2006ApJ...645..228A

Query : 2006ApJ...645..228A

2006ApJ...645..228A - Astrophys. J., 645, 228-239 (2006/July-1)

The peculiar velocities of satellites of external disk galaxies.

AZZARO M., ZENTNER A.R., PRADA F. and KLYPIN A.A.

Abstract (from CDS):

We analyze the angular distribution and the orbital rotation directions of a sample of carefully selected satellite galaxies about disk galaxy primaries extracted from the Sloan Digital Sky Survey (SDSS). We complement this analysis with a theoretical study of these statistics in an N-body simulation of cosmological structure formation set within the ΛCDM paradigm under various assumptions for the orientations of disk angular momenta. Under the assumption that the angular momenta of the disks are aligned with the angular momenta of the inner regions of their host dark matter halos, we find that the fraction of simulated satellite halos that exhibit prograde motion is fprog~0.55-0.60, with larger satellites more likely to be prograde. In our observational sample, approximately 60% of the satellites exhibit prograde motion, a result that is broadly consistent with the simulated sample. Our observational sample of satellite galaxies shows no evidence for an anisotropic satellite distribution relative to disk primaries; however, the small sample size does not yet support a statistically significant comparison to previous studies of satellite anisotropy. Again, this result is broadly consistent with our simulated sample of satellites under the assumption that disk and halo angular momenta are aligned. However, the small size of our observational sample does not yet allow us to distinguish between various assumptions regarding the orientations of disks in their halos. Finally, we present an assessment of the importance of contamination by interlopers on the measured prograde and retrograde statistics.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - Galaxies: Formation - Galaxies: Kinematics and Dynamics

VizieR on-line data: <Available at CDS (J/ApJ/645/228): table3.dat>

Nomenclature: Table 3: [AZP2006] PGC NNNNNNN a, [AZP2006] MCG +FF+FF-NNN a, [AZP2006] NGC NNNN a, [AZP2006] UGC NNNNN a, [AZP2006] IC NNNN a, [AZP2006] CGCG NN-NN a, N=66.

Simbad objects: 110

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Number of rows : 110
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 MCG+00-01-056 G 00 16 54.9165476280 -00 05 17.574042372   15   16.38   ~ 17 0
2 LEDA 1150904 G 00 17 07.43137 -00 08 30.1962           ~ 8 0
3 MCG-02-02-030 Sy2 00 30 07.308 -11 06 49.19   13   12.65   ~ 77 0
4 SDSS J003127.54-104033.1 AG? 00 31 27.54467 -10 40 33.3269           ~ 8 0
5 MCG-02-03-061 LIN 01 00 04.1299820184 -11 04 57.407324052   13   13.10   ~ 34 0
6 LEDA 970679 AG? 01 00 05.3212720824 -11 02 31.784983836           ~ 6 0
7 NGC 341A Sy1 01 00 45.813 -09 11 08.75   14.1   13.8 13.4 ~ 61 0
8 LEDA 992557 AG? 01 01 43.57 -09 19 00.8           ~ 6 0
9 Z 388-24 GiG 02 28 54.704 +00 22 13.33   14.6       ~ 38 0
10 LEDA 135653 LSB 02 29 33.888 +00 22 23.22   18.2       ~ 18 0
11 2MASS J02293929+0007234 AG? 02 29 39.2695174992 +00 07 23.668730796           ~ 9 0
12 SDSS J023534.50+003952.8 AG? 02 35 34.50234 +00 39 52.8799           ~ 8 0
13 Z 388-61 GiG 02 36 23.587 +00 42 31.01   14.9   14.4 14.6 ~ 54 0
14 SDSS J023740.28-083014.9 G 02 37 40.2830146776 -08 30 15.019517124           ~ 3 0
15 LEDA 1004542 G 02 38 01.87068 -08 22 25.2448           ~ 5 0
16 LEDA 1004578 Sy2 02 38 05.5719275376 -08 22 09.531530616   15.55   14.49   ~ 11 0
17 NGC 1032 AG? 02 39 23.6373 +01 05 37.652   13.2       ~ 102 1
18 LEDA 1189777 AG? 02 39 26.92 +01 16 19.8           ~ 10 0
19 LEDA 1179432 AG? 02 41 05.1397279128 +00 55 53.134462596           ~ 8 0
20 Z 389-36 G 02 51 54.5872041240 +00 39 53.556757632   15.7       ~ 34 0
21 LEDA 1171864 Q? 02 51 57.23154 +00 39 23.9810   18.41 17.79     ~ 6 0
22 SDSS J025219.69+004254.3 G 02 52 19.69856 +00 42 53.6732           ~ 4 0
23 LEDA 1136504 G 03 01 25.7 -00 42 58           ~ 4 0
24 Z 389-62 AGN 03 01 44.4222953232 -00 35 33.601986816   15.2       ~ 27 0
25 LEDA 4014677 G 03 01 48.13951 -00 37 29.1178           ~ 5 0
26 Z 390-61 AG? 03 20 03.8215495632 +01 21 41.451864552   14.6   14.6 14.3 ~ 41 0
27 LEDA 1189416 G 03 20 23.44056 +01 15 34.6211           ~ 6 0
28 LEDA 4014695 G 03 21 02.38 +01 13 28.9           ~ 3 0
29 LEDA 2192022 Sy2 07 47 08.9086161960 +42 04 43.240576368           ~ 27 0
30 LEDA 3995776 G 07 47 17.089 +42 04 56.43           ~ 5 0
31 Mrk 92 AG? 08 35 39.93167 +46 29 27.9600   15.0       ~ 29 1
32 2MASS J08354888+4628305 AG? 08 35 48.89488 +46 28 30.4699           ~ 4 0
33 2MASS J08393548+5224196 AG? 08 39 35.52526 +52 24 19.8444           ~ 4 0
34 Z 263-68 LIN 08 40 09.4630616016 +52 27 21.422116944   14.38       ~ 49 1
35 SDSS J084132.81+522920.8 AG? 08 41 32.877 +52 29 24.71           ~ 12 0
36 SDSS J085618.57+540818.4 AG? 08 56 18.571 +54 08 18.40           ~ 5 0
37 NGC 2701 AG? 08 59 05.7548164296 +53 46 17.613711228   12.3       ~ 112 0
38 LEDA 3997540 AG? 09 12 48.340 +48 54 17.31           ~ 6 0
39 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
40 [PVK2003] 139.85000 +51.10000 G 09 19 24.00 +51 06 00.0           ~ 2 0
41 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1113 1
42 MCG+09-16-010 AG? 09 23 17.047 +51 58 22.70   16       ~ 14 0
43 MCG+09-16-023 LSB 09 28 49.65 +51 33 37.8   16.5       ~ 34 0
44 LEDA 213645 AG? 09 52 25.03766 +02 10 51.4969           ~ 16 0
45 SDSS J095226.83+021644.1 AG? 09 52 26.838 +02 16 44.14           ~ 9 0
46 NGC 3039 Sy2 09 52 29.6661338304 +02 09 16.019195292   14.4       ~ 43 0
47 LEDA 28594 AG? 09 54 55.046 +56 36 27.95   17       ~ 12 0
48 NGC 3043 GiG 09 56 14.8639982064 +59 18 25.711853148   13.30       ~ 96 0
49 NGC 3062 LIN 09 56 35.7911075760 +01 25 42.683391948   15.1   14.453   ~ 31 0
50 LEDA 1197768 G 09 56 54.62 +01 31 59.1   17.085   16.209   ~ 9 0
51 LEDA 28747 AG? 09 57 22.420 +58 59 28.75   16       ~ 15 0
52 NGC 3073 EmG 10 00 52.0678224264 +55 37 07.881619152 14.12 14.07 13.40     ~ 201 2
53 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
54 IC 673 Sy2 11 09 25.2839934312 -00 05 51.873740016   14.06   13.646 14.1 ~ 68 1
55 SDSS J111017.67-001550.5 AG? 11 10 17.67722 -00 15 50.4427   18.39       ~ 5 0
56 LEDA 1131295 G 11 39 54.3309971520 -00 55 21.722639556   18.086   17.056   ~ 9 0
57 Z 12-53 G 11 40 06.2093118048 -00 54 04.996396368   15.1   13.965   ~ 32 0
58 LEDA 1130132 G 11 41 00.390 -00 58 12.73   18.322   17.681   ~ 11 0
59 LEDA 1225465 AG? 11 41 50.927 +02 23 34.59           ~ 10 0
60 Z 40-31 AG? 11 41 52.18380 +02 34 55.1649   15.3       ~ 23 0
61 Z 15-28 G 12 51 56.0303133264 -02 04 39.121738320   14.8       ~ 20 0
62 LEDA 1103226 G 12 51 59.528 -02 02 27.45   17.998   17.514   ~ 7 0
63 LEDA 1098115 G 12 52 22.38888 -02 13 32.9124   18.237   17.523   ~ 6 0
64 LEDA 1069297 G 12 54 05.26547 -03 35 28.4199   17.850   16.870   ~ 4 0
65 Z 15-34 LSB 12 54 19.164 -03 42 52.88   15.0       ~ 24 0
66 2dFGRS TGN257Z111 GiC 13 00 49.158 -01 21 36.41   17.518   16.840   ~ 5 0
67 Z 15-54 Sy1 13 00 54.500 -01 20 47.94   16.00 18.19 14.95   ~ 20 0
68 NGC 5084 Sy2 13 20 16.923 -21 49 39.28   11.15 12.21 9.84 10.5 ~ 192 1
69 Z 46-80 LIN 14 17 32.1509666688 +04 33 43.593650100   14.9       ~ 23 0
70 SDSS J141742.96+042336.6 G 14 17 43.02 +04 23 36.7           ~ 2 0
71 LEDA 2573480 AG? 14 31 46.895 +58 00 30.90           ~ 8 0
72 NGC 5678 SyG 14 32 05.5700264952 +57 55 17.155392060   12.10       ~ 240 1
73 Z 296-23 EmG 15 05 35.0654355096 +58 04 19.529365548   15.60       ~ 26 0
74 LEDA 2576061 G 15 06 53.83262 +58 13 27.1410           ~ 9 0
75 MCG+10-22-011 G 15 18 21.3926781528 +58 06 43.579675908   16       ~ 18 0
76 SDSS J151908.27+581313.1 G 15 19 08.2833004752 +58 13 13.213761996           ~ 6 0
77 NGC 5921 AG? 15 21 56.561 +05 04 13.94   12.7       ~ 286 0
78 SDSS J152259.99+043100.1 G 15 22 59.99760 +04 31 00.1812           ~ 2 0
79 Z 50-91 AG? 15 45 00.358 +02 28 04.86   15.2       ~ 22 0
80 Z 50-93 rG 15 45 45.916 +02 24 35.49   15.0       ~ 46 0
81 Z 50-95 GiG 15 46 01.3159974888 +02 42 51.243200712   15.4       ~ 19 0
82 NGC 5990 Sy2 15 46 16.3702704024 +02 24 55.693907820   13.1       ~ 158 1
83 Z 251-5 AGN 16 16 17.92379 +47 58 53.7539   15.6       ~ 41 0
84 SDSS J161631.31+481115.7 AG? 16 16 31.31764 +48 11 15.7626           ~ 4 0
85 SDSS J164556.50+430007.6 G 16 45 56.52 +43 00 07.2           ~ 2 0
86 Z 224-101 Sy2 16 46 34.8375178344 +43 01 07.330849968   18.28 17.57     ~ 23 0
87 LEDA 2660794 AG? 16 49 45.102 +63 46 09.71           ~ 4 0
88 SDSS J165109.89+633448.8 AG? 16 51 09.94 +63 34 48.5           ~ 3 0
89 NGC 6260 AG? 16 51 50.6182084512 +63 42 52.462726488   15.8       ~ 27 0
90 MCG+06-37-015 LIN 16 55 10.5364549152 +36 54 22.688316972   16.0       ~ 33 0
91 LEDA 3389133 G 16 55 21.586 +36 52 46.29           ~ 5 0
92 LEDA 2660223 EmG 17 00 26.2683544200 +63 43 40.822285080           ~ 21 0
93 IC 1241 AG? 17 01 28.2188664887 +63 41 27.886805487   16.2       ~ 43 0
94 LEDA 2661312 EmG 17 04 57.25850 +63 48 47.7621           ~ 11 0
95 Z 300-28 LIN 17 26 13.7396617320 +62 08 57.989556420   15.5       ~ 49 0
96 SDSS J172621.18+620828.0 G 17 26 21.184 +62 08 27.97           ~ 4 0
97 SDSS J210813.99-055108.0 G 21 08 14.01 -05 51 07.9           ~ 2 0
98 MCG-01-54-001 EmG 21 08 27.0449454120 -05 49 12.074195964   15.5       ~ 20 0
99 [PVK2003] 345.05508 +13.39191 G 23 00 13.2198301728 +13 23 30.829205328           ~ 3 0
100 SDSS J230015.95+133508.5 G 23 00 15.9484328544 +13 35 08.562605028           ~ 4 0
101 Z 430-46 G 23 00 46.1960822496 +13 37 07.888467216   15.3       ~ 32 0
102 SDSS J230053.51+132209.9 G 23 00 53.51 +13 22 10.1           ~ 2 0
103 SDSS J230104.97+135005.1 G 23 01 04.9727320536 +13 50 05.208600948           ~ 2 0
104 LEDA 3374715 G 23 02 20.69428 +13 24 45.5817           ~ 5 0
105 Z 430-54 LIN 23 02 40.3119732216 +13 19 44.670566676   15.3       ~ 44 0
106 SDSS J230928.28+151541.9 G 23 09 28.281 +15 15 41.95           ~ 5 0
107 LEDA 2817445 G 23 09 31.0655256768 +15 00 25.134945768           ~ 21 0
108 LEDA 1159176 G 23 14 19.44745 +00 10 57.9686           ~ 15 0
109 Z 380-14 LSB 23 14 33.135 +00 14 09.20   14.4       ~ 46 0
110 NAME Local Group GrG ~ ~           ~ 9325 0

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