2022MNRAS.511.1860S

Query : 2022MNRAS.511.1860S

2022MNRAS.511.1860S - Mon. Not. R. Astron. Soc., 511, 1860-1876 (2022/April-1)

The spatial distribution of globular clusters in dwarf spheroidal galaxies and the timing problem.

SANCHEZ-SALCEDO F.J. and LORA V.

Abstract (from CDS):

The dynamical friction time-scale of massive globular clusters (GCs) in the inner regions of cuspy dark haloes in dwarf spheroidal (dSph) galaxies can be much shorter than the Hubble time. This implies that a small fraction of the GCs is expected to be caught close to the centre of these galaxies. We compare the radial distribution of GCs predicted in simple Monte Carlo models with that of a sample of 38 spectroscopically confirmed GCs plus 17 GC candidates associated mainly with low-luminosity dSph galaxies. If dark matter haloes follow an NFW profile, the observed number of off-centre GCs at projected distances less than one-half the galaxy effective radius is significantly higher than the models predict. This timing problem can be viewed as a fine-tuning of the starting GC distances. As a result of the short sinking time-scale for GCs in the central regions, the radial distribution of GCs is expected to evolve significantly during the next 1-2 Gyr. However, dark matter haloes with cores of size comparable to the galaxy effective radii can lead to a slow orbital inspiral of GCs in the central regions of these galaxies, providing a simple solution to the timing problem. We also examine any indication of mass segregation in the summed distribution of our sample of GCs.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: dwarf - galaxies: kinematics and dynamics - galaxies: star clusters: general

Simbad objects: 89

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Number of rows : 89
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 NAME Sculptor dE1 GiG 00 23 51.7 -24 42 18   17.73       ~ 71 1
2 NAME Scl-dE1 GC1 GlC 00 23 52.69 -24 41 58.0           ~ 8 0
3 [SPM2005] E294-010-3-1104 Gl? 00 26 32.6 -41 51 10           ~ 3 0
4 ESO 294-10 AG? 00 26 33.37 -41 51 19.1   15.76 15.3 14.97   ~ 122 2
5 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
6 NAME Gep I GlC 00 30 10.579 +46 51 05.58           ~ 2 0
7 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
8 NAME AndI-GC1 GlC 00 45 42.9 +38 01 54           ~ 2 0
9 [SPM2005] E540-030-4-1183 Gl? 00 49 20.6 -18 02 51           ~ 3 0
10 ESO 540-30 AG? 00 49 20.96 -18 04 31.5   16.45   15.33   ~ 92 1
11 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
12 LEDA 9140 G 02 24 40.9 -73 30 48   16.0       ~ 41 0
13 [KMM2015] GC GlC 02 24 43.45 -73 30 50.1     18.30   17.41 ~ 3 0
14 NAME Fornax H1 Cl* 02 37 02.1 -34 11 00     16.59     ~ 107 0
15 NAME Fornax H2 GlC 02 38 44.24 -34 48 30.5   14.5       ~ 93 0
16 NAME Fornax H3 GlC 02 39 48.16 -34 15 28.6   13.59       ~ 131 0
17 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
18 NAME Fornax H4 GlC 02 40 07.697 -34 32 10.59   15.18 13.91 14.08   ~ 112 0
19 NAME Fornax H5 GlC 02 42 21.111 -34 06 05.80   14.5       ~ 101 0
20 [KK98a] 032029.5-663004 G 03 21 05.7 -66 19 22           ~ 22 1
21 [SPM2005] KK27-4-721 Gl? 03 21 10.0 -66 18 26           ~ 3 0
22 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
23 NAME Eridanus II Cluster Cl* 03 44 22.20 -43 31 59.2           ~ 10 0
24 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
25 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
26 NAME F8D1-GC1 Gl? 09 44 39.3 +67 26 06           ~ 3 0
27 NAME F8D1 G 09 44 47.1 +67 26 19   14.60 13.85     ~ 80 0
28 [SPM2005] KK77-4-1165 Gl? 09 49 54.8 +67 30 37           ~ 3 0
29 [SPM2005] KK77-4-1162 Gl? 09 49 56.2 +67 31 11           ~ 3 0
30 [SPM2005] KK77-4-939 Gl? 09 50 00.3 +67 31 10           ~ 3 0
31 NAME F12D1 G 09 50 10.0 +67 30 24   15.6       ~ 58 1
32 LEDA 28731 G 09 57 02.7 +68 35 30   15.17       ~ 119 1
33 [SPM2005] KDG61-3-1325 Gl? 09 57 02.8 +68 35 35           ~ 3 0
34 UGC 5428 AG? 10 05 06.40 +66 33 32.0 17.89 16.82 16.09 15.73   ~ 113 1
35 [SPM2005] KDG63-3-1168 Gl? 10 05 07.2 +66 33 30           ~ 4 0
36 [JSR2014] S378 GlC 10 05 31.500 -07 45 02.87           ~ 8 0
37 [SPM2005] KK84-3-830 Gl? 10 05 35.0505458904 -07 44 59.140235220   20.82 20.25   19.08 ~ 6 0
38 UGCA 200 AG? 10 05 35.10 -07 45 00.0   17       ~ 36 1
39 [JSR2014] S406 Gl? 10 05 35.70 -07 44 25.2   22.28 21.55   20.41 ~ 5 0
40 [JSR2014] S400 Gl? 10 05 35.76 -07 44 06.9   23.31 22.63   21.63 ~ 6 0
41 [JSR2014] S398 Gl? 10 05 36.49 -07 45 16.3   22.94 22.41   21.31 ~ 6 0
42 [JSR2014] S404 GlC 10 05 36.83 -07 45 54.5   23.00     21.51 ~ 3 0
43 [GPH2009] IKN-04 Gl? 10 08 04.7819799624 +68 24 53.101254852           ~ 3 0
44 [GPH2009] IKN-03 Gl? 10 08 05.26 +68 24 33.8           ~ 4 0
45 [GPH2009] IKN-05 Gl? 10 08 05.5002881568 +68 24 57.380741568           ~ 4 0
46 NAME IKN G 10 08 05.9 +68 23 57           ~ 82 0
47 [GPH2009] IKN-01 Gl? 10 08 07.14 +68 23 36.6           ~ 3 0
48 [GPH2009] IKN-02 Gl? 10 08 10.79 +68 24 05.6           ~ 3 0
49 NAME Sextans A-GC1 GlC 10 10 43.80 -04 43 28.8     18.04   17.06 ~ 3 0
50 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
51 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
52 [SPM2005] DDO78-3-1082 Gl? 10 26 27.1 +67 39 10           ~ 2 0
53 DDO 78 G 10 26 27.9 +67 39 24   15.8       ~ 88 1
54 [SPM2005] DDO78-1-167 Gl? 10 26 28.3 +67 40 45           ~ 3 0
55 [SPM2005] BK6N-4-789 Gl? 10 34 19.8 +66 00 32           ~ 3 0
56 [SPM2005] BK6N-2-524 Gl? 10 34 29.3 +66 01 29           ~ 3 0
57 LEDA 31286 G 10 34 31.9 +66 00 42   16.7       ~ 52 1
58 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
59 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
60 [GPH2009] E269-66-04 Gl? 13 13 03.12 -44 53 40.2           ~ 2 0
61 [GPH2009] E269-66-03 GlC 13 13 08.8252754640 -44 53 21.692375448           ~ 3 0
62 ESO 269-66 GiC 13 13 09.2 -44 53 23   14.14       ~ 64 0
63 [GPH2009] E269-66-01 Gl? 13 13 10.2860679144 -44 53 00.072327228           ~ 2 0
64 [GPH2009] E269-66-05 Gl? 13 13 11.79 -44 53 09.8           ~ 2 0
65 [GPH2009] KK197-01 GlC 13 21 59.81 -42 32 06.5           ~ 4 0
66 LEDA 46680 G 13 22 01.0 -42 32 08   16.6       ~ 63 0
67 [FMR2020] KK197-NSC Cl* 13 22 02.05 -42 32 07.3           ~ 5 0
68 [GPH2009] KK197-03 GlC 13 22 02.53 -42 32 13.8           ~ 4 0
69 LEDA 2815822 G 13 22 12.0 -42 43 51   18.5       ~ 41 0
70 [GPH2009] KKS55-01 Gl? 13 22 12.41 -42 45 11.8           ~ 3 0
71 [SPM2005] KK211-3-149 Gl? 13 42 05.6 -45 12 20   20.64 19.95   19.13 ~ 4 0
72 LEDA 48515 G 13 42 05.7 -45 12 20   17.6       ~ 49 1
73 [SPM2005] KK211-3-917 Gl? 13 42 08.0 -45 12 29   21.84 20.91   20.20 ~ 4 0
74 [FMR2020] KKs58-NSC Cl* 13 46 00.8 -36 19 44           ~ 2 0
75 LEDA 2815824 G 13 46 01.0 -36 19 41   17.1       ~ 27 0
76 [PS2008] KK 221-27n GlC 13 48 39.0 -46 59 49   22.26     20.52 ~ 2 0
77 [PS2008] KK 221-24n GlC 13 48 43.6 -46 58 59   20.70     19.07 ~ 2 0
78 LEDA 166179 G 13 48 46.4 -46 59 46           ~ 36 1
79 [SPM2005] KK221-2-1090 Gl? 13 48 49.4 -47 00 14   21.20 20.23   19.57 ~ 3 0
80 [SPM2005] KK221-2-966 Gl? 13 48 50.3 -47 00 10   19.20 18.20   17.42 ~ 4 0
81 [SPM2005] KK221-2-883 Gl? 13 48 52.8 -47 00 19   22.07 20.93   20.18 ~ 4 0
82 [SPM2005] KK221-2-608 Gl? 13 48 54.9 -47 00 10   21.08 19.96   19.23 ~ 4 0
83 [GPH2009] E384-16-01 Gl? 13 56 54.28 -35 18 26.0           ~ 2 0
84 [GPH2009] E384-16-02 Gl? 13 56 59.90 -35 19 37.2           ~ 2 0
85 ESO 384-16 AG? 13 57 01.37 -35 19 58.7   14.80   14.10 14.81 ~ 62 0
86 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
87 [HM82] A1 GlC 23 28 26.30 +14 44 25.2           ~ 4 0
88 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
89 NAME Local Group GrG ~ ~           ~ 9325 0

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