2013ApJ...778...57G

Query : 2013ApJ...778...57G

2013ApJ...778...57G - Astrophys. J., 778, 57 (2013/November-3)

Quantifying mass segregation and new core radii for 54 Milky Way globular clusters.

GOLDSBURY R., HEYL J. and RICHER H.

Abstract (from CDS):

We present core radii for 54 Milky Way globular clusters determined by fitting King-Michie models to cumulative projected star count distributions. We find that fitting star counts rather than surface brightness profiles produces results that differ significantly due to the presence of mass segregation. The sample in each cluster is further broken down into various mass groups, each of which is fit independently, allowing us to determine how the concentration of each cluster varies with mass. The majority of the clusters in our sample show general agreement with the standard picture that more massive stars will be more centrally concentrated. We find that core radius versus stellar mass can be fit with a two-parameter power law. The slope of this power law is a value that describes the amount of mass segregation present in the cluster, and is measured independently of our distance from the cluster. This value correlates strongly with the core relaxation time and physical size of each cluster. Supplementary figures are also included showing the best fits and likelihood contours of fit parameters for all 54 clusters.

Abstract Copyright: ∼

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

Simbad objects: 54

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Number of rows : 54
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 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1042 0
3 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 520 0
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1430 0
5 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 497 0
6 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1420 0
7 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 885 0
8 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 573 0
9 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
10 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 425 0
11 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
12 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 620 0
13 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3427 0
14 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2479 0
15 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 443 0
16 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 828 0
17 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1978 0
18 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 462 0
19 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 374 0
20 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 716 0
21 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1850 0
22 NGC 6144 GlC 16 27 13.86 -26 01 24.6           ~ 243 0
23 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
24 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2193 0
25 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 677 0
26 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
27 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 359 0
28 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2116 0
29 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 396 0
30 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 312 0
31 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
32 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 914 1
33 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1976 0
34 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
35 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 294 0
36 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 377 0
37 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 288 0
38 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 886 1
39 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 462 0
40 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 439 0
41 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1379 0
42 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 386 0
43 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1069 0
44 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 244 0
45 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 500 0
46 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2001 0
47 M 56 GlC 19 16 35.57 +30 11 00.5           ~ 422 0
48 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 854 0
49 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1128 0
50 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 422 0
51 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 430 0
52 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3140 0
53 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
54 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1049 0

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