2018MNRAS.475.1574D

Query : 2018MNRAS.475.1574D

2018MNRAS.475.1574D - Mon. Not. R. Astron. Soc., 475, 1574-1586 (2018/April-1)

Wandering off the centre: a characterization of the random motion of intermediate-mass black holes in star clusters.

DE VITA R., TRENTI M. and MacLEOD M.

Abstract (from CDS):

Despite recent observational efforts, unequivocal signs for the presence of intermediate-mass black holes (IMBHs) in globular clusters (GCs) have not been found yet. Especially when the presence of IMBHs is constrained through dynamical modelling of stellar kinematics, it is fundamental to account for the displacement that the IMBH might have with respect to the GC centre. In this paper, we analyse the IMBH wandering around the stellar density centre using a set of realistic direct N-body simulations of star cluster evolution. Guided by the simulation results, we develop a basic yet accurate model that can be used to estimate the average IMBH radial displacement (<rbh> ) in terms of structural quantities as the core radius (rc), mass (Mc), and velocity dispersion (σc), in addition to the average stellar mass (mc) and the IMBH mass (Mbh). The model can be expressed by the equation [?\left?]<r_ bh[?\right?]>/r c=A(m c/M bh)α[σ_ c2r_ c/(GM c_)]^β, in which the free parameters A, α, and β are calculated through comparison with the numerical results on the IMBH displacement. The model is then applied to Galactic GCs, finding that for an IMBH mass equal to 0.1 per cent of the GC mass, the typical expected displacement of a putative IMBH is around 1 arcsec for most Galactic GCs, but IMBHs can wander to larger angular distances in some objects, including a prediction of a 2.5 arcsec displacement for NGC 5139 (ω Cen), and >10 arcsec for NGC5053, NGC6366, and ARP2.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): black hole physics - methods: numerical - stars: kinematics and dynamics - galaxies: star clusters: general

Simbad objects: 83

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Number of rows : 83
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 Mayall II GlC 00 32 46.5323801712 +39 34 40.504803060   14.564 13.807 13.208 12.684 ~ 389 1
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12650 1
4 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1042 0
5 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1085 0
6 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 520 0
7 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 243 1
8 NAME E 1 GlC 03 55 02.5 -49 36 52           ~ 208 0
9 Cl Pal 2 GlC 04 46 05.91 +31 22 53.4   15       ~ 180 0
10 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1430 0
11 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 817 0
12 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 497 0
13 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 932 0
14 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1420 0
15 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 328 1
16 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 885 0
17 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 354 1
18 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 573 0
19 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
20 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
21 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 620 0
22 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3427 0
23 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2479 0
24 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 443 0
25 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 828 0
26 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 300 0
27 NGC 5694 GlC 14 39 36.52 -26 32 18.0           ~ 301 0
28 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 351 0
29 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 408 0
30 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 389 0
31 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1978 0
32 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 374 0
33 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 368 0
34 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 716 0
35 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1850 0
36 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 214 0
37 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
38 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2193 0
39 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 366 0
40 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 677 0
41 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 186 0
42 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
43 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 620 0
44 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 369 1
45 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 224 0
46 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 216 0
47 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2116 0
48 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 317 0
49 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
50 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 312 0
51 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
52 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 914 1
53 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 386 0
54 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 551 0
55 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
56 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 294 0
57 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 524 0
58 NGC 6539 GlC 18 04 49.74 -07 35 09.1           ~ 225 0
59 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 377 0
60 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 601 0
61 IC 1276 GlC 18 10 44.26 -07 12 27.3           ~ 121 0
62 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 238 0
63 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 288 0
64 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 234 0
65 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 462 0
66 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 439 0
67 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1379 0
68 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 519 0
69 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1069 0
70 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 500 0
71 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 240 0
72 M 56 GlC 19 16 35.57 +30 11 00.5           ~ 422 0
73 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 428 0
74 GCl 111 GlC 19 18 02.10 +18 34 18.0           ~ 111 0
75 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 354 0
76 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 854 0
77 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 366 0
78 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 422 0
79 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 430 0
80 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 532 0
81 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
82 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 516 0
83 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 301 0

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