2009A&A...493..871S

Query : 2009A&A...493..871S

2009A&A...493..871S - Astronomy and Astrophysics, volume 493871-892 (2009/1-3)

The rotation curves shapes of late-type dwarf galaxies.

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

Abstract (from CDS):

We present rotation curves derived from HI observations for a sample of 62 galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project. These rotation curves have been derived by interactively fitting model data cubes to the observed cubes. This procedure takes the rotation curve shape, the HI distribution, the inclination, and the size of the beam into account, and makes it possible to correct for the effects of beam smearing. A comparison with higher spatial resolution Hα rotation curves available in the literature shows that there is general agreement between the two. The late-type dwarf galaxies in our sample have rotation-curve shapes that are similar to those of late-type spiral galaxies, in the sense that their rotation curves, when expressed in units of disk scale lengths, rise as steeply in the inner parts and start to flatten at two disk scale lengths. None of the galaxies in our sample have solid-body rotation curves that extend beyond three disk scale lengths. The logarithmic slopes between two disk scale lengths and the last measured point on the rotation curve is similar between late-type dwarf and spiral galaxies. Thus, whether the flat part of the rotation curve is reached or not seems to depend more on the extent of the rotation curve than on its amplitude. We also find that the outer rotation curve shape does not strongly depend on luminosity, at least for galaxies fainter than MR~-19. We find that in spiral galaxies and even in the central regions of late-type dwarf galaxies, the shape of the central distribution of light and the inner rise of the rotation curve are related. This implies that galaxies with stronger central concentrations of light also have higher central mass densities, and it suggests that the luminous mass dominates the gravitational potential in the central regions, even in low surface brightness dwarf galaxies.

Abstract Copyright: ∼

Journal keyword(s): surveys - galaxies: dwarf - galaxies: irregular - galaxies: kinematics and dynamics

Simbad objects: 119

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Number of rows : 119
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 IC 5378 IG 00 02 37.8 +16 38 51           ~ 26 0
2 IC 5378S G 00 02 37.9162887864 +16 38 37.533439932   14.9       ~ 26 0
3 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
4 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 480 2
5 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
6 UGC 731 AG? 01 10 43.98 +49 36 07.9   17       ~ 103 0
7 IC 1727 GiP 01 47 29.890 +27 20 00.06   12.54 11.98 11.77   ~ 216 0
8 Z 503-26 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 171 0
9 NGC 801 AGN 02 03 44.7926518608 +38 15 31.615649064   14.23 13.47     ~ 186 0
10 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1741 2
11 Z 505-6 GiG 02 33 18.20 +33 29 28.0   14.9   13.59   ~ 91 0
12 Z 539-46 GiG 02 33 42.96 +40 31 41.2   15.0   13.45   ~ 71 0
13 Z 505-16 AG? 02 34 29.31 +29 44 59.4   15.7       ~ 59 0
14 Z 524-20 GiP 02 47 55.4194406880 +37 32 18.528735876   14.3   12.8   ~ 131 0
15 NGC 1156 GiG 02 59 42.8528847264 +25 14 28.352017320 12.13 12.32 11.74     ~ 323 1
16 NGC 1324 SyG 03 25 01.6816298256 -05 44 44.975701104   14   12.31   ~ 78 0
17 UGC 2849 GiG 03 45 32.9196164448 +44 51 17.423865180   17       ~ 27 0
18 Z 526-12 AG? 03 53 02.4589142328 +35 35 22.174136556   14.4       ~ 152 0
19 NGC 1560 GiG 04 32 49.087 +71 52 59.20   12.1       ~ 264 0
20 Z 347-7 AG? 04 46 16.976 +76 25 08.04   15.5       ~ 75 0
21 MCG+13-05-007a AG? 05 56 35.98 +75 19 01.9   17       ~ 89 0
22 UGC 3698 AG? 07 09 18.75 +44 22 48.2   17       ~ 45 0
23 NGC 2337 rG 07 10 13.6374445464 +44 27 26.716619844   13.1       ~ 94 1
24 UGC 3817 G 07 22 44.48 +45 06 30.7   17       ~ 49 0
25 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
26 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
27 MCG+07-16-011 AG? 07 41 25.777 +40 06 46.05   16.0       ~ 125 0
28 Z 349-16 AG? 08 07 10.05 +80 07 36.5   15.7       ~ 53 0
29 NGC 2537 H2G 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 314 2
30 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 253 1
31 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
32 NGC 2552 EmG 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 284 1
33 Z 263-63 GiP 08 37 41.489 +51 39 08.58   13.50       ~ 149 1
34 Z 237-13 G 08 43 21.8462696016 +45 44 09.601368324   15.1       ~ 71 0
35 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1113 1
36 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
37 NGC 2955 GiG 09 41 16.6170758448 +35 52 56.147040624   13.90       ~ 116 0
38 NGC 2998 LIN 09 48 43.6305155160 +44 04 53.217027660   13.3       ~ 231 0
39 Z 152-72 EmG 09 50 22.769 +31 29 17.80   14.48   14.10   ~ 207 0
40 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
41 NGC 3104 AG? 10 03 57.185 +40 45 41.43   14.2       ~ 142 0
42 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 946 1
43 NGC 3274 EmG 10 32 17.2253817864 +27 40 07.165226244   13.30   12.77   ~ 261 0
44 Z 184-6 AG? 10 42 42.787 +34 26 57.39   13.31 13.09 12.84 12.85 ~ 173 0
45 Z 290-65 AG? 10 44 28.536 +60 22 01.39   15.4       ~ 58 0
46 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
47 NGC 3396 GiP 10 49 55.939 +32 59 26.44   12.6 12.50     ~ 214 1
48 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
49 NAME UMa Region reg 11 00 +50.0           ~ 333 0
50 Z 268-28 AG? 11 23 23.2200537264 +50 53 33.503083728   14.9       ~ 116 0
51 Z 268-36 GiC 11 26 40.4656762968 +53 44 48.012539280   14.5       ~ 164 0
52 NGC 3726 G 11 33 21.1367545656 +47 01 45.280222428   11.11   10.02   ~ 374 0
53 Z 242-72 AG? 11 40 05.7497793984 +45 56 31.750795896   14.6       ~ 87 0
54 NGC 3877 GiG 11 46 07.782 +47 29 40.20   11.8       ~ 347 0
55 NGC 3917 GiP 11 50 45.4481861760 +51 49 27.919475076   12.5       ~ 201 0
56 Z 214-32 AG? 11 50 52.98254 +38 52 50.6594   13.72 13.9 13.39   ~ 175 0
57 NGC 3949 GiC 11 53 41.7311041896 +47 51 31.401451476   10.9       ~ 351 1
58 NGC 3953 GiG 11 53 49.0086582552 +52 19 36.475395312   11.08   9.71   ~ 380 0
59 NGC 3972 GiG 11 55 45.09048 +55 19 14.6460   13.14   11.94   ~ 242 1
60 Z 269-18 GiG 11 56 28.76784 +50 25 42.0132   14.0       ~ 148 0
61 NGC 3985 GiG 11 56 42.1288367760 +48 20 03.129462132   13.0       ~ 122 0
62 Z 269-22 GiC 11 56 49.526 +53 09 37.21   13.90   12.96   ~ 155 0
63 M 109 GiG 11 57 35.9631479640 +53 22 29.006082336   10.94   9.57   ~ 483 0
64 NGC 3995 GiG 11 57 44.09779 +32 17 38.6411   12.81       ~ 170 0
65 MCG+09-20-050 AG? 11 58 25.96 +50 55 03.4   17       ~ 67 0
66 Z 269-28 GiC 11 59 08.734 +52 42 28.03   14.5       ~ 182 0
67 NGC 4068 AG? 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 189 0
68 Z 215-23 GiP 12 05 57.746 +43 08 36.08   14.40       ~ 123 1
69 NGC 4100 GiG 12 06 08.602 +49 34 56.32   11.7       ~ 269 0
70 Z 187-12 AG? 12 08 41.514 +36 48 08.27   14.7       ~ 89 0
71 NGC 4138 Sy2 12 09 29.8011417048 +43 41 06.864140004 12.46 12.29 11.32 10.82   ~ 436 1
72 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 260 0
73 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 238 0
74 NGC 4190 LSB 12 13 44.765 +36 38 02.49 13.88 13.40 13.25 12.86   ~ 224 0
75 NGC 4204 GiC 12 15 14.359 +20 39 32.68   14.3       ~ 162 0
76 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
77 NGC 4218 GiP 12 15 46.1787155088 +48 07 52.628679084   13.2       ~ 96 0
78 NGC 4242 GiG 12 17 30.1835103480 +45 37 09.508940220   11.37 10.83     ~ 285 1
79 NGC 4288 GiG 12 20 38.119 +46 17 27.67   13.6       ~ 187 0
80 Z 244-7 GiG 12 21 15.01 +45 48 40.8   14.8       ~ 123 2
81 Z 335-12 AG? 12 24 25.30 +70 20 01.0 13.93 13.38 12.86 12.60   ~ 74 0
82 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1286 1
83 Z 187-44 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 217 0
84 Z 216-4 GiG 12 27 40.90 +43 29 44.0 13.75 13.10 12.7 12.33   ~ 270 0
85 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
86 MCG+07-26-010 EmG 12 28 44.078 +43 13 25.79   16.0       ~ 106 0
87 NGC 4455 EmG 12 28 44.1242000448 +22 49 13.538159508   15.5       ~ 222 0
88 Z 216-10 LSB 12 32 26.893 +42 42 14.84   13.7       ~ 130 0
89 IC 3687 GiG 12 42 15.1540831512 +38 30 05.844632940   15.5       ~ 153 0
90 MCG+06-28-024 GiC 12 44 24.881 +34 23 03.33   15.0       ~ 72 0
91 NGC 4707 AG? 12 48 21.666 +51 09 53.81   15.2       ~ 113 0
92 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
93 IC 4182 BiC 13 05 48.7478324064 +37 36 12.965157684   11.86   11.40   ~ 344 1
94 Z 316-9 AG? 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 268 1
95 NGC 5023 EmG 13 12 11.8036148808 +44 02 17.328663600   13.2       ~ 265 0
96 NGC 5033 Sy2 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 909 1
97 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
98 Z 245-38 AG? 13 15 29.753 +47 29 58.69   15.6       ~ 114 1
99 MCG+04-31-016 GiC 13 15 53.77848 +25 26 10.1328   17       ~ 124 0
100 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 494 0
101 NGC 5229 LSB 13 34 02.831 +47 54 55.68   14.6       ~ 149 0
102 Z 218-40 AG? 13 42 32.52057 +39 39 30.5732   15.7       ~ 42 0
103 Z 272-13 AG? 13 54 45.602 +53 54 20.06   14.2       ~ 219 0
104 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
105 NGC 5533 Sy2 14 16 07.7507477232 +35 20 37.879981584   13.0       ~ 189 0
106 NGC 5585 GiG 14 19 48.204 +56 43 44.58   11.73 11.216 11.12 10.123 ~ 455 0
107 Z 247-23 AG? 14 22 32.1696941112 +45 23 01.932649116   15.7       ~ 78 0
108 Z 319-21 AG? 15 41 47.85 +67 15 15.3 15.71 15.22 14.81 14.44   ~ 93 0
109 Z 251-4 AG? 16 16 17.9000468088 +47 02 43.128874644   14.9       ~ 151 0
110 NGC 6195 SyG 16 36 32.5656632424 +39 01 40.411487460   14.7       ~ 109 0
111 NGC 6503 LIN 17 49 26.4207792072 +70 08 39.604132176 11.56 10.95 10.28 9.92   ~ 551 1
112 NGC 6674 AG? 18 38 33.889 +25 22 30.39   13.7       ~ 119 0
113 Z 304-5 LSB 20 24 00.6851855760 +60 11 41.414285040   14.5       ~ 77 0
114 Z 471-1 AG? 21 14 31.75 +26 44 04.5   15.6       ~ 64 0
115 Z 343-3 AG? 21 56 24.148 +73 15 39.33   15.2       ~ 102 0
116 Z 514-45 GiG 22 30 33.98 +33 49 10.8   15.5       ~ 73 0
117 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1284 2
118 Z 533-8 GiG 23 29 58.540 +40 59 31.98   15.7       ~ 110 0
119 Z 476-106 GiP 23 40 39.86 +26 14 11.1   14.5       ~ 146 0

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