2002A&A...390..829S

Query : 2002A&A...390..829S

2002A&A...390..829S - Astronomy and Astrophysics, volume 390829-861 (2002/8-2)

The Westerbork HI survey of spiral and irregular galaxies. I. HI imaging of late-type dwarf galaxies.

SWATERS R.A., VAN ALBADA T.S., VAN DER HULST J.M. and SANCISI R.

Abstract (from CDS):

Neutral hydrogen observations with the Westerbork Synthesis Radio Telescope are presented for a sample of 73 late-type dwarf galaxies. These observations are part of the WHISP project (Westerbork HI Survey of Spiral and Irregular Galaxies). Here we present HI maps, velocity fields, global profiles and radial surface density profiles of HI, as well as HI masses, HI radii and line widths. For the late-type galaxies in our sample, we find that the ratio of HI extent to optical diameter, defined as 6.4 disk scale lengths, is on average 1.8±0.8, similar to that seen in spiral galaxies. Most of the dwarf galaxies in this sample are rich in HI with a typical MHI/LB of 1.5. The relative HI content MHI/LR increases towards fainter absolute magnitudes and towards fainter surface brightnesses. Dwarf galaxies with lower average HI column densities also have lower average optical surface brightnesses. We find that lopsidedness is as common among dwarf galaxies as it is in spiral galaxies. About half of the dwarf galaxies in our sample have asymmetric global profiles, a third has a lopsided HI distribution, and about half shows signs of kinematic lopsidedness.

Abstract Copyright: ∼

Journal keyword(s): surveys - galaxies: dwarf - galaxies: structure

Simbad objects: 82

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Number of rows : 82
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 UGC 731 AG? 01 10 43.98 +49 36 07.9   17       ~ 103 0
2 IC 1727 GiP 01 47 29.890 +27 20 00.06   12.54 11.98 11.77   ~ 216 0
3 NGC 672 GiP 01 47 54.4764771528 +27 25 58.020709728 12.04 11.60 11.09 10.81   ~ 304 0
4 Z 503-26 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 171 0
5 Z 505-6 GiG 02 33 18.20 +33 29 28.0   14.9   13.59   ~ 91 0
6 Z 539-46 GiG 02 33 42.96 +40 31 41.2   15.0   13.45   ~ 71 0
7 Z 505-16 AG? 02 34 29.31 +29 44 59.4   15.7       ~ 59 0
8 NGC 1156 GiG 02 59 42.8528847264 +25 14 28.352017320 12.13 12.32 11.74     ~ 323 1
9 Z 347-7 AG? 04 46 16.976 +76 25 08.04   15.5       ~ 75 0
10 MCG+13-05-007a AG? 05 56 35.98 +75 19 01.9   17       ~ 89 0
11 UGC 3698 AG? 07 09 18.75 +44 22 48.2   17       ~ 45 0
12 NGC 2337 rG 07 10 13.6374445464 +44 27 26.716619844   13.1       ~ 94 1
13 UGC 3817 G 07 22 44.48 +45 06 30.7   17       ~ 49 0
14 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 588 3
15 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
16 MCG+07-16-011 AG? 07 41 25.777 +40 06 46.05   16.0       ~ 125 0
17 Z 349-16 AG? 08 07 10.05 +80 07 36.5   15.7       ~ 53 0
18 NGC 2537 H2G 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 314 2
19 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 253 1
20 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
21 NGC 2552 EmG 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 284 1
22 Z 263-63 GiP 08 37 41.489 +51 39 08.58   13.50       ~ 149 1
23 Z 237-13 G 08 43 21.8462696016 +45 44 09.601368324   15.1       ~ 71 0
24 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
25 Z 152-72 EmG 09 50 22.769 +31 29 17.80   14.48   14.10   ~ 207 0
26 NGC 3104 AG? 10 03 57.185 +40 45 41.43   14.2       ~ 142 0
27 NGC 3274 EmG 10 32 17.2253817864 +27 40 07.165226244   13.30   12.77   ~ 261 0
28 Z 184-6 AG? 10 42 42.787 +34 26 57.39   13.31 13.09 12.84 12.85 ~ 173 0
29 Z 290-65 AG? 10 44 28.536 +60 22 01.39   15.4       ~ 58 0
30 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
31 NGC 3395 GiG 10 49 50.1160141680 +32 58 58.421838360   12.1 12.10     ~ 292 1
32 NGC 3396 GiP 10 49 55.939 +32 59 26.44   12.6 12.50     ~ 214 1
33 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
34 Z 268-36 GiC 11 26 40.4656762968 +53 44 48.012539280   14.5       ~ 164 0
35 Z 242-72 AG? 11 40 05.7497793984 +45 56 31.750795896   14.6       ~ 87 0
36 Z 214-32 AG? 11 50 52.98254 +38 52 50.6594   13.72 13.9 13.39   ~ 175 0
37 NGC 3991 EmG 11 57 30.465 +32 20 03.00   13.8       ~ 163 1
38 NGC 3995 GiG 11 57 44.09779 +32 17 38.6411   12.81       ~ 170 0
39 MCG+09-20-050 AG? 11 58 25.96 +50 55 03.4   17       ~ 67 0
40 NGC 4068 AG? 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 189 0
41 Z 187-12 AG? 12 08 41.514 +36 48 08.27   14.7       ~ 89 0
42 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 260 0
43 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 238 0
44 NGC 4190 LSB 12 13 44.765 +36 38 02.49 13.88 13.40 13.25 12.86   ~ 224 0
45 NGC 4204 GiC 12 15 14.359 +20 39 32.68   14.3       ~ 162 0
46 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
47 NGC 4242 GiG 12 17 30.1835103480 +45 37 09.508940220   11.37 10.83     ~ 285 1
48 NGC 4288 GiG 12 20 38.119 +46 17 27.67   13.6       ~ 187 0
49 Z 244-7 GiG 12 21 15.01 +45 48 40.8   14.8       ~ 123 2
50 Z 335-12 AG? 12 24 25.30 +70 20 01.0 13.93 13.38 12.86 12.60   ~ 74 0
51 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1286 1
52 Z 187-44 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 217 0
53 Z 216-4 GiG 12 27 40.90 +43 29 44.0 13.75 13.10 12.7 12.33   ~ 270 0
54 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
55 MCG+07-26-010 EmG 12 28 44.078 +43 13 25.79   16.0       ~ 106 0
56 NGC 4455 EmG 12 28 44.1242000448 +22 49 13.538159508   15.5       ~ 222 0
57 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
58 Z 216-10 LSB 12 32 26.893 +42 42 14.84   13.7       ~ 130 0
59 IC 3687 GiG 12 42 15.1540831512 +38 30 05.844632940   15.5       ~ 153 0
60 MCG+06-28-024 GiC 12 44 24.881 +34 23 03.33   15.0       ~ 72 0
61 NGC 4707 AG? 12 48 21.666 +51 09 53.81   15.2       ~ 113 0
62 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
63 IC 4182 BiC 13 05 48.7478324064 +37 36 12.965157684   11.86   11.40   ~ 344 1
64 Z 316-9 AG? 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 268 1
65 NGC 5023 EmG 13 12 11.8036148808 +44 02 17.328663600   13.2       ~ 265 0
66 Z 245-38 AG? 13 15 29.753 +47 29 58.69   15.6       ~ 114 1
67 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 494 0
68 NGC 5229 LSB 13 34 02.831 +47 54 55.68   14.6       ~ 149 0
69 Z 218-40 AG? 13 42 32.52057 +39 39 30.5732   15.7       ~ 42 0
70 Z 272-13 AG? 13 54 45.602 +53 54 20.06   14.2       ~ 219 0
71 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
72 Z 247-23 AG? 14 22 32.1696941112 +45 23 01.932649116   15.7       ~ 78 0
73 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 424 1
74 Z 319-21 AG? 15 41 47.85 +67 15 15.3 15.71 15.22 14.81 14.44   ~ 93 0
75 Z 251-4 AG? 16 16 17.9000468088 +47 02 43.128874644   14.9       ~ 151 0
76 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
77 Z 304-5 LSB 20 24 00.6851855760 +60 11 41.414285040   14.5       ~ 77 0
78 Z 471-1 AG? 21 14 31.75 +26 44 04.5   15.6       ~ 64 0
79 Z 343-3 AG? 21 56 24.148 +73 15 39.33   15.2       ~ 102 0
80 Z 514-45 GiG 22 30 33.98 +33 49 10.8   15.5       ~ 73 0
81 Z 533-8 GiG 23 29 58.540 +40 59 31.98   15.7       ~ 110 0
82 Z 476-106 GiP 23 40 39.86 +26 14 11.1   14.5       ~ 146 0

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