AUDS J081947+220156 G 08 19 47.0 +22 01 56           ~ 2 0
28 NGC 2565 GiG 08 19 48.3010303872 +22 01 53.130704844   13.8       ~ 130 0
29 AUDS J081957+221628 G 08 19 57.0 +22 16 28           ~ 1 0
30 AUDS J082004+221141 G 08 20 04.0 +22 11 41           ~ 2 0
31 AUDS J082011+220321 G 08 20 11.0 +22 03 21           ~ 2 0
32 AUDS J082011+223025 G 08 20 11.0 +22 30 25           ~ 2 0
33 AUDS J082013+220520 G 08 20 13.0 +22 05 20           ~ 2 0
34 LEDA 1668887 G 08 20 26.491 +22 23 03.92           ~ 12 0
35 AUDS J082034+220848 G 08 20 34.0 +22 08 48           ~ 1 0
36 AUDS J082038+221546 G 08 20 38.0 +22 15 46           ~ 2 0
37 SDSS J082047.00+220136.8 AG? 08 20 47.006 +22 01 36.83           ~ 6 0
38 LEDA 1664291 G 08 20 49.4539772160 +22 08 20.358878892           ~ 7 0
39 AUDS J082059+220318 G 08 20 59.0 +22 03 18           ~ 2 0
40 SDSS J082111.71+222039.7 G 08 21 11.70895 +22 20 39.7644           ~ 4 0
41 AUDS J082116+221604 G 08 21 16.0 +22 16 04           ~ 1 0
42 AUDS J082117+223048 G 08 21 17.0 +22 30 48           ~ 2 0
43 AUDS J082119+221100 G 08 21 19.0 +22 11 00           ~ 2 0
44 AUDS J082121+220258 G 08 21 21.0 +22 02 58           ~ 2 0
45 AUDS J082129+215551 G 08 21 29.0 +21 55 51           ~ 2 0
46 AUDS J082130+221945 G 08 21 30.0 +22 19 45           ~ 1 0
47 AUDS J082137+221042 G 08 21 37.0 +22 10 42           ~ 2 0
48 AUDS J082140+221132 G 08 21 40.0 +22 11 32           ~ 2 0
49 AUDS J082147+220345 G 08 21 47.0 +22 03 45           ~ 2 0
50 AUDS J082158+220924 G 08 21 58.0 +22 09 24           ~ 2 0
51 AUDS J082203+221604 G 08 22 03.0 +22 16 04           ~ 2 0
52 AUDS J082214+220715 G 08 22 14.0 +22 07 15           ~ 2 0
53 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
54 AUDS J165659+201232 G 16 56 59.0 +20 12 32           ~ 1 0
55 LEDA 3573249 G 16 57 47.77927 +19 54 44.3727           ~ 5 0
56 LEDA 4007436 G 16 57 49.19302 +19 31 37.3893           ~ 5 0
57 AUDS J165759+194339 G 16 57 59.0 +19 43 39           ~ 2 0
58 AUDS J165802+194225 G 16 58 02.0 +19 42 25           ~ 2 0
59 AUDS J165802+200335 G 16 58 02.0 +20 03 35           ~ 2 0
60 AUDS J165806+195322 G 16 58 06.0 +19 53 22           ~ 2 0
61 AUDS J165812+195427 G 16 58 12.0 +19 54 27           ~ 2 0
62 AUDS J165824+192822 G 16 58 24.0 +19 28 22           ~ 2 0
63 AUDS J165824+193645 G 16 58 24.0 +19 36 45           ~ 2 0
64 AUDS J165831+200304 G 16 58 31.0 +20 03 04           ~ 2 0
65 AUDS J165832+195702 G 16 58 32.0 +19 57 02           ~ 1 0
66 AUDS J165835+200139 G 16 58 35.0 +20 01 39           ~ 2 0
67 AUDS J165850+194959 G 16 58 50.0 +19 49 59           ~ 2 0
68 AUDS J165851+195639 G 16 58 51.0 +19 56 39           ~ 2 0
69 AUDS J165853+195104 G 16 58 53.0 +19 51 04           ~ 2 0
70 SDSS J165905.19+193921.0 G 16 59 05.195 +19 39 21.05           ~ 5 0
71 SDSS J165906.30+193603.4 G 16 59 06.30394 +19 36 03.4440           ~ 4 0
72 AUDS J165908+194004 G 16 59 08.0 +19 40 04           ~ 2 0
73 AUDS J165912+195250 G 16 59 12.0 +19 52 50           ~ 2 0
74 AUDS J165929+192625 G 16 59 29.0 +19 26 25           ~ 2 0
75 AUDS 6 AG? 16 59 34.5738 +19 45 23.226           ~ 3 0
76 AUDS J165935+195404 G 16 59 35.0 +19 54 04           ~ 2 0
77 AUDS J165938+193030 G 16 59 38.0 +19 30 30           ~ 1 0
78 AUDS J165938+193512 G 16 59 38.0 +19 35 12           ~ 1 0
79 SDSS J165941.10+193441.1 G 16 59 41.1002124408 +19 34 41.197995120           ~ 4 0
80 AUDS J165950+194442 G 16 59 50.0 +19 44 42           ~ 2 0
81 AUDS J165952+193840 G 16 59 52.0 +19 38 40           ~ 1 0
82 AUDS J170012+200402 G 17 00 12.0 +20 04 02           ~ 2 0
83 AUDS J170014+194924 G 17 00 14.0 +19 49 24           ~ 2 0
84 AUDS J170015+193342 G 17 00 15.0 +19 33 42           ~ 2 0
85 AUDS J170026+193719 G 17 00 26.0 +19 37 19           ~ 2 0
86 AUDS J170029+195809 G 17 00 29.0 +19 58 09           ~ 2 0
87 AUDS J170030+195524 G 17 00 30.0 +19 55 24           ~ 2 0
88 AUDS J170052+195236 G 17 00 52.0 +19 52 36           ~ 2 0
89 AUDS J170058+194515 G 17 00 58.0 +19 45 15           ~ 2 0
90 AUDS J170104+194853 G 17 01 04.0 +19 48 53           ~ 2 0
91 AUDS J170104+194353 G 17 01 04.0 +19 43 53           ~ 2 0
92 AUDS J170106+195504 G 17 01 06.0 +19 55 04           ~ 2 0
93 AUDS J170117+200235 G 17 01 17.0 +20 02 35           ~ 1 0
94 AUDS J170122+195245 G 17 01 22.0 +19 52 45           ~ 2 0
95 AUDS J170123+195238 G 17 01 23.0 +19 52 38           ~ 1 0
96 AUDS J170129+194059 G 17 01 29.0 +19 40 59           ~ 2 0
97 AUDS J170133+200336 G 17 01 33.0 +20 03 36           ~ 1 0
98 AUDS J170133+193253 G 17 01 33.0 +19 32 53           ~ 1 0
99 AUDS J170137+194326 G 17 01 37.0 +19 43 26           ~ 2 0
100 AUDS J170137+194831 G 17 01 37.0 +19 48 31           ~ 2 0
101 AUDS J170145+195503 G 17 01 45.0 +19 55 03           ~ 2 0
102 AUDS J170146+193308 G 17 01 46.0 +19 33 08           ~ 2 0
103 AUDS J170212+193010 G 17 02 12.0 +19 30 10           ~ 2 0
104 NAME Local Group GrG ~ ~           ~ 9325 0

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