2005AJ....129.2119S


Query : 2005AJ....129.2119S

2005AJ....129.2119S - Astron. J., 129, 2119-2137 (2005/May-0)

The cusp/core problem in galactic halos: long-slit spectra for a large dwarf galaxy sample.

SPEKKENS K., GIOVANELLI R. and HAYNES M.P.

Abstract (from CDS):

We derive inner dark matter halo density profiles for a sample of 165 low-mass galaxies using rotation curves obtained from high-quality, long-slit optical spectra assuming minimal disks and spherical symmetry. For ρ(r)∼r–α near the galaxy center, we measure median inner slopes ranging from αm=0.22±0.08 to 0.28±0.06 for various subsamples of the data. This is similar to values found by other authors and in stark contrast to the intrinsic cusps (αint∼1) predicted by simulations of halo assembly in cold dark matter (CDM) cosmologies. To elucidate the relationship between αmand αintin our data, we simulate long-slit observations of model galaxies with halo shapes broadly consistent with the CDM paradigm. Simulations with αint=1/2 and 1 recover both the observed distribution of αmand correlations between αmand primary observational parameters such as distance and disk inclination, whereas those with αint=5/4 are marginally consistent with the data. Conversely, the hypothesis that low-mass galaxies have αint=3/2 is rejected. While the simulations do not imply that the data favor intrinsic cusps over cores, they demonstrate that the discrepancy between αmand αint∼1 for our sample does not necessarily imply a genuine conflict between our results and CDM predictions; rather, the apparent cusp/core problem may be reconciled by considering the impact of observing and data-processing techniques on rotation curves derived from long-slit spectra.

Abstract Copyright:

Journal keyword(s): Cosmology: Dark Matter - Galaxies: Dwarf - Galaxies: Halos - Galaxies: Kinematics and Dynamics - Galaxies: Structure

VizieR on-line data: <Available at CDS (J/AJ/129/2119): table1.dat>

Simbad objects: 165

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Number of rows : 165
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LEDA 265 GiC 00 03 51.6 -50 46 00   16.26       ~ 10 0
2 2MASX J00392547-5559041 G 00 39 25.477 -55 59 04.18   16.58   15.73   ~ 4 0
3 ESO 540-16 G 00 42 14.695 -18 09 42.47   14.32   13.41 13.8 ~ 53 0
4 MCG-02-03-014 G 00 47 25.490 -09 51 09.87   15   15.24   ~ 14 0
5 MCG+00-03-059 GiC 01 02 48.227 -01 28 25.52   15.0       ~ 16 0
6 LEDA 1116445 G 01 04 21.9 -01 31 58           ~ 3 0
7 2MFGC 773 H2G 01 04 41.546 -00 57 21.58   15.83   14.66   ~ 16 0
8 LEDA 524393 G 01 09 40.1 -45 39 08           ~ 3 0
9 ESO 113-21 G 01 11 12.52 -58 50 20.4   15.89       ~ 14 0
10 MCG+00-04-027 GiC 01 11 15.777 -00 27 21.42   16   15.47   ~ 12 0
11 ESO 244-1 GiC 01 12 19.018 -45 53 18.34 19.36 16.06 18.32 15.17 17.86 ~ 12 0
12 ESO 151-37 G 01 15 52.493 -54 33 17.45   15.40   14.21   ~ 10 0
13 Z 385-122 GiC 01 25 33.173 -01 48 42.19   15.8       ~ 13 0
14 MCG+00-04-147 GiG 01 26 43.498 -01 18 22.50   15.2       ~ 15 0
15 2MASX J01280350-0143135 GiC 01 28 03.519 -01 43 13.03           ~ 6 0
16 2MASX J01283412-0153339 GiC 01 28 34.132 -01 53 34.75           ~ 8 0
17 ESO 353-13 G 01 32 26.455 -34 36 31.32   15.35   14.11   ~ 12 0
18 ESO 13-16 G 01 32 48.4 -79 28 26   13.53   12.52 13.3 ~ 43 0
19 ESO 13-18 G 01 36 33.7 -80 20 49   16.12   15.25   ~ 16 0
20 LEDA 1094609 G 01 51 21.2 -02 20 48           ~ 6 0
21 2MASX J01524159-0325265 G 01 52 41.590 -03 25 26.57   16.5       ~ 8 0
22 ESO 354-30 GiG 02 01 14.551 -34 21 46.84   15.31   13.92   ~ 13 0
23 ESO 544-27 EmG 02 12 54.643 -19 19 00.90   15.44   14.22   ~ 50 0
24 ESO 298-36 G 02 21 58.988 -37 27 17.59   14.76   13.95 14.2 ~ 25 0
25 ESO 198-12 G 02 28 05.254 -47 51 22.47   15.68   13.99   ~ 13 0
26 ESO 355-26 EmG 02 32 17.508 -35 01 48.66   13.80   12.79 13.1 ~ 47 0
27 ESO 545-43 LSB 02 39 42.511 -21 14 23.96   15.03   14.22   ~ 17 0
28 LEDA 142796 G 02 54 41.9 +16 05 24           ~ 11 0
29 ESO 247-12 G 02 55 26.601 -42 22 05.81   16.15   15.49   ~ 10 0
30 IC 1913 GiC 03 19 34.578 -32 27 54.41   14.38   13.54 14.2 ~ 68 0
31 NGC 1414 GiP 03 40 57.135 -21 42 50.07   14.65   13.88   ~ 47 0
32 NGC 1484 EmG 03 54 17.99 -36 58 14.3   13.67   12.96 13.4 ~ 58 0
33 NGC 1518 EmG 04 06 49.708 -21 10 21.42   12.20 11.84 11.19 12.0 ~ 89 0
34 ESO 250-6 G 04 07 47.372 -45 02 23.76   16.03   14.98   ~ 13 0
35 ESO 550-24 G 04 21 13.632 -21 50 46.07   12.75   11.95 12.3 ~ 54 0
36 LEDA 944778 GiC 04 34 02.9 -12 58 57           ~ 7 0
37 6dFGS gJ043731.5-030614 G 04 37 31.278 -03 06 14.40   17.11   15.60   ~ 13 0
38 ESO 551-31 LSB 04 42 28.91 -21 41 30.1   15.10   14.15   ~ 27 0
39 ESO 85-69 G 05 19 16.692 -62 32 05.96   15.35       ~ 8 0
40 ESO 306-2 G 05 28 36.482 -41 29 28.03   15.81   14.93   ~ 17 0
41 ESO 555-22 LSB 06 01 07.987 -21 44 19.36   13.49   12.38   ~ 41 0
42 ESO 489-6 GiG 06 07 44.698 -23 29 11.98   13.43   12.41 12.9 ~ 37 0
43 2MFGC 5008 GiC 06 12 49.774 -34 15 08.09   16       ~ 14 0
44 ESO 489-50 LSB 06 24 38.917 -22 35 49.70   15.85   14.66   ~ 22 0
45 ESO 490-10 G 06 31 57.4927581561 -26 46 08.757219243   13.69   12.27 13.1 ~ 31 0
46 ESO 490-36 GiG 06 44 06.978 -27 10 31.40   14.97   13.22   ~ 36 0
47 ESO 58-17 G 06 49 31.172 -70 09 22.55   16.15   15.11   ~ 8 0
48 LEDA 480880 G 07 03 55.17 -49 03 41.6       18.39   ~ 7 0
49 MCG+08-13-066 G 07 08 26.3533890344 +48 59 49.736328136   16       ~ 6 0
50 MCG+08-13-070 G 07 08 47.369 +48 59 40.23   15.1   14.28   ~ 10 0
51 2MASX J07085858+4832432 G 07 08 58.581 +48 32 43.22           ~ 5 0
52 MCG+08-13-093 G 07 10 47.748 +48 13 25.86   15.5   15.01   ~ 9 0
53 ESO 35-3 G 07 14 17.485 -74 44 13.03   16.43   14.98   ~ 16 0
54 ESO 162-15 G 07 15 23.732 -55 04 34.86   14.75   14.51 14.4 ~ 20 0
55 ESO 58-28 G 07 20 34.0 -67 42 39   15.69   15.4 15.5 ~ 22 0
56 UGC 4257 GiG 08 10 11.233 +24 53 35.01   15.61 15.06 14.55 13.97 ~ 51 0
57 LEDA 2576227 G 08 16 51.836 +58 14 17.29           ~ 4 0
58 NGC 2550 GiG 08 24 33.640 +74 00 44.30   13.1       ~ 36 0
59 LEDA 82378 G 09 22 02.963 +33 51 51.78   17       ~ 10 0
60 ESO 373-12 G 09 38 07.566 -33 55 39.35   15.07   14.08 14.8 ~ 23 0
61 MCG-01-25-024 LSB 09 42 24.8 -06 15 29   14       ~ 37 0
62 Z 92-49 G 09 46 31.073 +15 53 10.36   15.3       ~ 17 0
63 ESO 374-39 G 10 09 56.451 -37 17 56.78   16.39   15.24   ~ 9 0
64 2dFGRS TGN288Z100 G 10 16 22.857 -01 04 24.14   17.736   16.584   ~ 8 0
65 2MFGC 8020 G 10 21 34.691 +23 57 32.43           ~ 16 0
66 2MFGC 8058 LSB 10 24 17.637 -05 40 40.39   15       ~ 14 0
67 ESO 375-68 GiG 10 34 19.010 -34 24 12.38   14.67   13.19   ~ 24 0
68 IC 625 EmG 10 42 37.8 -23 56 08   13.72   13.07 13.3 ~ 50 0
69 LEDA 4126661 G 10 44 05.807 +26 03 41.93           ~ 6 0
70 2MASX J11095362+2226586 GiC 11 09 53.664 +22 26 59.61           ~ 11 0
71 LEDA 2800819 GiC 11 10 20.1 +21 19 27           ~ 7 0
72 2MASXI J1110209+223105 LSB 11 10 20.6 +22 31 05           ~ 8 0
73 AGC 211465 G 11 20 20.0 +34 18 18           ~ 1 0
74 AGC 211468 G 11 20 43.303 +34 09 51.88           ~ 2 0
75 ESO 319-26 G 11 30 19.805 -41 03 58.11   15.99   15.55 15.3 ~ 25 0
76 2MFGC 9013 G 11 30 58.370 -04 05 06.09           ~ 8 0
77 ESO 503-22 G 11 33 29.246 -26 56 44.66   14.81   13.83   ~ 30 0
78 2MASX J11335627+4919532 GiC 11 33 56.260 +49 19 53.68           ~ 7 0
79 2MASX J11342606+4924482 GiC 11 34 26.059 +49 24 48.36           ~ 6 0
80 ESO 572-22 GiG 11 56 22.496 -19 33 07.45   15.00   13.89 14.4 ~ 42 0
81 ESO 572-49 G 12 03 24.4870719756 -19 31 22.119136199   14.69   13.81 14.3 ~ 41 0
82 ESO 441-24 G 12 15 56.129 -29 03 22.80   15.14   14.08   ~ 20 0
83 ESO 506-10 G 12 27 51.533 -25 50 42.92   16.75   15.62   ~ 13 0
84 IC 3474 H2G 12 32 36.928 +02 39 49.57   15.0       ~ 72 0
85 ESO 322-48 GiC 12 40 29.718 -41 04 11.38   15.21   14.10   ~ 27 0
86 ESO 507-9 G 12 47 24.8 -24 38 16   16.15   15.24   ~ 8 0
87 ESO 574-32 LSB 12 47 54.745 -21 55 42.69   15.53   14.06   ~ 25 0
88 ESO 322-93 GiC 12 49 04.149 -41 20 20.39   16.11 14.51 15.16   ~ 21 0
89 UGC 8067 GiG 12 57 12.166 -01 42 24.51   14.68   13.27 13.6 ~ 73 0
90 ESO 382-4 GiC 13 04 20.834 -35 13 39.69   15.06   14.46   ~ 21 0
91 ESO 508-11 GiG 13 07 44.8 -22 51 24   14.13   13.31 13.9 ~ 53 0
92 ESO 269-52 GiC 13 08 48.1 -43 40 33   16.11   15.02 15.5 ~ 28 0
93 ESO 443-80 G 13 11 09.0 -28 00 28   14.14   13.52 14.2 ~ 53 0
94 MCG-03-34-041 GiP 13 17 06.119 -16 15 07.80   13.5   13.45   ~ 55 0
95 ESO 382-41 G 13 19 28.762 -35 06 05.53   15.40   14.58 14.9 ~ 39 0
96 ESO 444-21 GiC 13 23 30.645 -30 06 51.31   15.60   14.81   ~ 51 0
97 LEDA 98016 GiC 13 26 38.4 -31 52 09           ~ 7 0
98 6dFGS gJ132826.3-264812 GiC 13 28 26.3 -26 48 11   16   16.36   ~ 9 0
99 LEDA 98584 GiC 13 28 56.077 -31 31 20.05       17.034   ~ 13 0
100 LEDA 2800823 G 13 34 57.1 -35 08 34           ~ 6 0
101 ESO 509-68 G 13 35 06.1 -26 45 01   16.11   15.16   ~ 8 0
102 IC 4295 GiC 13 36 34.460 -29 05 21.89   15.13   14.54   ~ 18 0
103 ESO 271-4 G 13 55 22.229 -44 28 41.90   14.63   13.64   ~ 20 0
104 ESO 445-85 G 13 58 27.854 -31 46 34.47   16.30   15.33   ~ 21 0
105 ESO 384-27 LSB 14 00 28.890 -34 37 13.07   15.04   13.94   ~ 19 0
106 UGC 8924 G 14 00 45.771 +02 01 19.33   14.7       ~ 36 0
107 6dFGS gJ140857.2-270257 G 14 08 57.1 -27 02 56   16.3       ~ 8 0
108 MCG+06-32-004 G 14 21 08.35 +35 17 45.6   16       ~ 11 0
109 NGC 5577 GiP 14 21 13.110 +03 26 08.76   13.05       ~ 115 1
110 2MASX J14245831+3521164 G 14 24 58.312 +35 21 16.42       15.82 15.35 ~ 8 0
111 ESO 447-27 G 14 36 36.010 -29 03 24.17   16.48   15.24   ~ 11 0
112 LEDA 91390 G 14 49 04.931 +17 10 53.14           ~ 10 0
113 ESO 580-46 G 14 51 44.498 -22 40 40.48   15.91   15.11   ~ 9 0
114 ESO 580-49 G 14 53 07.863 -19 44 12.98   15.18   14.07   ~ 38 0
115 ESO 581-6 G 14 58 03.0752711526 -19 23 28.196722380   15.62   14.45   ~ 31 0
116 LEDA 1315049 GiC 15 13 48.751 +07 09 16.26           ~ 9 0
117 ESO 328-48 G 15 24 10.675 -38 27 45.84   16.04   16.62 14.8 ~ 12 0
118 IC 1125 EmG 15 33 05.6001338352 -01 37 41.828328794   13.8   13.9 13.7 ~ 68 0
119 ESO 450-4 G 15 39 19.819 -29 59 48.42   16.70   15.84   ~ 10 0
120 IC 4555 GiG 15 48 14.850 -78 10 43.88   13.55   12.54 13.5 ~ 36 0
121 LEDA 1554167 GiC 16 06 44.608 +18 14 43.99           ~ 11 0
122 ESO 101-1 G 16 36 35.274 -66 00 24.66   14.75   13.70 14.6 ~ 13 0
123 LEDA 91570 G 16 51 50.9 +78 45 14           ~ 9 0
124 UGC 10641 G 16 58 06.467 +58 53 08.18   16.5       ~ 21 0
125 ESO 71-1 G 17 59 10.422 -67 56 17.20   16.56   15.26   ~ 9 0
126 ESO 102-19 G 17 59 24.470 -63 27 28.19   15.87   14.13   ~ 9 1
127 ESO 140-21 G 18 24 59.487 -60 03 39.76   15.49   14.18   ~ 13 0
128 ESO 183-5 G 18 39 02.790 -55 37 02.58   15.78   14.82   ~ 18 0
129 ESO 231-6 G 18 52 37.170 -51 28 04.05   15.66   14.63 14.9 ~ 22 0
130 ESO 282-29 G 19 14 36.599 -46 57 27.43   15.20   13.97   ~ 12 0
131 ESO 10-4 G 19 30 59.7 -86 00 56   14.00   13.10 13.2 ~ 26 0
132 ESO 283-8 G 19 34 54.6588252160 -46 08 08.772159029   15.13       ~ 8 0
133 LEDA 610260 G 19 59 31.8 -38 19 29           ~ 6 0
134 ESO 185-57 G 20 03 47.446 -54 58 26.04   15.92   15.23   ~ 7 0
135 IC 4936 G 20 05 52.178 -61 25 42.89   14.57   13.26 14.2 ~ 20 0
136 ESO 399-22 G 20 08 59.678 -35 19 14.92   16.66   15.62   ~ 8 0
137 ESO 233-36 GiP 20 09 34.358 -49 13 17.26   14.77       ~ 28 0
138 ESO 233-42 G 20 11 01.509 -48 41 26.67   15.11   13.88   ~ 30 0
139 ESO 233-43 G 20 11 11.8 -48 16 33   15.25   14.42 15.0 ~ 26 0
140 ESO 284-36 G 20 15 44.400 -43 08 00.13   15.76   14.50   ~ 11 0
141 ESO 400-2 G 20 16 19.006 -37 00 55.05   15.75       ~ 8 0
142 ESO 340-8 G 20 17 11.8389492626 -40 55 25.310683890   15.45   14.50 14.8 ~ 47 0
143 ESO 340-28 G 20 25 24.280 -40 09 41.37   15.04   14.06   ~ 8 0
144 ESO 596-52 G 20 31 18.303 -19 02 55.74   15.82       ~ 13 0
145 ESO 285-39 G 20 35 38.8 -43 36 24   15.69   14.66   ~ 7 0
146 IC 5026 G 20 48 28.0613082521 -78 04 09.171893345   15.48   14.12 14.5 ~ 50 0
147 LEDA 84971 GiC 20 51 04.7 -52 45 02   16       ~ 8 0
148 ESO 597-45 G 20 51 44.802 -18 19 54.30   15.19       ~ 9 0
149 IC 5078 G 21 02 31.2403113193 -16 49 05.380422382   12.8   12.60 12.7 ~ 58 0
150 LEDA 166813 G 21 07 00.4 -24 37 13           ~ 6 0
151 IC 5107 G 21 28 14.875 -65 44 07.71   15.17   14.22   ~ 11 0
152 ESO 403-14 G 21 41 49.402 -35 11 44.21   15.84   14.84   ~ 10 0
153 ESO 601-25 G 22 10 12.44 -18 51 54.8   14.73 14.13 13.88 14.3 ~ 33 0
154 ESO 237-49 G 22 16 03.4 -47 39 43   14.97   14.19 14.4 ~ 34 0
155 ESO 467-40 G 22 17 57.1 -27 31 43   16.03   15.27   ~ 9 0
156 IC 5220 G 22 28 02.725 -59 43 24.46   15.08   14.23   ~ 12 0
157 NGC 7349 G 22 41 14.1 -21 47 49   15.07 14.51 14.10   ~ 20 0
158 ESO 406-26 GiP 22 56 36.716 -36 14 58.94   13.46   12.36 12.8 ~ 79 0
159 ESO 109-32 G 23 03 46.443 -62 31 19.36   14.91   14.02 14.6 ~ 26 0
160 LEDA 85433 GiC 23 23 00.950 +16 47 57.98   17.31       ~ 10 0
161 LEDA 1461318 GiC 23 24 00.227 +14 33 48.39           ~ 11 0
162 LEDA 2800838 G 23 25 08.5 +16 22 38           ~ 7 0
163 UGC 12641 G 23 30 54.602 +20 15 02.81   15.5       ~ 33 0
164 ESO 605-22 G 23 39 03.22 -20 49 03.2   15.49   14.58   ~ 12 0
165 LEDA 2800842 GiC 23 43 13.9 +08 34 54           ~ 7 0

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2021.10.27-20:35:55

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