2022MNRAS.510.5945M

Query : 2022MNRAS.510.5945M

2022MNRAS.510.5945M - Mon. Not. R. Astron. Soc., 510, 5945-5962 (2022/March-2)

Orbits of globular clusters computed with dynamical friction in the Galactic anisotropic velocity dispersion field.

MORENO E., FERNANDEZ-TRINCADO J.G., PEREZ-VILLEGAS A., CHAVES-VELASQUEZ L. and SCHUSTER W.J.

Abstract (from CDS):

We present a preliminary analysis of the effect of dynamical friction on the orbits of part of the globular clusters in our Galaxy. Our study considers an anisotropic velocity dispersion field approximated using the results of studies in the literature. An axisymmetric Galactic model with mass components consisting of a disc, a bulge, and a dark halo is employed in the computations. We provide a method to compute the dynamical friction acceleration in ellipsoidal, oblate, and prolate velocity distribution functions with similar density in velocity space. Orbital properties, such as mean time-variations of perigalactic and apogalactic distances, energy, and z-component of angular momentum, are obtained for globular clusters lying in the Galactic region R <= 10 kpc, |z| <= 5 kpc, with R, z cylindrical coordinates. These include clusters in prograde and retrograde orbital motion. Several clusters are strongly affected by dynamical friction, in particular Liller 1, Terzan 4, Terzan 5, NGC 6440, and NGC 6553, which lie in the Galactic inner region. We comment on the more relevant implications of our results on the dynamics of Galactic globular clusters, such as their possible misclassification between the categories 'halo', 'bulge', and 'thick disc', the resulting biasing of globular-cluster samples, the possible incorrect association of the globulars with their parent dwarf galaxies for accretion events, and the possible formation of 'nuclear star clusters'.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): globular clusters: general - Galaxy: kinematics and dynamics

Simbad objects: 103

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Number of rows : 103
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3917 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17435 0
3 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 199 1
4 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 303 0
5 C 1250-669 OpC 12 53 00.3 -67 10 28           ~ 18 0
6 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 425 0
7 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3427 0
8 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 462 0
9 NGC 5946 GlC 15 35 28.58 -50 39 35.0           ~ 194 0
10 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 374 0
11 [FSR2007] 1716 OpC 16 10 33.0 -53 44 12           ~ 45 0
12 Cl Lynga 7 OpC 16 11 03.65 -55 19 04.0           ~ 112 0
13 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 716 0
14 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1850 0
15 NGC 6144 GlC 16 27 13.86 -26 01 24.6           ~ 243 0
16 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 214 0
17 ESO 390-6 GlC 16 28 40.10 -35 21 13.0     12.0     ~ 97 0
18 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
19 ESO 452-11 GlC 16 39 25.50 -28 23 52.0           ~ 66 0
20 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 677 0
21 NAME 2MASS-GC03 GlC 16 52 10.602 -47 03 29.00           ~ 52 0
22 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 186 0
23 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
24 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 153 0
25 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 620 0
26 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 369 1
27 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 278 0
28 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 224 0
29 NGC 6293 GlC 17 10 10.42 -26 34 54.2           ~ 281 0
30 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 359 0
31 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 216 0
32 NGC 6325 GlC 17 17 59.27 -23 45 57.7           ~ 171 0
33 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 317 0
34 NGC 6342 GlC 17 21 10.14 -19 35 14.7     10.01     ~ 286 0
35 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
36 NGC 6355 GlC 17 23 58.65 -26 21 12.3   12.46 11.05     ~ 155 0
37 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 396 0
38 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 251 0
39 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 312 0
40 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 117 0
41 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 169 0
42 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
43 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 263 0
44 NGC 6380 GlC 17 34 28.00 -39 04 09.0           ~ 140 0
45 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 255 0
46 Ton 2 GlC 17 36 10.500 -38 33 12.00           ~ 93 0
47 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 914 1
48 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 386 0
49 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 172 0
50 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1976 0
51 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 178 0
52 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14417 0
53 NAME cl Djorgovski 1 GlC 17 47 28.30 -33 03 56.0           ~ 77 0
54 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 847 1
55 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 551 0
56 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
57 ESO 455-49 GlC 17 50 46.40 -31 16 31.0           ~ 185 0
58 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 166 0
59 NAME UKS 1 GlC 17 54 27.20 -24 08 43.0           ~ 93 0
60 VVV CL001 Gl? 17 54 42.5 -24 00 53           ~ 29 0
61 NGC 6496 GlC 17 59 03.68 -44 15 57.4   9.96       ~ 225 0
62 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 121 0
63 ESO 456-38 GlC 18 01 49.10 -27 49 33.0           ~ 92 0
64 NGC 6517 GlC 18 01 50.376 -08 57 34.39   11.08       ~ 182 0
65 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 99 0
66 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 524 0
67 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 294 0
68 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 524 0
69 NGC 6539 GlC 18 04 49.74 -07 35 09.1           ~ 225 0
70 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 120 0
71 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 296 0
72 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 377 0
73 [HJK2000] GC01 GlC 18 08 21.8 -19 49 47           ~ 57 0
74 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 601 0
75 NAME 2MASS-GC02 GlC 18 09 36.5 -20 46 44           ~ 53 0
76 NGC 6558 GlC 18 10 17.6 -31 45 50           ~ 225 0
77 IC 1276 GlC 18 10 44.26 -07 12 27.3           ~ 121 0
78 ESO 522-1 GlC 18 12 15.80 -22 44 31.0     14.86     ~ 96 1
79 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 238 0
80 ESO 456-78 GlC 18 14 06.600 -28 38 06.00           ~ 62 0
81 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 886 1
82 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 770 0
83 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 234 0
84 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 462 0
85 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 206 0
86 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 439 0
87 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1379 0
88 ESO 591-12 GlC 18 41 29.90 -19 49 33.0           ~ 114 0
89 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 386 0
90 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 519 0
91 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 244 0
92 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2187 2
93 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 500 0
94 NGC 6749 OpC 19 05 15.36 +01 54 00.0     12.4     ~ 157 0
95 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2001 0
96 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 240 0
97 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 854 0
98 GCl 114 GlC 19 45 14.40 -08 00 26.0     7.54     ~ 142 0
99 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1128 0
100 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3140 0
101 NAME Galactic Bulge reg ~ ~           ~ 4299 0
102 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 522 0
103 NAME Helmi Stream St* ~ ~           ~ 76 0

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